JetCat RX V10 Turbine User manual
JetCat RX V10 Turbine is a sophisticated model jet turbine that utilizes an internal kerosene start system using only a single fuel for starting and running. The turbine features a centrifugal compressor and an axial turbine wheel, and is controlled by a sophisticated on-board electronics that monitors the operating parameters. The ECU is displayed on the included handheld terminal (GSU) and several parameters can be modified by the user for optimizing different installations.
JetCat RX Turbines with V10 ECU
Ingenieur-Büro CAT, M. Zipperer GmbH, Etzenbach 16, 79219 Staufen
Tel: + 49 (0) 76 36-78 03-0
Fax: + 49 (0) 76 36-78 03-45
Internet: www.jetcat.de
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Contents
...................................................................................... 16
................................................................................ 18
TARTING AND STOPPING THE TURBINE
FTER THE START PROCESS IS INITIATED
: ................................................................... 24
NITIAL DEFAULT DISPLAY SCREEN AFTER POWER UP
.......................................................................................... 25
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.................................................................................. 25
URBINE STARTING DISPLAY SCREEN
SMOKER VAVE…………………………………………………………………………………………………….32
CHANGEOVER FUEL AND SMOKE PUMP……………………………………………………………………32
CONNECTION OF FUEL AND SMOKEPUMP PICTURE….…………………………………………………33
ADJUST SMOKE FLOW…………………………………………………………………………………………..33
CONNECTION DIAGRAMM OF THE SMOKE SYSTEM……………………………………………………34
The TESTMenu……………………………………………………………………………………………………43
S
F
Technical Data.............................................................................................................................................................54
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Introduction
Welcome to the Jet Age of model aircraft! JetCat is pleased to sell, support and service the JetCat turbine engine and greatly appreciates your purchase. We hope the JetCat turbine brings you many days of pleasurable flying.
Obviously, model turbine aviation - despite all the apparent fun involved - is serious business. The
JetCat turbine has undergone extensive testing and redesign, in order to ensure it is a safe and reliable model turbine; however, it is not a recommended power source for the average model builder. It requires a good background in model flying and a working understanding of the principles of turbine engines, along with a disciplined commitment to correct and safe operation, in accordance with these instructions.
To begin, read this manual thoroughly. Develop an overall impression of the turbine and its operating procedures, measuring equipment and accessories. Study the material step-by-step and ascertain how to install, operate and maintain your turbine engine. If you are unsure about anything, re-read it again.
DO NOT OPERATE THE JetCat turbine BEFORE YOU HAVE READ THE MANUAL AND FULLY
UNDERSTAND EVERY PROCEDURAL DETAIL
Should you still have doubts or questions, do not hesitate to contact JetCat for further assistance.
The JetCat model jet turbine closely functions like a full size jet turbine. A centrifugal compressor compresses the incoming air which is mixed in the combustion chamber with fuel (jet fuel / kerosene) and ignited. The result is a rapidly expanding volume of gas that drives an axial turbine wheel. The gas exiting the exhaust cone produces the required thrust for the jet model. To start the turbine, an electric motor is mounted on the front of the turbine. During startup to preheat the combustion chamber was formerly done with an auxiliary gas (propane / butane). However, the new JetCat RX series turbines utilize an internal kerosene start system using only a single fuel (kerosene) for starting and running. This single fuel operation is a more appropriate and simpler way of starting instead of the using a glow plug and an auxiliary fuel. RX turbines have the fuel control valves mounted internally for a very simple single fuel connection. The compressor is machined from high strength aluminum alloy using modern CNC technology. This guarantees even higher speed stability and an incredibly fast and precise acceleration.
The JetCat V10 ECU is a sophisticated on-board electronics that controls and monitors all the operating parameters. The parameters are displayed on the included hand held terminal (GSU) and several can be modified by the user for optimizing different installations. The power supply for all on board components, including the internal starting plug, is supplied via a 9.9V lithium iron phosphate battery.
The complete turbine kit contains all components required for operation and is a “plug and play” configuration.
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Safety, meaning of symbols
ATTENTION!
This symbol highlights the following points which must be strictly observed by the user! Any violation of the corresponding restrictions may impair the safe operation and the safety of the user.
ATTENTION!
This symbol highlights restrictions which must be strictly observed by the user! Any violation of the corresponding restrictions may impair the functional efficiency and severely compromise user safety.
ATTENTION!
This symbol highlights information that should be heeded by the user to ensure safe operation of the device
ATTENTION!
Fire or explosion hazard!
ATTENTION!
This symbol warns of hot objects and surfaces.
Any violation of the corresponding restrictions may affect the health of the user.
Safety Precautions
WARNING!
Errors and / or defects in the construction or operation of a jet model can lead to personal injury or even death.
ATTENTION!
Before you put a model aircraft in operation, you must learn about the law. Legally, a model aircraft is a real aircraft and is subject to applicable laws which must be strictly adhered to.
The rules of other countries are to be observed accordingly.
WARNING!
It is your responsibility to protect others from injury. The minimum operating distance of residential areas to ensure the safety of people, animals and buildings must be at least 1 mile.
Never operate model turbine jet aircraft in or around residential or heavily populated areas.
Keep a safe distance away from power lines. Do not fly the model in bad weather with low clouds or fog. Never fly into direct sunlight, otherwise you might lose sight of the model. To avoid collisions with manned or unmanned aircraft, land your model immediately if a plane approaches. Persons or animals must comply with the following minimum safety distances from a turbine model:
In front of the turbine
On the side of the turbine
= 15 feet
= 25 feet
Behind the turbine = 15 feet
WARNING!
The construction and operation of the model and / or turbine under the influence of alcohol, drugs, medicines, etc. are strictly forbidden. These activities must take place only in the best physical and mental health condition. This applies to both the operator and any assistants.
WARNING!
The JetCat model jet turbines were designed exclusively for model aircraft and are NOT suitable for any other purpose. Never use for any other purpose except for the flight of the model. Any other types of uses may result in personal injury or death.
WARNING!
Any deviations from these instructions or the instructions of the manufacturer, the use of other parts or materials or changes to the system may have an adverse effect on the functionality and reliability of the turbines and therefore must be avoided at all costs.
WARNING!
The operation of a model jet turbine can only be done under strict accordance of the model, remote control and turbine operation manual. Before flying the model, all control functions and surfaces as well as the range of the remote control system must be checked in the accordance of the manufacture. The checking of these operations must be repeated with a running turbine engine including the remote control system range.
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WARNING!
In case of a mishap, fire extinguishers should be on hand at all times. JetCat recommends the
CO/2 variety. Powdered extinguishers will corrode the precision components inside the turbine and void your warranty.
WARNING!
When the turbine is running, never place your hands closer than six inches into the area of the intake. An extreme suction which can grasp a hand, fingers or other objects in an instant exists in this area. Always be aware of this source of danger!
Prevent foreign materials from entering the intake or exhaust when working with the turbine.
Before operation, make sure there are no lose parts or debris near the turbine. Objects being sucked in can cause severe damage. If your installation allows, we highly recommend using a
“Jet Net” to protect the intake.
WARNING!
Never run the turbine in a closed room, or an area near any kind of flammable matter. Do not fly turbine-powered aircraft near flammable materials, nor in forested tracts or areas experiencing drought or dryness. Obey all forest fire regulations and warnings by refraining
from operating the JetCat turbine in restricted fire zones.
WARNING!
The overflight of people, especially at low altitude, is strictly prohibited
Attention!
Always exercise caution around the hot parts of the turbine, to avoid burns. The outer case at the turbine stage and nozzle reaches 450-600
(Celsius), while the exhaust gas may exceed
800
C.
WARNING!
Assure that the fuel is mixed with approximately 5% synthetic oil. Use only synthetic turbine oils available at local airport fuel suppliers. Synthetic turbine oils are dangerous and should only be handled as per the manufactures MDS sheets. JetCat has available a compatible oil that is less harmful that also contains an antistatic ingredient. Contact JetCat for more information.
WARNING!
To the avoid hearing damage, always use hearing protection when you are near a running
turbine engine!
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Quick Start section for RX turbines with V10 ECU
This section covers just the very basics to get your JetCat turbine up and running. However, it is not a substitute for reading and understanding the manual in its entirety. There are many great features and options not cover in this section that are fully explained later.
Identify components
Mounting turbine support equipment
Mounting turbine and fitting to tail pipe
Fuel and electrical connections
Battery power
GSU and I/O board
ECU power, setting failsafe and learn R/C
Preparing fuel and fuel system
Starting and stopping the turbine
Running states
Troubleshooting
Identify components
1
– Turbine engine
1
– Pump Cable
1
– GSU, Ground Support Unit (Terminal)
1
– Fuel Line
1
– ECU, Electronic Control Unit
1
– Fuel Filter
1
– Mini I/O board
1
– Pump
1
– Turbine Mount
1
– Battery Pack
1
– Turbine Power/Data Cable
1
– I/O Board Flat Cable
1
– GSU Data Cable
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Mounting the turbine support equipment
There are just four main accessory components to decide where and how to mount in your model,
(battery, ECU, I/O board and pump). Judge how to position these components within the cable lengths by laying them out in your model approximately where you would like to mount them. Since the components of the new RX series engines are so small, the default cables lengths should work for most installations. If longer cables are needed, consider a battery cable extension with heavy gauge wire as the simplest approach.
1. Battery. Usually the battery will mount in the nose area for balance requirements. When mounting, make sure it is secure but accessible since it is a component you will be removing regularly.
2. ECU should be mounted on a wood plate typically with Velcro. It should also be located in an easy location for removal. Consider applying the
Velcro on the opposite side of the “on” switch access hole. See photo.
3. The I/O board should be mounted where the LED indicators will be visible and the data bus jack accessible for plugging in the GSU.
4. Ideally the pump should be mounted inverted using 4/40 screws and nuts through the flange holes (tubes mounted down and electrical connections on top.
The pump requires a 1” diameter clearance hole. The pump can also me mounted horizontally with cable ties or clamp. Make sure that the fuel tubes will route so the fuel filter will be easy to access for cleaning. Favor the pump nearer to the UAT hopper tank keeping the inlet tube length as short as possible.
Topside view of equipment
plate
Underside view of equipment
plate
In the above pictures is one example on how to mount the pump. In this case, there was plenty of room under the mounting plate to not pinch the tubes exiting the pump.
Mounting the turbine
A two-piece, aluminum mounting bracket is included with the turbine. Place the bracket around the turbine, with the center plug situated within the slot of the bracket or in the grooved portion of the turbine body depending on turbine type. This will help stabilize the turbine along the thrust axis. Secure the turbine, using four metric mounting screws and lock washers that are provided with brackets. The turbine can be set to any 360 degree rotational position.
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Turbine side view / thrust tube
For internally mounted turbines that do not utilize a bypass, set the ducting inlet ½ to ¾ of an inch after the end of the exhaust nozzle. For bypass installations, refer to the kit instructions for mounting the turbine. Use either reflective material or BVM heat shield paint to protect the fuselage near the hot section of the turbine. Do not mount electrical components, fuel tubing or parts that could melt around the
hot section of the turbine.
Inlet Protection
Especially for models that have the air intake below the fuselage behind the nose wheel (F16 for example), there is the danger of small stones or dirt entering the turbine. In these cases you must incorporate intake protection (screen) in front of the turbine.
JetCat re commends a “Jet Net” to protect the turbine from debris. Available from JetCat!
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Connections
Once you have unpacked and identified all the components, follow the system diagram/photo for all connections.
Complete System Connection Diagram
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Complete System Connections Photo
6mm tubing, included with
OPTIONA
L UAT
BVM
UAT,
NOT
INCLUD
ED
6m m x
4m m ada pter
Fuel pump
ECU
I/O board
Fuel input
Fuel filter
Ballcoc k valve
Not required
4m m tubi ng
Batter y
Receiver,
NOT
INCLUDE
D
Receiver throttle input cable.
Connect to throttle channel
Receiver
AUX input cable.
Connect to
AUX channel
–
OPTIONA
L, Not used for single channel operation
Power data cable
PAGE 11 of 54
Fuel connections
When installing tubing on a metal nipple fitting, secure the tubing by a double loop of safety wire around the connection. To remove tubing from the nipples, you must cut the tubing off. Be careful not to damage the nipple when cutting off the tubing. Warming the tubing can make it easier to slip over the nipple fitting. To insert tubing into
Festo quick release fittings, use firm pressure until you feel the tube snap in. To release, press in on the blue plastic front ring, while pulling the tubing out.
The ballcock valve can be put on either side of the
Arrow indicates fuel direction
filter. When assembling the fuel filter, use caution not to pinch the O-ring when assembling. Clean off aluminum dust and lubricate fine threads before assembling.
We recommend mounting the fuel filter vertically. This will limit the possibility of air being trapped inside and then coming out at an inopportune time. It is also better not to affix it but to leave it free to slightly move.
ALWAYS use a gasoline-compatible stopper in your fuel tanks. Silicon stoppers swell and leak.
The fuel demands are high, especially on larger engines, and require large tubing interconnecting the tanks. Use a 6 mm to 4 mm adapter to reduce the UAT 6 mm tubing to the 4 mm tubing connecting to the pump inlet.
For safety reasons, JetCat recommends to replace the fuel pump after 25 hours of flight!
Festo fitting
Hopper Tank - UAT
A hopper tank is recommended, between the main fuel tank and the turbine. JetCat highly recommends the
BVM UAT for the hopper tank! The UAT is available as an option from JetCat.
Always use the filter between the fuel pump and the turbine as shown in the diagram. This is true even when using the BVM UAT! The pump can emit small particles that can block the internal solenoid valves from completely closing!
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Electrical connection
Throttle input
Optional AUX input
I/O board flat cable
Power data cable
Battery
Fuel pump connection, use either plug
GSU, hand held terminal
Pump cable
Optional Mini
GSU. Can be installed in the plane
Cable to
ECU
ECU / Mini GSU
– I/O board connections.
Plugs are interchangeable
Interconnections
Connect the fuel pump cable to either connector on the fuel pump and the
ECU.
Connect the Power/Data cable to the turbine and ECU.
Connect the Flat cable to the LED
I/O board and ECU.
Connect a fully charged battery to the ECU. To charge the battery, refer to the
Power section of this manual.
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Power
The operating power for all components of the turbine (starter / glow plug / ECU / fuel pump / valves ...) is from a 3-cell 9.9V 2200 mah LiFePo battery. Alternatively, a 2 cell 25C or better LiPoly battery can be used, refer to battery types later in the manual in the Limits Menu options. The battery plugs directly into the ECU and the ECU powers on automatically when the receiver is switched on. If you plan to store the model for more than a few weeks, the battery should be disconnected.
Attention!
Fire! A LiPo/LiFePo battery can explode if incorrect charge parameters are used. You should therefore always refer to the manufacturer's charger instructions. NEVER charge the batteries unattended. Do not exceed the batteries maximum allowed charging
current. READ AND OBEY WARNINGS ON BATTERY BEFORE CHARGING!
Always ensure the batteries are at their optimal charge state before use. The battery is heavily loaded because of the kerosene start. Please also note that at very low ambient temperatures, LiPo/LiFePo batteries have lower capacities.
IMPORTANT: DO NOT INSERT A SWITCH BETWEEN THE BATTERY AND ECU.
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Ground Support Unit (GSU)
The GSU serves as a terminal for displaying and programming turbine parameters.
It may be connected or disconnected at any time. The real time nature of the ECU allows the operator to adjust the turbine’s parameters, even when the turbine is running.
GSU Control Panel Descriptions
Jet-tronic
Alphanumeric, 2 line by 16 characters, backlit LCD display
◄- or ►+
Scroll within a menu or through different menus. Also used for changing turbine parameter values
(4) Hotkeys
Directly enters the menu named on the corresponding blue key
-
Info
Run
Manual
– Enter parameters for several functions or for directly starting turbine
Ignition
– Runs starter motor for testing or for directly starting turbine
Manual
OPTIONAL: Mini GSU, Part# 61161-00
+
Limits
Ignition
+
Min/Max
With all the functionality of the larger version and, because of its small size and weight, it can be mounted in the model providing direct access to all information and functions.
Remote - GSU
Standby / Man.
Ignition on
Pump running
OK / Reset...
Change
Value
Item
Select
Menu
Standby - LED, (yellow)
Ignition - LED, (red)
Pump running - LED,
(red)
OK - LED, (green)
Change value key for altering turbine parameters in conjunction with the
◄- or ►+ keys
Select Menu key for selecting different menus in conjunction with the
◄- or ►+ keys
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GSU Switch Descriptions
Key
Info
Run
Explanation
Directly displays the Info menu (Hotkey).
Directly displays the Run menu (Hotkey).
Limits
Min/Max
Directly displays the Limits menu (Hotkey).
Directly displays the Min/Max menu (Hotkey).
Select Menu
When the Select Menu key is pressed and held, the ◄ - / ►+ keys are used to select
Change
Value/Item
another menu. When a desired menu is reached, release the Select Menu key, and your selection becomes the currently displayed menu.
When the Change Value/Item key is pressed and held, the ◄ - / ►+ keys are used to change the indicated value. If the value is admissible to change, a small arrow appears in the display before the value. If the indicated value cannot be changed (e.g.: current
RPM or temperature), the display will indicate that the “Value/Item cannot be changed”.
Please take the time to understand the table above especially the descriptions for the
Select Menu and Change Value/Item keys. These are often used for viewing additional menus other than the Hotkey menus and for changing ECU settings.
The LED I/O Board
The LED I/O (Input/Output) board is a connection point for the data bus and a display for the current status of the ECU. The LED I/O board also features a pushbutton switch function to learn your R/C system, calibrate EGT probe or reset all parameters back to default (when powered up). These procedures are described later.
Push button switch
Data bus jack for connection to the
GSU
LEDs
Description of LEDs on the GSU and LED board
Color Designation LED is a LED flashes
Yellow Standby / start Starter Motor engaged ---
Red
Green
Pump running
OK
Fuel pump is on
Turbine running: throttle control active
Kerosene glow plug defective or turbine power / data cable is disconnected
If the turbine is running, the EGT is exceeding the maximum temperature.
If the turbine is off, Slow Down mode is active
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If the yellow Standby and green OK
LED’s blink simultaneously, the battery is low and must be recharged.
OPTION: Part# 61168-00
The I/O board is enclosed within a housing and includes a connector for charging the battery.
WARNING!
When you charge a LiPo/LiFePo battery, the battery must be removed from the plane and never left unattended. READ AND OBEY WARNINGS ON
BATTERY BEFORE CHARGING!
Jetcat V10 ECU
Switching on the ECU
The battery is directly plugged into the ECU connector or via the optional Charge Plate I/O board (part
#61168-00). NEVER use a switch between the battery and ECU!!!.
The ECU turns on automatically when power is applied to one of the two receiver connections, (THR and
/ or AUX channel). If the ECU was powered on with the transmitter off (no servo pulse), then there is a 60 second delay if the ECU is immediately powered off. To force the ECU to power off, simultaneously press the "Manual" and "Run" switches on the GSU.
The ECU can also be turned on without the receiver being powered on. To do this, there is a switch on the ECU labeled "on" and with a ballpoint pen or similar device, press the switch for 5 seconds. Settings can now be made or the turbine can be started via the GSU. After 60 seconds of inactivity, the ECU will shut off automatically. By simultaneously pressing the "Manual" and "Run" switches on the GSU, the ECU can be turned off immediately.
If the GSU is connected to the ECU then immediately after switching on the ECU, the GSU will briefly display the software version number, starting fuel type and turbine type.
ECU version, V10.1G in this example
Starting fuel type, kerosene in this example
Turbine type, P100-RX in this example
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Single or two channel operation?
The turbine may be operated with either one or two channels from your receiver (throttle only or throttle and an auxiliary channel). If single channel is selected, starting, stopping and controlling the power is all accomplished with just the throttle channel. If two channel operation is selected, an auxiliary channel can be used to start, stop or optionally control other special features of the ECU like the smoke pump and airspeed control explained later in the manual. Most commonly, one channel is used.
How to set your ECU for single channel operation
Single channel operation can be selected automatically by not connecting the auxiliary channel cable to the receiver. When you are in the learn R/C mode, it will detect the auxiliary channel is not plugged in and will automatically change to single channel operation (auxiliary channel = Not Used).
To manually select one or two channel operation, follow the instructions below. This is required for changing from single to two channel operation.
Plug in the GSU and power up the system.
Press the Limits key.
Using the ►+ key, scroll through the selections until AUX-channel func is displayed.
There are three selections in the AUX-channel func menu. While pressing the Change Value key, use the ◄ - or ►+ key to scroll through these selections.
:ON Turb Ctrl ON
:ON Turb Ctrl OFF
:Not Used
Aux channel enabled for turbine control enabled.
Aux channel enabled for speed limiter functions and/or Smoker.
Turbine control disabled. You still need to use the AUX channel for speed limiter and/or smoker functions but the turbine control will be in Single
Channel Mode.
Single Channel Mode.
Totally disable the AUX channel input for turbine control, speed sensor and smoker functions. AUX channel wire does not need to be connected to the receiver in this mode. If Not Used is selected and you have a speed sensor, the Maximum Limit Speed is still active, limiting the maximum speed your plane will fly. You cannot disable this safety function.
Setup failsafe mode
The ECU has the unique ability to shut-off your turbine if you have a radio failure. This is accomplished by detecting that the signal f rom the receiver’s throttle output is either missing or outside the values that were learned during setup.
YOU ARE REQUIRED TO USE THE FAILSAFE!
This will not instantly shut off the turbine. A timer is started when the failsafe condition occurs and the turbine will immediately go to idle. After 2 seconds (AMA requirements as of March 1, 2004) the turbine will then shut off. This 2 second timer is reset back to zero anytime a non-failsafe condition is met. Your
R/C signal must be broken for at least 2 continuous seconds before the turbine is shut off.
The following failsafe instructions are for PCM or Spread Spectrum receivers only. (PPM
Receivers are not allowed under AMA rules.)
Setting the failsafe
The following procedures are for most radios like JR, Futaba or Airtronics/Sanwa
→
If you look at the following servo travel graph below, you can see how the ECU detects a failsafe condition. The gray bar is the transmitters throttle channel end points set for +/- 100% travel. This is the travel range when setting the transmitter’s failsafe. The white bar is a reduced end point travel set for +/-
PAGE 18 of 54
50% travel. This is the value that will be taught into the ECU. If the throttle input to the ECU is between
50% for low throttle, low throttle trim and 50% for high throttle, then this would be within the
ECU’s taught range a nd will operate normally. If a failsafe condition exists, the transmitter’s pre-programmed 100% low throttle, low throttle trim will be outputted by the receiver and this value would be outside of the ECU’s taught in range. The ECU will now automatically set the turbine to idle (after a default 0.1 second
FailSafe delay) and start a programmable timer. The timer is set to 2 seconds by default. If the timer times out, the ECU will shut-off the turbine. If at any time during this countdown the receivers signal is reacquired, the ECU timer will be reset and the turbine will go back to the speed the throttle stick is currently at.
Setting the travel range to +/- 50% does not affect the RPM range of the turbine.
Low Throttle
Before setting failsafe, set throttle travel at 100% low / 100% high throttle
Failsafe area
Set Failsafe
Teach ECU at 50% low / 50% high throttle
Failsafe area
High Throttle
If you change your transmitter’s failsafe after these steps are completed, you must redo the following instructions again.
FOR TWO CHANNEL OPERATION: Do not enable the auxiliary channel in your transmitter for failsafe.
Keep it in hold mode only. The auxiliary channel is always designed to stop the turbine instantly if commanded to do so.
For spread spectrum radios, there are two different ways to set the failsafe. It is either accomplished by the transmitter
’s failsafe menu or by binding the receiver to the transmitter. Refer to your transmitter’s manual on how to set the failsafe.
To set the failsafe, you must execute the following steps. It is VITAL that these steps be performed in this order for the failsafe feature to operate properly. YOU MUST PERFORM THESE STEPS!
Inspect the transmitter programming to ensure that dual rates and exponential functions are disabled and sub trim is set at zero for both throttle and, if two channel operation, the auxiliary channel. Some transmitters have a travel limit menu in addition to travel end points menu. If so, set the limits to its maximum amount >= 100%
Set your transmitters end point travel parameter to +/- 100% for low and high throttle.
If you are using two channel operation, position the auxiliary channel to the center position.
Set your transmitters throttle stick to low throttle and low throttle trim. Depending on the radio system you are using, either set the throttle channel for failsafe and store/memorize this minimum position or bind your receiver to the transmitter.
Return to the travel end point menu and now set the low and high throttle end point to +/- 50%.
Now you must teach in these values into the ECU. Refer to Learn R/C section next in this manual.
Additional Failsafe menus are explained in the manual’s advanced section.
“Learn R/C”. Teach the ECU to the R/C System
Before the ECU can be used for the first time you must program the failsafe and learn the throttle stick and optionally the auxiliary control positions of your R/C system.
To accomplish this, complete the following steps:
1. Connect one or both ECU servo cables to the receiver depending on either using single or two channel operation. The “THR” cable connects to the throttle channel and if used, the “AUX” cable must be connected to a channel capable of three (3) positions or a variable control.
PAGE 19 of 54
Make certain that all other connections are made in accordance with the Electrical
Connection Diagram.
Note: Even if you do not use the auxiliary channel for control, you can still plug the
“AUX” cable into an unused receiver channel for a redundant power signal connection. However, if this is done, you must manually disable the auxiliary channel in the limits menu.
2. While pressing the Select Menu key on the GSU, switch on the receiver.
Note: Instead of the Select Menu key on the GSU, the small button switch on the LED I/O board may be pressed instead. This key can also be used to advance through the learn R/C sequence (described below). This feature is useful when the GSU is not available. Keep in mind that the LED’s on the I/O board are the same as the GSU for Standby, Pump running and OK.
Release Select Menu only after the three LED’s display the following blink sequence:
LED
Standby/Man.
Pump running
OK
Blink Sequence
Yellow
Green
Red
....
The GSU screen will display:
3. This procedure enables a system mode, whereby the stick positions can be learned by the
ECU. When Select Menu is released, only the green OK LED should illuminate. If the pulse width number is
“:0 us” and the green OK LED is flashing rapidly, then there is a problem with the receiver output. Test with a servo and ensure the transmitter / receiver are working correctly. To test the connection, move the throttle stick and the pulse width number should change. If not, the THR cable is not connected to the correct channel.
The GSU screen will display:
Throttle channel “Off” position
4. Now the ECU can memorize the positions of the throttle and AUX channels. First, place the throttle stick and throttle trim to minimum. Next, press Select Menu or the LED I/O board button switch again. This will store the R/C system’s pulse width for immediate shutdown of the turbine. The green OK LED will turn off and the red Pump running LED will illuminate.
The GSU screen will display:
Throttle channel “Idle” position
PAGE 20 of 54
5. Advance the throttle trim lever to maximum. Press Select Menu or the LED I/O board button switch again to store the R/C system’s pulse width for the turbine idle position. The red Pump
running LED will turn off and the yellow Standby LED will illuminate.
The GSU screen will display:
Throttle channel “Full Power” position
6. Advance the throttle stick to maximum. Press Select Menu or the LED I/O board button switch again to store the R/C system’s pulse width for the turbine full power position. The yellow
Standby LED will turn off. If your ECU is set up for single channel operation skip to instruction number 11.
The GSU screen will display:
AUX channel minimum “Off” position.
7. If the ECU is set for two channel operation, continue to program the auxiliary channel. The green OK LED will illuminate again and initiates the learn mode for the three-position auxiliary channel.
8.
9. Move the auxiliary channel to the minimum position for Off and press Select Menu or the LED
I/O board button switch again to store the R/C system’s pulse width for immediate shutdown of the turbine. The green OK LED will turn off and the red Pump running LED will illuminate.
The GSU screen will display:
AU X channel center “Start/Standby” position
10. Set the auxiliary channel to the middle position for Start/Standby and press Select Menu or the LED I/O board button switch again to store the R/C system’s pulse width for the turbine to start and run. The red Pump running
LED will turn off and the yellow Standby
LED will illuminate.
The GSU screen will display:
AUX channel maximum “Auto-Off” position
11. Set the auxiliary channel to the maximum position for Auto-Off and press Select Menu or the
LED I/O board button switch again to store the R/C system’s pulse width for a normal auto shut-off of the engine. The yellow Standby LED will turn off.
12. The green OK LED will flash and the display will briefly show
“SAVING SETUP DAT“ and then return to the normal default RUN screen. Return the throttle stick and trim to the minimum position and the auxiliary channel (if used) to Off and the green OK LED will turn off. This completes the programming.
The ECU will now permanently store the data. Repeating this procedure is only necessary when the R/C system is changed or adjusted.
PAGE 21 of 54
Note: This data is permanently stored in the turbine. If you change ECUs, the turbine data will be copied into the new ECU and the “learn R/C” will not need to be redone
.
Verify failsafe programing
You can verify the failsafe function in the default RUN screen with the GSU. With your receiver and ECU on, turn off the transmitter. After about two seconds a should display on the screen.
Failsafe active
Turn your transmitter back on and the should clear from the screen. The failsafe must function to
operate the turbine in a safe manner.
Preparing fuel and fuel system
Warning!
Obey local laws for the transportation and storage of fuels.
Fire warning!
When mixing the fuel with oil or when operating (fueling, defueling, etc.), never handle near an open flame.
Please do not spill or empty fuel to the ground.
The JetCat engine can use deodorized kerosene, 1-K kerosene or Jet-A1 for fuel. Fuel must be mixed with 5% synthetic turbine oil.
Example formula: 1 quart of oil in 5 gallons of fuel.
JetCat recommends low toxicity JetCat oil with anti-static additive or Aeroshell 500 turbine oil although any turbine oil that conforms to MS23699 standards will work.
To reduce static charges from the fuel system, we recommend adding our anti-static additive (Part#
61198-00) or JetCat Turbine Oil (Part# 61197-00) with anti-static additive already blended in.
Please note: Fully synthetic 2-stroke oils or Mobil DTE are not suitable and should not be used.
Fueling on board tanks
Do not fill the on board tanks too quickly. There is capillary resistance in a series tank system, possibly causing a high pressure rupturing of a tank.
Fill the on board tanks through the UAT tank filling tube. Make sure the “fuel dot” is fitted after refueling. It is important to check the “fuel dot” for a secure fit. If it leaks, the UAT can fill with air, causing the turbine to shut down.
PAGE 22 of 54
Prime the pump and system
To prime the fuel pump and fuel lines (or for fuel pump test purposes), it is necessary to open the fuel solenoid shutoff valve and run the fuel pump manually. For this purpose, use the Test
–Functions Menu selection, Fuel Pump Test (Purge Fuel). This test opens the fuel valve and acts as a speed control for running the pump. Note: RX engines have internal solenoids so the valve function is irrelevant.
Before activating the purge pump mode, ALWAYS remove the fuel feed line connected to the turbine.
Pump Test / Purge Fuel allows the fuel pump to operate without the turbine running.
However, if the fuel feed line is not removed from the turbine during this procedure; it will become flooded with fuel. When this occurs, the next turbine start can become highly combustible!
Use the select menu key and select the Test-Functions menu.
Remember when the Select Menu key is pressed and held, the ◄ - / ►+ keys are used to select another menu. When a desired menu is reached, release the Select Menu key, and your selection becomes the currently displayed menu.
Press the Change Value/Item key to run the pump. If you want to change the voltage the pump runs at, press either the ◄ - or ►+ while pressing the Change Value/Item key. It is best to lower the pump voltage back down to the 0.5V default amount when finished.
Running the turbine for the first time
The Checklist
Before Running the Turbine
Charge ECU Battery. You must read and obey warnings on the LiPo/LiFePo battery pack.
Prepare CO2 fire extinguisher
Check fuel lines and filter. Make sure they are clean with no restrictions
Check that the fuel tank vent is unobstructed
Mix 5 % oil in fuel (i.e.: 1 quart per 5 gallons of kerosene)
Fill fuel tank(s). Make sure the main and header tanks are full
Turn on receiver switch
Place the model with nose into the wind
Activate brakes and start turbine
After Stopping the Turbine
Turn model into the wind. Activate brakes and stop turbine
During the cooling process the receiver switch can be shut off at any time. When the cooling process is complete, the ECU will automatically shut off
After each flying session, defuel the tanks before storing.
WARNING!
In case of a mishap, fire extinguishers should be on hand at all times. JetCat recommends the
CO/2 variety. Powdered extinguishers will corrode the precision components inside the turbine and void your warranty.
Starting and stopping the turbine
1.
Prepare to start by completing the startup checklist.
2.
Single Channel Mode start/stop procedure.
PAGE 23 of 54
a.
To start the turbine, place the throttle stick and trim to their minimum positions. Next, move the trim to its maximum position. Finally, move the throttle stick to its maximum position.
b.
When the throttle stick is set to the maximum position, the ECU will begin a fully automatic starting sequence. This starting sequence can be immediately stopped at any time by moving the throttle stick and trim to the minimum positions.
c.
To stop the turbine after it is running, throttle up just above idle and let it stabilize for a couple of seconds, then move the throttle stick and throttle trim to their minimum positions. The auto-cool down mode will start when the turbine has nearly stopped rotating.
3.
Two Channel Mode start/stop procedure.
a.
Set the throttle stick and trim to their minimum positions and the AUX switch to the Off position.
b.
Move the throttle trim lever to its maximum position.
c.
Set the AUX switch to the middle Start/Standby position. The turbine is now ready to start!
d.
Advance the throttle stick to its maximum position and the turbine will start.
e.
Once the turbine begins to accelerate, the throttle stick can be returned to idle position.
f.
When the throttle stick is set to the maximum position, the ECU will begin a fully automatic starting sequence. This starting sequence can be immediately stopped at any time by moving the AUX switch to the Off position and/or reducing the throttle stick and trim to the minimum positions
g.
To stop the turbine after it is running, set the AUX switch to the Auto-Off position. The turbine will increase RPM above idle, stabilize and then shut off. The auto-cool down mode will start when the turbine has nearly stopped rotating.
4.
As soon as the turbine stabilizes at idle speed, the green OK LED will illuminate, indicating that thrust control is now handed over to the pilot. The throttle stick must be in the idle position for the green OK LED to illuminate.
When initiating a start, the LED’s will blink in a continuous sequence of green to red to yellow. If the throttle stick is above minimum position when initiating a start sequence, the
LED’s will blink in a continuous sequence yellow to red to green indicating an error. Bring the trim to the maximum position and the throttle stick to the minimum position and this will correct the error condition.
After the start process is initiated, the following occurs:
1. After the start signal has been received, the starter motor is shortly activated to give an
“acoustical signal” that the start sequence has been initiated.
2. Now the Kerosene-Igniter is pre-heated for approximately 5 seconds (the starter motor is not running).
3. Next, the starter motor spools up the turbine to a constant speed and then starting fuel pulses into the turbine until the combustion chamber rises above 120 degrees C. The yellow Standby LED will illuminate when the starting motor engages. Should ignition not occur, after a 30-second period of time, the process is aborted and the green OK LED will blink.
4. Turbine RPM will progressively increase until achieving stable speed. When the turbine speed surpasses the idle RPM value, the starter motor disengages and the yellow Standby LED goes out.
5. As the turbine approaches its stabilize RPM, it will briefly dwell, before automatically decelerating to idle RPM.
6. When the turbine attains idle speed and the throttle stick is placed at idle position, the green OK
LED will illuminate, indicating that thrust control is now handed over to the pilot.
PAGE 24 of 54
Automatic Cooling Process
After the turbine spins down from Auto Off or Manual Off, the starter motor will spin the turbine rotor at a slow constant speed until the Exhaust Gas Temperature is below 100
C.
ATTENTION!
Two channel control only:
In unsafe situations (e.g.: a model fire), the automatic cooling process may contribute additional oxygen. To immediately discontinue the cooling process, bring the throttle stick to idle, throttle trim to the minimum position and the AUX switch to Off.
GSU (Run menu default) display symbols
Initial default display screen after power up
Exhaust temperature in
C
Battery voltage
Battery icon shown ½ full
Turbine RPM
Off Condition
– none indicated
In 1000 units
After power up
– “error condition” display screen
Igniting plug defective
Failsafe active, transmitter off?
PAGE 25 of 54
Flashing -E-, EGT sensor defective
Last Off Condition,
Low RPM shut-off from previous run
Turbine starting display screen
Exhaust temperature in
C.
Current pump voltage
Started directly from
GSU
– explained in advanced section
Current state, only during startup
Turbine running display screen
Turbine Running States
Actual RPM in thousands
Set RPM, commanded from transmitter
The JetCat turbine progresses through several operating states, from ignition to the cool down process.
The transitions of these states are automatically controlled by the ECU and by user commands. The current value is always displayed on the GSU screen in the STATE selection in the RUN menu. When the turbine is starting, the GSU will also display the current state on the bottom line of the display. Whenever the engine is in cooling mode or the starter is tested with the Ignition key, the top line of the GSU display will flash “! – Cooling - !”.
PAGE 26 of 54
Explanation of the Turbine States
Table 1
Value Explanation
-OFF-
Standby /
START
AUX switch in the Off position and/or the throttle trim in the Off position. All
LEDs are off.
Turbine is off (preventing starting).
AUX switch positioned to the Start / Standby position, throttle trim at maximum and throttle stick at idle. The LED chase sequence is started from green to red to yellow, continuously. When throttle stick is advanced to the maximum position, the starter motor engages to spin the rotor. When RPM reaches a preprogrammed value, the starter motor’s voltage is removed and the turbine is ready to ignite.
Pre Heat 1
The burner is pre-heated for 3-7 seconds (the starter motor is not running)
Pre Heat 2
The starter motor spools up the engine to it’s ignition. After another few seconds the ignition of the engine is engaged by injecting kerosene into the Kerosene-Igniter. The pump and the internal starting fuel solenoid will begin pulsing.
MainF-On
Main fuel solenoid opens and kerosene is modulated into the engine.
AccelDly
Delay while combustion chamber is preheating. Waiting for a rise in EGT.
Ker.Full
Stabil.
Starting fuel solenoid closes and all the fuel is now directed to the main injectors. The red Pump running LED turns on and will stay illuminated as long as the pump operates.
Turbine successfully accelerates to the idle RPM, then automatically increases speed to about 30% higher RPM. When this speed is maintained consistently for at least one second, the turbine will proceed to the next state (Learn LO).
Learn LO
In this state, the turbine automatically decreases RPM to the idle speed.
As soon as idle speed is attained, with the throttle stick in the idle position, the turbine will proceed to the next state (RUN (reg.)).
Run (reg.)
Turbine in the normal running state; the throttle stick will regulate turbine thrust.
During this operant condition, the green OK LED will illuminate, indicating that pilot has control. (red LED is already illuminated)
RUN (regulated) continues, until the turbine is switched off.
Auto Off
The AUX switch placed in the Auto Off position.
Turbine automatically increases RPM if at idle and remains at that RPM for a few seconds, before transition to the next state (Slow Down).
Slow Down
During this state, the fuel shut-off valve is closed and the fuel pump is stopped.
The green OK LED blinks and the GSU displays !-Cooling-!, indicating Slow Down
Speed
Control
This condition will continue, until all of the following parameters are met:
Turbine speed less than 800 RPM
EGT is less that 100 degrees C.
The AUX switch is moved to the Off position and throttle trim is moved to the minimum position
Once these conditions are met, turbine proceeds to Off.
Speed Control mode -- only active when the air speed sensor is connected. Regulates model flight speed.
PAGE 27 of 54
Table 2
Code Value
1
2
3
Explanation
R/C Off
AUX switched to Off position or throttle stick and throttle trim moved to the minimum position.
OverTemp
Turbine running over temperature. Exceeded high temperature parameter and time out.
IgnTimOut
Turbine did not ignite within programmed time interval.
4
5
6
7
8
AccTimOut
Turbine achieved ignition, but did not accelerate within programmed time interval.
Acc.Slow
Turbine achieved ignition, but acceleration was less than the programmed value, during startup.
Over-RPM
Turbine exceeded the maximum RPM, by 5% and a delay of 0.5 seconds.
Low-RPM
Turbine running under the minimum RPM, by 10% and a delay of 3 seconds.
Usually triggered by a flame out.
BattryLow
Battery pack is dead. Cell voltage is < 1.0V.
9
10
Auto-Off
Turbine shut down via the AutoOff sequence, using the AUX channel.
LowTemp
EGT dropped below the minimum value. A dislodged EGT sensor can trigger this shut down.
HiTempOff
EGT exceeded the maximum range (~950 °C).
11
12
13
14
15
GlowPlug!
Defective kero/glow plug.
WatchDog
ECU processor was locked out usually from static discharge or voltage spike in power supply.
FailSafe
Turbine was shut down from a failsafe timeout condition.
ManualOff
Turbine was shut off by using the GSU.
16
17
PowerFail
The power failed to the ECU when the turbine was running. This will occur if
TempSensor
Fail
the power was lost because of a defective battery, connection or if the switch is turned off before the engine is shut-down.
Note: If this state is displayed the Info, Min/Max and Statistics menus retain information from the previous run.
EGT sensor failed.
Note: This could happen only during startup.
18
19
Wrong Pmp
Wrong pump type, see pump configuration in the advanced section of the manual.
No Pump
There is either no pump connected or the pump cable is defective.
20 Over Curr
The electrical current to the engine is too high.
Starter may be jammed
Kero/glow plug is short circuited
PAGE 28 of 54
Troubleshooting
Most frequent errors. Cause and remedy:
Problem
Turbine doesn't ignite
Cause
Fuel supply lines are empty or not purged
ECU battery weak or empty
The kero start igniter failed. The automatic glow plug test may not detect a failed igniter!
Starting process fails Turbine is still too warm;
Cool Down not yet completed.
Low battery or faulty connection.
ECU doesn't follow full commands from the throttle stick
Turbine ignites, but the start process is discontinued.
Glow plug defective (red Pump
running LED blinks).
Three-conductor cable for starter motor and glow plug disconnected.
Programming alteration in R/C transmitter
Air in fuel feed lines.
Fuel pump not running.
Starter unit slips, makes noise.
EGT giving erratic temperature or RPM readings.
Turbine quits with
Watchdog Failure
Dust and oil sediment on the compressor nut and O-ring.
Transmitter antenna too close to the model.
Static discharge reset the ECU.
Remedy
Purge fuel system. Use the Test
Functions Menu, Purge Pump
Charge ECU battery
This is an extremely rare event but the turbine must be returned to
JetCat. It may be possible on some engine types to use a temporary external plug. Call JetCat for information.
Wait until SlowDown sequence is finished. The green OK LED will stop blinking.
Charge battery. Check ECU’s battery connection.
Replace defective glow plug.
Check cable. Check for proper connection from ECU to the turbine.
Check alignment with RC-Check menu. Re-align ECU to the R/C system.
Air leaks in fuel system. Examine all
Festo fittings, nipples, clunk, filter, etc.
Check for fuel filter clogs.
Test the pump in Test Functions menu, (as soon as the red Pump
running LED illuminates, the fuel pump must run!).
Clean O-ring and compressor nut periodically, with cotton swab and solvent.
Keep the antenna away from the model. It may cause false readings.
Do not mount ECU directly to the fiberglass body of the plane. Use a plywood mount with a layer of foam tape and Velcro between the body and the ECU. If the plane has a glossy finish and the failure happened directly after the wheels left the ground, spray the tires with an antistatic spray available from electronic or hardware supply stores.
PAGE 29 of 54
Reason for an unexpected Shut-Down
There are three ways to diagnose why the engine flamed out.
1. In the info menu the "LAST OFF-COND" variable will tell you why. For example, low RPM, high temp, fail-safe etc. This parameter is non-volatile and will be available until the engine is
run again.
2. You can view the last 8 seconds of the flight before it shut-down. This data is updated every 0.2 seconds. This allows you to see the trend leading up to the shut-down. This mode is entered by pressing the "+" key of the GSU while powering up the ECU. You can scroll through the data using the (+ or -) keys and scroll forward and backward through time using the (info or min/max) keys. This parameter is non-volatile and will be available until the engine is run again.
3. You can download and view the entire flight using the optional serial adapter Part# A1028-USB and a PC.
If the off condition is "POWER-FAIL" then the data is not valid. This occurs if the ECU or receiver battery was disconnected or was intermittent or if the receiver power goes lower than 3 volts. In this case, the data in the system would be for the previous run.
Sample of displayed values
Tim:
Time
-4.0
R:
RPM
0
S:
Set-
RPM
0
EGT:
Temp
0
Pmp:
Pump
V
0.0
Sta:
State
0
Th:
Thr. pulse
0
Au:
Aux. pulse
0
Bat:
Batt volts
0
AirS:
Air
Speed
0
See the Explanation for Turbine Shut Down for a description of each state code.
How to diagnose a shut-down from the saved data
Symptom Possible Reason
Engine quits with a trail of white smoke.
Engine shutoff state
Low RPM or Fuel
Fail
SetS:
Set
Air speed
0
This is normally caused by air in the fuel system. Make sure there is no leaks in the fuel system and most importantly, get all the air out of the fuel filter. The fuel filter should not be hard fixed to the plane but allowed to hang free. It is best mounted vertically. When you purge the fuel system, tap the filters while the pump is running to get all the air out them.
USE A BVM Ultimate Air Trap!
If the engine fails to ignite, you CAN get excess kerosene in the engine. YOU CANNOT
REMOVE EXCESS KEROSENE BY TILTING THE PLANE WITH THE NOSE UP IN THE
AIR. The kerosene will be captured by the exhaust guide vanes and will not run out of the engine. The nose must be tilted down towards the ground. The excess kerosene will then run out the intake. You may need a towel around the intake to absorb the kerosene. Clean off the starter o-ring afterwards since it may get kerosene on it as well.
PAGE 30 of 54
Manual advanced section
JetCat ECU features Version 10.00
Powerful 16/32-bit latest generation microcontroller with substantial program and data memory.
The ECU can be turned on without powering up the receiver to read data or make adjustments.
When the turbine is stopped the ECU enters a cooling process. During that time, the receiver can be immediately powered off. The ECU remains on monitoring the cooling process and will switch itself off after it is complete.
The starter motor is run at a constant speed during the turbine cooling process. This reduces the wear of the starter coupling.
The settings for the startup pump voltage are eliminated.
The fuel pump type is automatically detected and displayed.
Integrated R/C system fail-safe analysis and display of the number and duration of any faults.
After landing, the R/C system communication quality can be assessed.
Programmable fail-safe behavior. The hold times and failsafe reaction time can be programmed.
RS232 interface for PC connectivity
Turbine control using either one or two transmitter channels
Direct start and control of the turbine from the GSU terminal without the R/C transmitter.
Support for parallel connected turbines (multi engine models)
With an optional smoke system, the ECU can be programmed to generate warnings for low battery voltage, low fuel or Fail Safe.
Built-in data logger functions. The data for the last 17 minutes of operation will be stored at a resolution of one sample per second and can be read by the optional PC software. The data remains stored even after a power failure. In addition, the last 8 seconds of operation before shutdown of the turbine is stored with a resolution of 0.2 seconds. This allows for accurate fault diagnosis.
Input for an optional airspeed sensor for measurement, control and limit ing of the model’s airspeed.
Global Position System (GPS) interface for the optional JetCat GPS receiver. A highly accurate measurement and display of maximum ground speed, route distance, maximum altitude, maximum flight radius and maximum G-force of the model, etc.
Advanced test and diagnostic functions for pump, valves and sensors.
Significantly expanded Information and Min / Max menus.
Tolerant error detection for the turbine sensors. If a sensor fails the turbine does not immediately shut off but activates an emergency operation mode that may enable a safe landing. After landing, a restart is only possible after troubleshooting the error.
PAGE 31 of 54
Smoker valve
The ECU can directly control a smoker valve for injection of smoke fluid (e.g. diesel oil) in the exhaust blast. The smoker valve is of the same type as used for the fuel shut off .(Order No.:61106-00).
The function of the smoker valve can be defined in the “Limits menu”
(Parameter: „SmokerValve Ctrl“)
The possible option for the parameter „SmokerValve Ctr” are:
Option Description
DISABLED
Open if AuxSw=0
Open if AuxSw=2
The smoker valve is not used, valve is always closed !
Smoker-valve is opened if the AUX-Switch (3-Pos. switch) is brought into the lower position (“OFF”-Position) and the turbine is running.
To be able to use this function it is necessary, that the AUX-channel is activated, this is the parameter „AUX-channel func“ (see below) must not be adjusted to „NOT USED“.
Smoker-valve is opened if the AUX-Switch (3-Pos. switch) is brought into the upper position (“AUTO-OFF”-Position) and the turbine is running.
To be able to use this function it is necessary, that the AUX-channel is activated, this is the parameter „AUX-channel func“ (see below) must not be adjusted to „NOT USED“.
Smoke
Attention!
Injekt the smokefluid rear the thrust tube to avoid flash fire of unburned fuel.
Each JetCat Bus-pump can be switched between fuel
– and smoke pump, factory setting is fuel pump.
To change the setting switch off receiver, connect only the pump you want to adjust, press the key
Change Value and switch on the RC
.
Release the key Change Value once in the display appears:
PAGE 32 of 54
By pressing the” – “key the connected pump is set to smoke pump and will be detected by the system as such.
Now connect both pumps and ECU as shown in the next picture. During the next power up either pumps will be detected and logged by the system.
It’s recommended to connect the fuel pump as first to the ECU and the smoke pump to the fuel pump.
Certainly the pump can be reversed to fuel pump by runing this procedure again but press the
“+” key
PAGE 33 of 54
The smoke flow can be set up by the
Limits Menu
– Smoke Flow.
Press the Change Value key and change the value by pressing the “-“ and “+” key
Connection Diagram of the Smoke System
PAGE 34 of 54
Overview of Pumps
Pumpe, Type
B2
C4
D8
E16
Max. Efficiency (ml)
150
750
900
1800
Permitted ECU
Voltage
9,5
14,0
14,0
14,0
Smokerpumpe PRO 1800 14,0
The Smokerpumpe PR
O can’t be switched because it’s no Bus-
Pump, further it is impossible to set up the flow by GSU.
Proceed according the Smokepump PRO manual.
PAGE 35 of 54
Menu Structure
All similar data and running parameters are grouped in separate menus. Menus can be displayed and their values modified (where accessible), by using the GSU.
Menu Selections
RUN menu
MIN/MAX menu
RC-Check menu
INFO menu
STATISTICS menu
LIMITS menu
TEST menu
Selecting a Menu
The corresponding buttons (hot keys) can directly select the “Run”, “Info”, “MIN/MAX”, or “Limits” menus.
An alternate method is to press and hold the Select Menu button and use the + / - buttons for selecting.
Note: this method is the only access to all menus.
Change Values / Items
In order to change an indicated value, press and hold the Change Value/Item button while using the + / - buttons to alter its value. An arrow (
) will appear in front of the value, if it can be changed.
The RUN Menu
As soon as the ECU is switched on, the Run menu is displayed.
In the lower display line, the actual turbine RPM is indicated.
In the upper display line, the following selections can be monitored. Use the + / - buttons alone for selecting the different parameters.
Value
Temp.
Explanation
Current EGT (Exhaust Gas Temperature).
The units, °C or °F can be selected in the LIMITs menu.
Last Off command (reason for shut down). See table on page 28
OffCnd
SetRpm
State
Current turbine state.
U-Pump
AirSpeed
SetSpeed
Current pump voltage.
Current Air speed (km/h) this readout is usual for function check of the speed sensor.
Note : This readout is only supported by connected airspeed sensor.
Target state-air speed (km/h). This readout is for checking at the “speed control” mode the set target state-airspeed of throttle stick.
Note: This readout is only supported by connected airspeed sensor.
PAGE 36 of 54
The Min/Max Menu
The Min/Max menu is used primarily for diagnostics purposes. All of the following variables may be sampled manually by pressing the Change Value/Item button on the GSU.
Value Explanation
Upump-Max
Upump-Min
Maximum pump voltage.
Minimum pump voltage.
MaxTemp
MinTemp
MaxRpm
MinRpm
Maximum EGT.
Minimum EGT.
Maximum turbine RPM.
Minimum turbine RPM.
MaxAirSpd
AvgAirSpd
Maximum Airspeed (*)
Average Airspeed (*)
Flight Distance Flight distance in km (*)
AvgRpm
MaxRTmp
AvgPump
AvgTemp
Average-RPM
Average temperature at full throttle
Average pump voltage
Average temperature
(*) Only by connected air speed sensor!
The Min/Max values can be reset by pressing “Change Value”key.
The values are only valid during and after the actual run. By switching on the ECU they are reset
The R/C Check Menu
All parameters in this menu are for informational purposes only and will vary in accordance with R/C input
.
Value Explanation
Throttle%
StickPulse
AuxInp%
AuxPulse
Aux.Position
Fail Safe Count
F
Fail Safe Time
In seconds
Position of the throttle stick (by percentage, 0-100%).
Position units of the throttle stick.
Position of the 3-position AUX channel (by percentage, 0-100%).
Position units of the AUX channel.
Position of the AUX channel control
(0=Off; 1=Start/Standby; 2= AutoOff).
Indicate the numbers of Fail Safes since the ECU is active
Indicate Fail Safe-time (sec.) the ECU recognized since it is active
Menu parameters are for informational purposes only and cannot be changed.
PAGE 37 of 54
The INFO Menu
Info menu displays the following information:
Value Explanation
Rest Fuel
Fuel Flow ml/min
Remaining fuel in tank. Tank size can be entered using the LIMITs menu. Value is reset every time the ECU is switched on (or can be reset manually by pressing the Change Value/Item button on the GSU).
Actual fuel consumption in ml/min.
BattCnd
Ubattery
Baro
Temp
Last Run Time
Last Fuel Count
The condition of the battery is indicated in the upper line:
1. --OK--
2. !WEAK!
3. --EMPTY--
1.
If the battery voltage is 1.1V/Cell or higher “—OK--“ will be displayed.
2. If the battery voltage drops under 1.1V/Cell, the display will read “!WEAK!”.
Red Standby/Manual and green OK
LED’s will blink simultaneously (at a rate of twice per second). Starting the turbine is not possible, until the battery is recharged. If the turbine is already running and the battery warning function is enabled, the warning function will be activated.
3.
If the battery voltage drops under 1.0V/Cell “—EMPTY--” is displayed.
Starting the turbine is not possible until the battery is recharged. If the turbine is running, it will be immediately shut off, to avoid a malfunction of the
ECU.
Current voltage of the battery. Displayed on bottom line.
Indicate the current barometric pressure.
Temperature indicator (C°) in range of ECU
Last turbine run time.
Quantity of fuel consumed, during the last turbine run.
Last-Off PmpVolt
Last Off RPM
Last Off TEMP
Volts applied to the pump when it was switched off.
RPM of the turbine, when it was switched off.
Temperature of the turbine, when it was switched off.
Last Off Cond
Last Max Temp
Last Min Temp
Last Max Pump
Last Min Pump
Last stored Off condition.
Maximum temperature during the last turbine run
Minimum temperature during the last turbine run
Last AVG Temp
Average temperature during the last turbine run
Last MaxR AVGTmp
Average full throttle temperature during the last turbine run
Maximum pump voltage during the last turbine run
Minimum pump voltage during the last turbine run
Last Avg Pump
Last Fail Safe Cnt
Average pump voltage during the last turbine run
Number of Fail Safe during the last turbine run
Last Fail Safe Time
Fail Safe Time in seconds
Last-Max AirSpd
Last AvgAirSpd
Last Distance
Maximum reached flight speed during the last flight
(Only by connected Airspeed sensor!)
Average flight speed during the last flight
(Only by connected Airspeed sensor!)
Flight distance traveled during the last flight
(Only by connected Airspeed sensor!)
PAGE 38 of 54
Menu parameters are for informational purposes only and cannot be changed.
All “LAST” values show the results of the last flight, even if the ECU is switched off in the meantime. These results kept stored up to the next run of turbine.
The Statistic-Menu
Value
Totl Run-Time
Explanation
Total turbine running time (excluding startups).
Runs-OK
Runs aborted
Number of successful turbine runs, without errors.
Number of turbine shut downs, caused by the ECU’s safety system.
Ignitions OK
Ignitions failed
Starts failed
Number of successful ignitions.
Number of failed ignitions.
Number of failed starts.
Total fuel count
LoBatt Cut-Outs
Total fuel consumption of turbine
Number of cut off due weak battery voltage
Menu parameters are for informational purposes only and cannot be changed
.
The LIMITs Menu
The LIMITs menu allows the operator to adjust the following parameters of the turbine, within the allowable values, according to the performance requirements of a particular model.
Value Explanation
Minimum RPM
Maximum RPM
F
Lowidle RPM
Ignition-Mode
Battery Type
Turbine idle speed ( If IdleRPM-SET or Idle&Ramp-Set is enabled by
Barom.Auto Tune it will further appear (Auto) in the display and the RPM is set by ECU)
Turbine maximum speed
Indicate the thrust at full throttle. By varying the RPM this value call the related thrust of the turbine. This provides a save and easy way to limit the maximum thrust.
Reduced idle speed. This function is activated if the throttle stick is in idle and the throttle trim is set to half. The Idle speed will be decreased to the programmed value. The acceleration time to get back to the common idle speed can take 2-5 seconds according the used turbine type.
Version of ignition type:
Kerosene-N JetCat kerosene start.
This parameter is for informational purposes only and can’t be changed
Kind of connected Battery:
NiCd
LiPo 2Cell/7.4V
LiPo 3Cell/11.1V
LiFePo 3Cell/9,9V (recommend by JetCat)
PAGE 39 of 54
Barom.Auto Tune
Enables the ECU to align the control system according the barometric pressure.
The possible settings are:
Disabled: No auto tuning by ECU
IdleRPM-Set: Optimize of idle RPM only
Ramp-Set: Optimize of acceleration only
Idle&Ramp-Set: IdleRPM and acceleration are optimized
Smoker Flow
LowBat Warning
Only available by connected Bus-pump.
The smoke flow can be adjusted in a range of 0-100%.
Additional is shown the quantity of flow in milliliters (ml).
Battery warning function, Enabled/Disabled
Default = Disabled
Fueltank size
Actual capacity of the fuel tank in ml
LowFuel Limit
Fuel level (ml) to activate the fuel warning function.
LowFuel Warning
Fuel warning function, Enabled/Disabled
Default = Disabled (OFF)
AUX-channel func
The AUX-channel (3-step switch) can be used for optionally special features or disabled even for single-channel operation.
ON,TrbCtrl ON:
Aux channel enabled for turbine control
ON.TrbCtrl OFF:
Aux channel enabled for speed limiter functions and/or Smoker.
Turbine control disabled. The Aux channel is used only for speed limiter and/or smoker functions. The turbine control takes place by Single Channel
Mode
NOT USED:
Fail Safe delay
Single Channel Mode.
Totally disabled AUX channel input for turbine control, speed sensor and smoker functions. AUX channel wire must not be connected to the receiver in this mode. In case of a connected a air-speed sensor the Maximum Limit
Speed is still active and limits the maximum speed of the plane. This safety function can’t be disabled.
Delay in seconds before Fail-Safe function will be activated.
While this time the turbine speed run on the last valid stick pulse (
→HOLD) adjustable range = 0.1 -20.0 seconds.
After expiration of this term the Fail Safe Time Out starts. (see next point)
Fail Safe Time Out
Delay in front of Fail Save cut off.
While this time the turbine speed is set to the Fail Save RPM (next point)
Is there no valid pulse after the expiration of this term the turbine will be cut off by the ECU. Range 0.1-20 seconds.
Fail Safe RPM
Programmable turbine speed for the Fail Safe Time Out procedure.
Range from minimum RPM to maximum RPM.
Aux-ch Smoker Ctrl
The ECU can directly control a smoke valve or a Smoke pump for injection of smoke fluid into the exhaust blast to generate smoke.
You can use the shut off valve (Part# 61106-00) as smoke valve. For smoke pump you can use any Jetcat Smokerpump
AUX-channel programming for smoke function ( 3-step switch)
Settings:
DISABLED
Smoke solenoid is not used
→ valve is constantly closed
PAGE 40 of 54
Open if AuxSw=0
Smoker-valve is open if:
Turbine is running and the AUX switch (3-Pos. switch) is brought to lower position
(“off” position)
To be able to use this function its necessary that the AUX-channel func is activated by ON,TrbCtrl Off (see above).
That is to say the Aux switch is enabled for smoke function but not for turbine control.
Open if AuxSw=2
Smoker -valve is open if:
Turbine is running and the Aux switch (3-Pos.switch) is brought to upper position
(“AUTO-OFF” position)
To be able to use this function its necessary, that the AUX-channel func is activated by ON,TrbCtrl Off (see above).
That is to say the Aux switch is enabled for smoke function but not for turbine control.
Smoker Warn Func
If this function is activated, the smoke-valve will pulse in a sequence of 0,2 sec on and 0,4 sec off
–time if following conditions are complete:
BATTERY LOW: The valve will pulse if the ECU battery is weak/empty.
FUEL LOW: The valve will pulse if the fuel level is low the programmed
LowFuel Limit
BATT orFUEL LOW: The valve will pulse in any of this conditions
FAIL- SAVE: The valve will pulse if the ECU detect a fail safe
BATT,FUEL,FAILS: The valve will pulse in any of this conditions
ENABLESmokePmp: Enables signal for smoke pump only if turbine is running.
That is to say the pump can’t run without a running turbine
(only useful by operate a JetCat Smoke pump)
High-Temp. The valve will be pulse in case of excessive exhaust
temperature.
MaxRPM-reached: The valve will be pulsed if the turbine has reached its
maximum RPM.
Disabled: No function, off.
Note:
The smoke warn function is switched off while the throttle stick is in idle position.
IdleThrResponse
Adjustment of the throttle response (acceleration) by idle (up to average speed)
Fast default setting
Normal average acceleration
Slow slow acceleration for excessive warm weather or for operate
more than 1000m sea level
FullThr Response
Adjustment of the throttle response by full throttle (from average speed to full)
Fast default setting
Normal normal acceleration (for operation above 1000m)
GPS-Receiver
Select the port for the optional GPS-receiver.
Disabled: No GPS-.receiver connected (default)
Enable, COM1: GPS on COM1 (connected via LED-board)
Enable, COM2: GPS on COM2 (connected directly to ECU)
PAGE 41 of 54
AirSpeed units
Displayed flight speed unit in km/h or mph
ThrStick Curve
StartUp Mode
SpdCtrl SW0 Act.
Throttle stick curve, factory setting is 3.0 herewith the thrust and the throttle stick position proceed proportional. At the value 1.0 the RPM proceed proportional to the throttle stick position.
This function allows to select different start procedures.
You can decide between following settings:
SEQUENCE:
Default setting: Throttle trim to maximum, throttle stick to idle, AUX switch to center and now move the throttle stick to maximum to start the turbine.
By using the Single Channel Mode (devoid of the AUX switch) start the turbine by set the throttle trim to maximum and then move the throttle stick to maximum.
THROTTLE MAX:
Throttle trim and throttle stick to maximum. Turbine starts if the AUX-switch is set to center.
By Single Channel Mode (devoid of AUX switch) the turbine starts by move the throttle stick more than 95% of maximum.
IMMEDIATE:
The turbine starts direct by move the throttle trim to maximum and set the AUXswitch to center.
By Single Channel Mode only move the throttle trim to maximum for start.
Suggestions to start a multi-engine model
Two channel Mode:
Program one ECU to THROTTLE MAX mode but the second to SEQUENCE mode..
The “Throttle max turbine” starts by move the throttle trim and throttle stick to maximum and set the
Aux switch to center. To start the “Sequence turbine” you now have to move the throttle stick first to minimum and back to maximum.
Single channel mode:
Program one turbine to IMMEDIATE mode, the other to SEQUENCE mode.
Throttle trim and throttle stick must be set to minimum. To start the “immediate turbine” just move the throttle trim to maximum. The “sequence turbine” starts by move the throttle stick to maximum.
See chapter “Air Speed Control” of the manual
SpdCtrl SW2 ACT.
See chapter “Air Speed Control” of the manual
MAX LimitAirSpd
Max.AirSpeed
Min.Air Speed
See chapter
“Air Speed Control” of the manual
See chapter “Air Speed Control” of the manual
See chapter “Air Speed Control” of the manual
SpeedRegVal-P
SpeedRegVal-I
SpeedRegVal-D
MinRPM SpdCtrl
See chapter “Air Speed Control” of the manual
See chapter “Air Speed Control” of the manual
See chapter “Air Speed Control” of the manual
See chapter “Air Speed Control” of the manual
PAGE 42 of 54
TEST Menu
Before activating the purge pump mode, ALWAYS remove the fuel feed line connected to the turbine.
Pump Test / Purge Fuel allows the fuel pump to operate without the turbine running.
However, if the fuel feed line is not removed from the turbine during this procedure; it will become flooded with fuel. When this occurs, the next turbine start can become highly combustible!
Value Explanation
PurgeFuel
BurnerTest (Volt)
BurnerValve Test
Enable to prime the fuel pump and lines.
By pressing the “Change Value” key the fuel valve opens and the fuel pump starts to run
. To change the voltage the pump runs at, press either the “+” or “-“ key while the “Change Value “ key is pressed.
By pressing the”Change Value” key the Burner glow with the appointed voltage.
The left number displays the burner voltage the right show the current battery voltage. The burner voltage can’t be changed.
Pressing the “Change Value” key opens the burner valve
SmokerValve Test
Pressing the “Change Value” key opens the smoke valve
FuelValve Test
Pressing the “Change Value” key opens the fuel valve
Temp.
AD
Displays the data of the temperature sensor. The upper left value indicate the exhaust gas temperature, the right value call the measured value of environment.
These values are the according internal values of the AD-converter.
If appears a “F” in the upper right edge the temperature-sensor is faulty or the data cable in not connected or faulty,too.
PAGE 43 of 54
GPS Menu
To be able to use this function you have to activate it in the
LIMITS-menu (LIMITS
→ “GPS-Receiver” ”ENABLE,COM2”).
After this is completed the GPS-menu is activated and can be displayed by the GSU. Connect the GPSreceiver directly to the connector “GPS” on ECU.
The Functions of GPS Menu
Value Explanation
GPS-Speed
GPS-Alti
GpsCourse
Sat
Fix
Current model- ground speed
Current model - altitude of sea level
Current angle of model course (0-360° compass)
Numbers of received satellites.
Indicates if GPS receiver is connected to satellites
- NV = Data invalid
- OK = Connection and data ok
Lati
Long
GPS MaxSpd
GPS AvgSpd
GPS MaxAlt
GPS MinAlt
Current latitude of model
Current longitude of model
Maximum reached ground speed
Average reached ground speed
Maximum altitude sea level reached
Minimum altitude sea level reached
GP-Dist.
Total distance (km or miles, according the settings in the LIMITS menu) of model since the start of turbine. Maximum reached altitude in relation to the starting point.
Maximum radial distance (m) reached to the starting point.
MaxH R
GPS-Time (UTC)
UTC - time
G-force
Max-G
Current G-force (1G=9,81m/s²)
Maximum G-force during the flight
The MIN/MAX values can be reset by pressing the Change Value/Item key on GSU. By each turbine start a reset is automatically achieved.
Function Test of GPS-Receiver
The
GPS-receiver is connected in the right manner if the time starts to change every second. ( Parameter: GPS-Time (UTC))
To receive a valid signal from the satellites can take a few minutes, during this time there is no data shown in the display.
PAGE 44 of 54
Airspeed Sensor
The optional Airspeed Sensor consists of a pitot tube and a precision, differential pressure sensor. By sampling the ambient air temperature, the current flight speed of the model is calculated by the ECU, from the measured difference in static versus dynamic pressure.
When the ECU is used without the Airspeed Sensor, it is set in thrust control (normal) mode. In this mode, the throttle stick directly alters turbine thrust.
When the Airspeed Sensor is plugged into the ECU, it automatically establishes speed control mode. In
speed control mode, the turbine thrust is automatically controlled
– to keep the model at a predetermined speed and/or to limit the model’s maximum speed.
Speed control mode features several functions:
measurement and storage of maximum and average flight speeds
measurement of the flight distance.
automatic restriction of maximum flight speed
maintenance of current flight speed ("Hold-speed
”-mode)
regulation of flight speed, analogous to throttle stick position (adjustable "Cruise Control
”)
PAGE 45 of 54
Connection diagram for the Airspeed Sensor:
Airspeed
Sensor
2
Static pressure
1
Dynamic pressure flight direction
2
1
Pitot tube
ECU connection cable
Connect the air lines from the pitot tube to the airspeed sensor, using the 1/16 th inch ID vinyl tubing provided.
1 = Dynamic pressure input
2 = Static pressure input
Note: Tubing length and/or cross sectional area has no influence on measurement precision
Connect the Airspeed Sensor cable to the appropriate socket, where indicated on the ECU. The orange wire is aligned to the pulse symbol. Once the Airspeed Sensor is connected, the ECU controls additional functions:
under the Run menu, measurement of current air speed (“Airspeed”) and desired flight speed
(“SetSpeed”), can be displayed
under the Min/Max menu, the measured maximum speed (“MaxAirSpd”) and the average flight speed (“AvgAirSpd”), can be displayed
under the Limits menu, speed limits and the parameters of speed regulation can be predetermined
Limits menu parameters assigned to the Airspeed Sensor:
Parameter Explanation
MAX LIMITAIRSPD Maximum allowed flight speed of the model, in km/h. If this speed is achieved, turbine thrust is automatically reduced
– to keep the model from exceeding the maximum limit. This safety option is always active, despite the position of the AUX
Max.AirSpeed switch.
Maximum flight speed value, in km/h, for the Speed Control mode. This value
Min.AirSpeed
SpeedRegVal-I corresponds to the speed at the maximum throttle stick position.
Minimum flight speed value, in km/h, for the Speed Control mode. This value corresponds to the speed at the minimum throttle stick position.
Regulator speed, which sets the reaction time of the PID servo loop
– much like a sensitivity control in a gyroscope system.
Default value = 18 Increase this value, to increase reaction sensitivity.
PAGE 46 of 54
SpeedRegVal-P
SpeedRegVal-D
Regulator coefficient (proportional)
Default > 500 Under normal circumstances, does not require alteration.
Regulator coefficient (differential)
Default = 50 Under normal circumstances, does not require alteration.
SPDCTRL SW0 ACT With the Airspeed Sensor connected to the ECU – by moving the AUX switch to the Off (SW0) position, while maintaining a model air speed > 40km/h, the following options are available:
Hold-Speed = momentarily sustains the current flight speed
DISABLED/NONE = no function, thrust control remains active
SPDCTRL SW2 ACT
Turbine OFF
LrnSpeed Lo/Hi
= turbine will immediately shut off
= learn minimum or maximum flight speeds
Lrn Speed Lo = learn minimum flight speed
Lrn Speed Hi = learn maximum flight speed
With the Airspeed Sensor connected to the ECU
– by moving the AUX switch to the AutoOff (SW2) position, while maintaining a model air speed > 40km/h, the following options are available:
Hold-Speed = momentarily sustains the current flight speed
DISABLED/NONE = no function, thrust control remains active
LIN-Speed Ctrl = linear Cruise Control
3-StepSpdCtrl = three speed Cruise Control
PAGE 47 of 54
Explanation of the speed regulator options:
If the Airspeed Sensor is NOT connected
– the standard functions of the AUX switch are assigned as follows:
Standard assignments of the AUX switch:
* Position SW0 = Off, turns the turbine off, immediately
* Position SW1 = Start/Standby, normal thrust control
* Position SW2 = AutoOff, normal shutdown method
With the Airspeed Sensor connected to the ECU, the AUX switch positions SW0 and SW2 include the expanded functions that are covered in the above parameters table. These expanded assignments are only valid when the model is airborne (with a flight speed > 40 km/h), otherwise the standard functions remain active.
As long as the AUX switch is maintained in the center position, the ECU continues functioning in
thrust control mode and turbine thrust can only be determined by the throttle stick position.
Available options:
Option
Hold-Speed
Description
Maintains the current flight speed.
Flight speed is measured at the time the AUX switch is placed in the SW0 position. This action establishes the ECU in speed control mode (i.e.: the model maintains the flight speed measured at the time the mode is activated, despite the throttle stick position). This mode remains active until the AUX switch is returned to the SW1 position.
WARNING: When the AUX switch is set in the SW0 position, the model
must be flying faster than 40 km/h, otherwise the turbine will shut off.
DISABLED/NONE No function. Thrust control mode remains active.
Turbine OFF
Immediately shuts down turbine. Normal thrust control mode remains active.
LrnSpeed Lo/Hi Learns the current flight speed.
If the throttle stick is set at less than half throttle and the AUX switch is momentarily placed in the SW0 position, the current flight speed is assigned and recorded as the Min.AirSpeed parameter.
If the throttle stick is set at greater than half throttle and the AUX switch is momentarily placed in the SW0 position, the current flight speed is assigned and recorded as the Max.AirSpeed parameter.
By momentarily activating the AUX switch, this option makes it possible to store a particular slow or fast model speed, while in flight. These values then become the parameters for the Cruise Control mode, plus the operator can also display the values in the limits menu, after landing.
WARNING: When the AUX switch is set in the SW0 position, the model
must be flying faster than 40 km/h, otherwise the turbine will shut off.
PAGE 48 of 54
Lrn Speed Lo
Lrn Speed Hi
Learns the slow flight speed.
If the AUX switch is momentarily placed in the SW0 position, the current flight speed is assigned and recorded as the Min.AirSpeed parameter.
WARNING: When the AUX switch is set in the SW0 position, the model
must be flying faster than 40 km/h, otherwise the turbine will shut off.
Learn the fast flight speed.
If the AUX switch is momentarily placed in the SW0 position, the current flight speed is assigned and recorded as the Max.AirSpeed parameter.
WARNING: When the AUX switch is set in the SW0 position, the model
must be flying faster than 40 km/h, otherwise the turbine will shut off.
Cruise Control mode, with linear speed regulation to the throttle stick
LIN-Speed Ctrl
3-StepSpdCtrl position.
Flight speed is controlled between the value s of the “Min AirSpeed”
(throttle stick in the minimum position) and “Max AirSpeed” (throttle stick in the maximum position).
Cruise Control mode, featuring three different speeds.
Flight speed can be set to three predetermined speeds, between the values of “Min AirSpeed“ (throttle stick in the minimum position) and “Max
AirSpeed” (throttle stick in the maximum position).
Speed 1: “Min AirSpeed” throttle stick in the minimum to 1/3 position
Speed 2: (“Min AirSpeed” + “Max AirSpeed”) / 2 throttle stick in the
1/3 to 2/3 position
Speed 3: “Max AirSpeed” throttle stick in the 2/3 to maximum
position
Reminder:
The turbine can be immediately switched off, any time the throttle stick and the throttle trim are brought to their minimum positions.
If Hold-Speed or Cruise Control modes are activated, while the model is flying over 40 km/h -- and should the model then slow down, to a speed less than 40 km/h -- Hold-Speed or Cruise
Control will remain active. The turbine will NOT shut off, unless the AUX switch is moved back
to the SW1 position and then returned to Hold-Speed or Cruise Control position.
WARNING:
Make sure the Airspeed Sensor is working, before using features that require a minimum flight speed to operate. If the system is not operating properly, you may inadvertently shut off your engine, in flight. To verify that the Airspeed Sensor is functioning, apply a little air pressure and note the change in “Airspeed” on the run menu display.
PAGE 49 of 54
Two examples:
Example 1
– Hold-Speed function
SpdCtrl SW0 Act assigned to “Hold-Speed” and AUX switch set in the SW0 position: a) Flight speed is measured and stored, when the AUX switch is moved to the SW0 position. Thrust is then regulated automatically, to maintain this memorized speed, despite the throttle stick position.
This regulator function is turned off immediately, by returning the AUX switch to the SW1 position
(normal thrust control). b) If this function is activated while flight speed < 40 km/h, turbine will shut off, immediately (normal Off function).
Example 2
– Linear speed regulation
SpdCtrl SW2 Act assigned to “Lin-SpeedCtrl” and AUX switch set in the SW2 position:
Cruise Control mode becomes active, featuring linear speed regulation to the throttle stick
position. a)
The minimum throttle stick position corresponds to the parameter “Min AirSpeed” and the maximum throttle stick position corresponds to the parameter “Max AirSpeed”. b) If flight speed < 40 km/h when this function is activated, the turbine will shut off (normal AutoOff function).
Airspeed Sensor Mounting:
Experiments indicate that the Airspeed Sensor is more accurate when the pitot tube is side-mounted on the widest part of the fuselage. In this configuration, the pitot tube should stand off from the fuselage, by at least two (2) inches. Because each model installation is different, JetCAT will have additional mounting information for review, as auxiliary data becomes available.
Fuselage
Hold Speed and Cruise Control limitations:
> 2 inches
Under normal circumstances, the Airspeed Sensor is primarily used for limiting the maximum flight speed and/or recording the maximum and average speeds of the model. Nonetheless, Hold Speed and Cruise
Control modes are clever additions. These modes require evaluating and adjusting the PID parameters in the limits menu, while flying the model with a different technique. The slower reaction time of the throttle response necessitates executing smoother patterns, with limited pitch changes. Experimenting will identify how the turbine will react and help ascertain how to compensate for its limitations.
PAGE 50 of 54
Calibration of the Air Speed Sensor
The characteristic curves of the differential pressure sensor can be calibrated to obtain a maximum of measuring accuracy.
Additional necessary facility for calibration:
- 50
– 60cm silicone tube
- a plenty of water
- Ruler or folding meter stick
How to proceed:
1. Fill water into the silicon tube (minimum 50cm water column)
2. Fit the silicon tube to the Pitot tube or directly to the differential pressure sensor.
3. Keep p ressed the key “RUN” on GSU and switch on the electronic.
Release the key “RUN” if following appears on GSU:
CAL. AirSpeedSns
Set 40cm water
4. Adjust the end of water column to the altitude of the differential pressure sensor (or Pitot tube, if used). Press the key”INFO” on the GSU to define the zero point.
5. Raise the end of water column to a level of 40cm above the defined zero point now press the “MIN/MAX” key to store this value. You should read in the right upper edge of display h=40.0
You can check the calibration by moving the water column up and down,
The value in the display should be correspond to the value of the ruler.
The step 4/5 can be arbitrary repeated. In the right edge below the value should be in a range between 6000 and 10000. (Default = 8560)
6. To store this determined calibration data press the “MANUAL” key on GSU at last. After the ECU stored this data it transfer back to the general duty.
Schritt 4
Step 4
Airspeed
Sensor
PAGE 51 of 54
Airspeed
Sensor
40cm
Schritt 5
Step 5
Special Function
Temperatur adjustment
After a replace of a temperature sensor it need be necessary to run a temperature calibration
How to manage:
The turbine must be at ambient temperature (ca. 21°C) !!!
Press and hold the
„Select Menu“ key on GSU, then swictch on ECU (receiver).
Instead of
„Select Menu“ key of GSU, it’s possible to press the little key on the LEDboard.
The LED´s indicate the following blink sequence :
LED
Standby
OK
Blink Sequenz
(yellow)
Pump running
(red)
(green)
The dispaly of GSU indicate simultanously :
Release Key to
„Learn RC“
While this sequence hold the key
„SelectMenu“don’t realease it !!!!
Release the key if the three LED´s indicate this blink sequence:
LED
Standby
Pump running
OK
Blink Sequenz
(yellow)
(red)
.... (green)
The Display of the GSU indicate simultanously:
“Release Key to Calibrate Temp“
after releasing the key on the GSU the temperature calibration runs.
PAGE 52 of 54
Reset to Default Value
The Ecu can be reseted to default values by following descrption:
Press and keep presses the
„Select Menu“ key on the GSU, switch ond the ECU
(receiver). Insted of
„Select Menu“ Taste auf der GSU, its also possible to press the little key of the LED-board.
The LED’s indicate the following blink sequence :
LED
Standby
OK
Blink Sequenz
Pump running
(yellow)
(red)
(green)
The dispaly of GSU indicate simultanously :
Release Key to
„Learn RC“
While this sequence hold the key
„SelectMenu“don’t realease it !!!!
After awhile of ca. 15 seconds the LED’s indicat the folowing blink sequence:
LED
Standby
OK
Blink Sequenz
(yellow)
Pump running
(red)
.... (green)
While this sequence hold the key
„SelectMenu“don’t realease it !!!!
Releas the key not before the LED’s indicate following sequnce:
LED
Standby
OK
Blink Sequenz
Pump running
(gelb)
(rot)
.... (grün)
Simultanously the Display of GSU indicate:
“Release key to Reset System”
Now release the key to run the reset.
After a reset ist neccessary to:
Learn in RC
Run the Temperature calibration
PAGE 53 of 54
Technical Data
Type
Idle Rpm (1/min)
Max Rpm (1/min)
Idle thrust (N) max thrust (N)
EGT (°C) pressure ratio massflow (kg/s)
Exhaust gas velocity (km/h)
Power output (thrust) (kW)
Fuel consumption @maxRpm (ml/min)
Fuel consumption @idle (ml/min)
Fuel consumption @idle (kg/min)
Fuel consumption @maxRpm (kg/min) specific fuel consumption @ maxRpm (kg/Nh) weight (g) diameter lenght (incl. Starter) (mm)
P20-SX P60-SE P100-RX P80-SE P140-RX P180-RX P200-SX
80000 50000 40000 35000 32000 32000 33000
245000 165000 152000 125000 125000 125000 112000
0,3 1 1,9 3 6 7 9
24 63 100 97 142 175 230
480-690 480-730 510-730 510-700 520-749 520-750 480-750
1,5
0,0516
2
0,16
2,3
0,24
2,4
0,25
3,2
0,35
3,6
0,38
3,7
0,45
1674
5,6
90
12
0,01
0,072
0,18
350
60
180
1418
12,4
230
70
0,056
0,184
0,175
830
83
245
1500
20,8
360
60
0,048
0,288
0,173
1050
97
240
1397
18,8
340
95
0,076
0,272
0,168
1360
112
290
1461
28,8
550
110
0,088
0,44
0,186
1580
112
293
1658
40,3
625
122
0,098
0,5
0,171
1595
112
297
1840
58,8
730
129
0,103
0,584
0,152
2560
132
355
PAGE 54 of 54
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Key features
Internal kerosene start system
Centrifugal compressor
Axial turbine wheel
Electronic control unit (ECU)
Hand held terminal (GSU)
Single or two channel receiver operation
Failsafe mode for turbine shutdown in case of radio failure
Automatic cooling process
Troubleshooting guide
Frequently asked questions
The JetCat RX turbine uses kerosene as its primary fuel. It has an internal kerosene start system, eliminating the need for an auxiliary fuel.
To set up the failsafe mode, you need to adjust your transmitter's end point travel parameter to +/- 50% for low and high throttle and then teach these values into the ECU. The failsafe mode will automatically shut off the turbine if your radio signal is lost.
The GSU (Ground Support Unit) is a hand held terminal that allows you to control and monitor the turbine parameters, including starting, stopping, and adjusting settings.
To start the turbine, you need to connect all components according to the connection diagram, ensure the battery is fully charged, and then follow the starting procedure described in the manual.
