Aeroprakt -22L2 A-22L2 airplane Pilot Operating Handbook
Below you will find brief information for airplane AEROPRAKT-22L2 A-22L2. The AEROPRAKT-22L2 A-22L2 is a two-seat, high-wing strut-braced monoplane intended for flying in VFR, simple meteorological conditions. It is certified in the ultralight category and can be equipped with a four-cylinder, four-stroke Rotax-912UL or Rotax-912ULS carburetor-combined cooling engine. The aircraft features a tricycle landing gear with a steerable nose wheel, and can be equipped with a KievProp three-blade on-ground adjustable propeller.
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Aeroprakt Ltd.
24, Polevaya str., Kiev, Ukraine
Tel: 0038 044 496-77-21
Fax: 0038 044 496-77-31 e-mail: [email protected]
www.aeroprakt.kiev.ua
AEROPRAKT-22L2
Pilot Operating Handbook
A22L2-POH-02
This manual must be carried in the airplane at all times
AEROPRAKT-22L2 Pilot Operating Handbook
Model: AEROPRAKT-22L2 (A-22L2)
Serial No:
Registration:
XXX
A22L2-POH-02
Document No: A22L2-POH-02
Date of issue:
Approved by:
Signature:
Position:
Stamp:
Date of approval:
This airplane is to be operated in compliance with information and limitations contained herein.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
RECORD OF REVISIONS
No part of this manual may be reproduced or changed in any manner without a written consent of the Manufacturer.
Any revision of the present manual, except actual weighing data, must be recorded in the following table according to information from the Manufacturer.
New or amended text in the revised pages will be indicated by a black vertical line on the left hand margin, and the Revision No. and the date will be shown on the bottom left hand side of the page.
Rev. No.
Affected
Section
Affected
Pages
Date Approval Date
Date
Inserted
Signature
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AEROPRAKT-22L2 Pilot Operating Handbook
LIST OF EFFECTIVE PAGES
Section Page Date Section Page
4
A22L2-POH-02
Date
AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
Table of contents
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
1 General information
1.1 General
This Pilot Operating Handbook has been prepared to provide the airplane owner and operators with information required for the safe and efficient operation of this airplane.
AEROPRAKT-22L2 (A-22L2) is a two-seat, high-wing strut braced monoplane of "classic" aerodynamic layout with closed cockpit, non-retractable landing gear with steerable nose wheel, Rotax-912 engine with tractor three-blade on-ground adjustable pitch propeller.
AEROPRAKT-22L2 is intended for flying in VFR, simple meteorological conditions.
AEROPRAKT-22L2 is certified in ultralight category.
1.2 Technical data
Wing span: 9.55 m (31 ft 4 in)
Wing area:
12.62 m² (136 sq ft)
Length: 6.23 m (20 ft 5 in)
Maximum takeoff weight: 472.5 kg (1042 lb)
1.3 Airplane three-view drawing
Fig. 1
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
2 Airplane and Systems Descriptions
2.1 Airframe
Wing: high placed, strut braced, constant chord. Wing section is P-IIIa-15%. Wing primary structure consists of a single spar, ribs and aft web. Forward of the spar the wing has
2024T3 aluminum alloy skin of 0.5-0.8 mm (0.020-0.032 in) sheet, which together with the spar web forms the wing torsion box. Aft of the spar the wing is covered with thermoshrinkable fabric on top and bottom sides. Wing ribs are made of 6061T6 sheet of
0.5-0.8 mm (0.020-0.032 in) thickness. The spar is a riveted structure consisting of a web, made of 0.8 mm (0.032 in) 6061T6 sheet, and caps, made of an extruded section (D16chT alloy angle). The wing strut attachment bracket and front attachment bracket of the wing are fixed to the spar. The rear attachment bracket of the wing is fixed to the aft web. The flaperon (drooping aileron) hinge brackets are fixed to ribs No. 1, 5, 9 and 13. All brackets are made of 5 mm 2024T3 sheet.
The primary structure of the flaperon consists of the leading edge skin, spar, trailing edge section and ribs. The LE skin and spar comprise the torsion box. Flaperon covering is made of synthetic thermoshrinkable fabric.
The fuselage is an all-metal structure. The mid section is made of the 2024T3 aluminum alloy bent sheet sections of 1.5 to 2 mm (0.063 to 0.080 in) thickness, which form the edges of the mid section. The tail boom is a monocoque structure made of 0.8 mm (0.032 in) 2024T3 aluminum alloy sheet.
Engine cowling is made of composites.
The fuselage has 6 frames (bulkheads). Frames No. 1, 2, 4, 5 and 6 are press-formed of an aluminum alloy sheet; frame No. 3 is made of bent sheet sections. Power plant and nose LG attachment points are attached to the frame No. 1, the engine mount taking part in transferring the loads from the nose LG onto the fuselage structure.
The wing and strut attachment brackets as well as the main LG legs attachment brackets are attached to the frame No. 3. Frames No. 4, 5, 6 are installed in the tail boom.
The fin and ventral fin with the tail wheel are attached to the frames No. 5 and 6.
The bottom and part of the topside of the mid fuselage section are covered with aluminum alloy sheets of 0.5 mm (0.020 in) thickness.
The doors, cockpit and part of the fuselage have windows of organic glass.
The primary structure of the stabilizer consists of ribs and a spar. The skin is a 2024T3 aluminum alloy sheet of 0.5 mm (0.020 in) thickness. The stabilizer has brackets of its attachment to fuselage and 3 elevator hinge brackets.
The fin, structurally similar to the stabilizer, is made as integral part of the fuselage.
Elevator and rudder structures are similar to that of the flaperons.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
2.2 Landing gear
Airplane landing gear is of tricycle type with steerable nose wheel. The main LG is of the cantilever spring type. The main LG leg spring is made of aluminum alloy, it is attached to the lower boom of the frame No. 3 at two points: upper and lower supports. The support brackets are machined of aluminum alloy. The main LG wheels are fitted with hydraulic disk brakes.
The nose LG leg is steerable, of trailing link type. The steering is ensured using the rudder pedals via pushrods, connecting the left and right side pedals with a rocker on the strut.
The leg consists of a strut and a trailing link in form of nose wheel fork. The trailing link is connected to the strut with a shock absorber/damper.
The nose leg is attached to the frame No. 1 at 2 points
– on upper and lower supports. The upper support is made of 5 mm 2024T3 aluminum alloy sheet and the lower one is buildup. The supports are fitted with brass bearings.
Each wheel is fitted with a wheel spat (fairing) or mud screens (in case of the low-profile tires and 6.00×6 wheels).
Landing gear data: wheel base
– 1710 mm (5 ft 7 in), wheel track
– 1285 mm (4 ft 2 in), min. turn radius ~ 2 m (~ 7 ft).
Main wheels: size
– 5.00×5 or 6.00×6 pressure
– 1.6 kg/cm 2
(22.7 psi)
Nose wheel: size
– 5.00×5 or 6.00×6 brakeless wheel steering angle ±30 degrees pressure
– 0.16 MPa (1.6 kg/cm²)
2.3 Engine and its controls
A-22L2 can be equipped with a four-cylinder four-stroke Rotax-912UL or Rotax-912ULS carburetor combined cooling engine produced by BOMBARDIER-ROTAX Inc. (Austria).
The engine is has the flat-four layout, dry sump lubrication system with a separate oil tank of 3 l (0.8 US gal) capacity, automatic valve clearance adjustment, two carburetors, mechanical membrane fuel pump, double electronic ignition system, integrated water pump, electric starter, integrated gearbox of 2.273 or 2.43 reduction ratio.
All engine systems (fuel, electric, cooling) are assembled in accordance with Rotax-912 engine operation manual.
The engine can be fitted with an air intake pre-heater box designed by Aeroprakt, which improves engine operating conditions, preventing carburetor icing in cold weather and increasing the engine output in hot weather.
2.4 Propeller
A-22L2 can be equipped with any suitable propeller matching to Rotax-912 UL/ULS engine power output and the airplane speed range. One of the optional propellers is KievProp three-blade on-ground adjustable propeller of 1.7 m (5'7") diameter.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
2.5 Fuel system
The fuel system (Fig. 2) includes two wing fuel tanks 1 with filler inlets 2 and fuel lines 9
connecting the tanks to each other and to the engine fuel pump 6 (that is feeding fuel to the engine carburetors 10) via two fuel valves 3, gascolator 11 and fuel filter 5. Fuel can be drained from the tanks using the drain valve 4. The fuel tanks are connected with the atmosphere via the vent lines 8. Capacity of each fuel tank is 45 l or 11,9 US gal.
Fig. 2. Fuel system schematic
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
NOTE: When both tanks are full, fuel may flow from one tank to the other (e.g. due to the lateral forces during side slipping or when wings are not level on parking or during taxiing), overfill it and spill out through the vent line. To prevent fuel spilling out in this case it is recommended to close one of the fuel valves and avoid side-slipping in flight.
CAUTION! At all times during the flight ensure fuel coming to the engine by opening the valve(s) of the tank(s) WITH fuel. If one of the tanks is empty, close its valve to prevent air getting into the fuel line and causing engine malfunction or even failure.
Capacity of tanks:
2×45 l (2×11,9 US gal)
Total capacity: 90 l (23,8 US gal)
Usable fuel: 89 l (23,5 US gal)
Non-usable fuel: 1 l (0,3 US gal)
Fuel: unleaded MOGAS min. RON 95 or AVGAS 100LL
2.6 Airplane control systems
Airplane control systems include control systems for drooping ailerons (flaperons), elevator with trim tab, rudder and nose wheel, engine and brakes.
The control system is combined consisting of foot- and hand-actuated subsystems.
Ailerons and elevator are hand-actuated and are controlled using yokes.
2.6.1 Elevator control system
The elevator control system linkage (see Fig. 3) is rigid, comprising 3 pushrods and 2
bellcranks. “Push” and “pull” forces are applied by the pilot to the stick 1 is passed via the control column 2 to the pushrod 3, then via the bellcrank 4 to the pushrod 5. The force is transferred to the elevator via the pushrod 7, attached to the bellcrank 6. And the pushrod
7 is supported by the rollers 8 and connected to the elevator arm 9. The elevator angles of deflection are: upward 25
±1°, downward 15±1°.
Fig. 3
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
2.6.2 Elevator trim tab control system
Elevator trim tab is used for controlling the force on control yokes in pitch. The trim tab control lever is accessible from both pilot seats.
Fig. 4
The trim tab control lever 1 (Fig. 4) is placed on the central console. It is retained in place
by friction adjusted using the wheel 2.
The trim tab control lever is connected with a cable 3 to the trim tab control arm 4. The cable is running through the flexible conduits 5 (in the central console) and 6 (in stabilizer) and cable fairleads 7 and 8 inside the tail boom. The trim tab is hinged to the elevator trailing edge on a wire serving also as a torsion spring.
The trim tab angles of deflection are: upward 21±1°, downward 22±1°.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
2.6.3 Rudder and nose wheel control system
Rudder and nose landing gear are controlled using pedals. Rudder is connected to the pedals in the cockpit with two cables of 2.7 mm (0.11 in) diameter. The pedals are attached to two shafts (shaft for left pedals 1 and shaft for right pedals 2) hinged to the
lower fuselage beams (Fig. 5). Each shaft has two arms. One of the arms is connected
with a cable to the rudder control arm 3, the other - with a rod - to the nose landing gear control arm 4. Rudder control cables are running from the pedals to the rudder control arms via pulleys 5, 6 installed at frames No. 3 and 4 and fairleads 8, 9 on pilot seat beam and frame 5. Tension of the cables is adjusted using turnbuckles 7 attached to the pedal shaft arms.
In its neutral position the rudder is rotated to the right by the angle of +2
°20' for compensation of the engine torque. The rudder deflection angle is 25±1°.
Fig. 5. Rudder and nose landing gear control system
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
2.6.4 Control system of flaperons (drooping ailerons)
The airplane is equipped with flaperons (drooping ailerons), which serve as both ailerons and flaps. The flaperon control system ensures independent function of flaperons as ailerons and flaps using a differential mechanism.
Fig. 6. Control system of flaperons (drooping ailerons)
The control force in roll (Fig. 6) applied by the pilot to the control stick 1 is passed to the
central control shaft 2. Then from the bellcrank 9 attached to the shaft it is passed via the pushrods 7 to the flaperon control shafts 6. The shafts are attached via a Cardan joint 5 to the bracket at the root end rib of the flaperon 4 at one end and to the trunnion on the levers 3 of the flap control mechanism at the other. Stop 8 limits the rotation angle of bellcrank 9 on the central control shaft and, therefore, angles of yoke rotation and aileron deflection
Deflection angles of the flaperons (as ailerons): up
– 19±1°, down – 13±1°.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
Fig. 7. Flap extension mechanism
As flaps (Fig. 7) the flaperons are extended by setting the flap extension lever 1 to the
required positions and thus rotating the flap shafts 5 by the respective angles via link 3 and levers 4. Locking of the flap setting is achieved by means of the stopper block 2 with three slots for the locking pin on the flap extension lever. Unlocking is achieved by bending the flexible flap extension lever to the side and thus taking the locking pin out of the fixing slot.
When the required flap setting is selected the locking pin is aligned with the fixing slot and the flap extension lever springs back inserting the locking pin into the fixing slot.
Deflection angles of the flaperons (as flaps): 1 st
position
–9º30'±1°, 2 nd
position
–18°50'±1°.
2.6.5 Engine controls
The engine controls are accessible from both right and left side pilot seat. Engine RPM is controlled using a single throttle lever located on the central console. Two control cables connect the throttle lever to the left and right carburetors on the engine.
The fuel mixture control (for engine starting) is achieved using the choke lever also located on the central console near the throttle lever. The choke lever is connected to the carburetors with cables as well.
Carburetor heating control knob is located on the instrument panel. It controls position of a shutter in the air intake box. When the shutter is open, the colder outside air is coming through the air scoop into the air intake box and then to the carburetors. When the shutter is closed, the carburetors are supplied with the hotter air from the engine compartment and thus the carburetor heating is ensured.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
2.6.6 Brake control system
The main wheel brakes (Fig. 8) are actuated hydraulically using the brake lever 2 (installed
next to the throttle lever 3) controlling the pressure supplied from the master cylinder 1 to the slave cylinders 5 in the wheels.
The main LG wheels have disk brakes. The cylinders are connected to each other with copper tubing 6 with outside diameter of 3 mm. The master cylinder 1 is connected with a hose 8 to the extension tank 7, installed on the firewall in the engine compartment.
When the brake lever is pulled the brake pads squeeze the brake disc creating the braking moment proportional to the applied force.
A-22L2 is equipped also with a parking brake, which is actuated with a lever 4 on the central console. To use the parking brake, set the lever to 'Parking brake ON', then pull and release the brake lever. The brake pads will remain pressed to the brake disc. To release the parking brake set its control lever to its initial position ('Parking brake OFF').
Fig. 8. Brake control system
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
2.7 Instrument panel
A-22L2 instruments set and instrument panel are represented on see fig. Fig. 9
Numbers in the pictures denote the following:
1. Placard with passenger warning:
“ANY AEROBATIC MANOEUVRES
AND INTENTIONAL SPINNING ARE PROHIBITED!
”
2. Placard with operating limitations:
“MAXIMUM WEIGHT - 472 KG (1040 LB),
MINIMUM LOAD IN COCKPIT - 60 KG (132 LB), MAXIMUM LOAD IN COCKPIT WITH
FULL FUEL TANKS - 100 KG (220 LB)
”
3. NO CHARGE indicator and marking
4. ALARM indicator and marking
5. Cockpit heating control knob and marking
6. Carburetor heating control knob and marking
7. Left tank fuel level indicator and marking "FUEL L"
8. Right tank fuel level indicator and marking "FUEL R"
9. Landing light switch and marking
10. Navigation lights switch and marking
11. Strob lights switch and marking
12. Transponder switch and marking
13. Radio switch and marking
14. Intercom switch on/off switch and marking
15. 12V plug on/off switch and marking
16. IGN A switch
17. IGN B switch
18. Master and starter key
19. ON marking for electric and ignition switches
20. OF marking for electric and ignition switches
21. IGN A marking
22. IGN B marking
23. Master marking
24. Starter marking
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
Fig. 9
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
Full and static pressure system
The full and static pressure probe (1) is located on the left wing strut. It supplies the pressure to the airspeed indicator.
This system supplies the full (dynamic) and static pressure of the outside air to the instruments measuring the flight parameters: airspeed, rate of climb and altitude. The system consists of the full and static pressure probe 1 and full 2 and static 3 pressure lines
connecting the probe to the instruments (see Fig. 10). Full and static pressure lines have
joints 4 used to disconnect the lines when the left wing is removed during aircraft disassembly.
The full and static pressure lines are connected to the airspeed indicator. The altimeter and vertical speed indicator are connected to the static pressure line.
Good condition of the full and static pressure system is important for correct measurement of the flight parameters and therefore for flight safety. Pilots must take all measures necessary to keep the system in good condition. During the preflight check pilot must remove the cover from the full and static pressure probe and inspect the probe and lines to make sure that they are not damaged or blocked (by water, ice, dirt, etc.). After flight pilot must put the cover back on the probe.
Fig. 10. Full and static pressure system
2.8 Electric system
Electric system of A-22L2 serves for generation of electric power and supplying it to the onboard electric consumers.
When engine is running (its RPM is above 1400), electric power is generated by the engine alternator, converted by a rectifier-regulator (located on the firewall) and is stored in a 12V DC 19Ah battery, located behind the left pilot seat. The battery is supplying electric power to the consumers (engine starter, instruments, lights, etc.) through the electric cables of appropriate section (depending on the consumed current), switches and fuses
(located on the instrument panel). The fuses are required to protect the electric system and consumers from excessively high current and must be of appropriate type and size.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
When battery is supplying power to the consumers while alternator is not generating and supplying power to the battery (e.g. engine is not running or due to some other reason)
NO CHARGE light signals that the battery is discharging and its power may be lost after some time. When alternator starts recharging the battery NO CHARGE light goes out.
MASTER switch controls power supplies of all onboard consumers (except for the engine ignition system and consumers with their own built-in power source, e.g. GPS) together with the electric switches for separate consumers. The engine ignition system may be switched ON/OFF only with the ignition switches.
Electric system wiring depends on the electric equipment/instruments installed in the aircraft and therefore have main and additional (optional) portions. The respective wiring diagrams are shown on Fig.11
– Fig. 15.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
Fig. 11. Wiring diagram of A-22L2 electric system (main)
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
Fig. 12 Wiring diagram of the installation of the Filser ATR 833 radio
Fig. 13. Wiring diagram of the installation of the PTT buttons
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
Fig. 14. Wiring diagram for MGL E-1 engine instruments installation
Fig. 15. Wiring diagram for installation of the strobe lights
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
2.9 Seats and harness belts
The airplane is equipped with adjustable seats with soft cushions. The seats are attached to two transverse beams inside fuselage. The harness belts are of the 4-point type. Two shoulder belts are passed over the shoulders from behind and are joined to the waist belts with adjustable buckles. The lock is attached to the waist belts.
Before climbing into the cockpit the pilots should adjust the seat position. After getting into the seats the pilots should fasten the belt locks and adjust the belts to their size.
The seats and harness belts properly adjusted and fastened do not restrict pilot motions necessary to control the airplane and ensure pilots' safety in flight and during airplane motion on the ground.
2.10 Cockpit doors
The cockpit doors consist of organic glass, attached to the metal tubular framework. The doors are hinged on top and open upward. In their open and closed position the doors are retained by pneumatic cylinders. Each door can be fixed in the closed position with a lock.
Both left and right doors have air scoops for ventilation, de-misting of the glass and providing pilot view for landing in poor visibility conditions (snow, rain, etc.).
2.11 Baggage container
The baggage container is located behind the pilot seats and is easily accessible from inside of the cockpit
– on ground and in flight as well. The container is a soft bag fixed on a rigid framework. The container has an opening clap with a zipper. The weight of baggage in the container may not exceed 20 kg (44 lb).
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
2.12 Recovery system
A-22L2 can be optionally equipped with MAGNUM 501 Light Speed Soft parachute recovery system. The system is intended for rescue of pilots in case of emergency
situation in flight when emergency landing is not possible (see section 6.5).
Recovery system installation in the airplane is shown on Fig. 16. Parachute in a soft pack
1 is located behind the baggage container on the right side of fuselage. The system is actuated by pulling the deployment handle 2 connected with the cable 3 to the rocket container 4. Then the rocket fires and pulls out the parachute connected with the lanyard 5 via the latch ring 6 and cables 7, 9 to the attachment points 8 and 10 on fuselage structure. Position of the attachment points and length of the cables is selected so that the airplane is suspended in a certain (wings-level nose-down) attitude when descending with the parachute open. This attitude ensures higher degree of safety for pilots during emergency landing although the aircraft structure is likely to be damaged when absorbing the landing shock.
Fig. 16
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
3 Operating Limitations
3.1 General
Section 2 includes operating limitations, instrument markings, and basic tables necessary for safe operation of the airplane, its engine, systems and equipment.
3.2 Airspeed
Airspeed limitations and their operational significance are shown in the table below. All speed values are given for the maximum takeoff weight.
Speed
V
NE
- never exceed speed
V
RA
- rough speed
CAS, km/h
(kts)
210
(113)
IAS, km/h
(kts)
Remarks
216
(116.5)
Do not exceed this speed in any operation
160 (86) 161 (87) Do not exceed this speed in gust condittions
V
A
- max. maneuvering speed
Do not make full or abrupt control movement above
150 (81) 150 (81) this speed, because under certain conditions the airplane may be overstressed by full control movement
V
FE
- max. flap extended speed
115 (62)
V
S1
- stalling speed, flaps up
V
S0
- stalling speed, full flaps
112
(60.5)
Do not exceed this speed with flaps extended
70 (38) 63 (34) At maximum takeoff weight and engine at idle
60 (32) 52 (28) At maximum takeoff weight and engine at idle
3.3 Crosswind limitation
Maximum crosswind component for A-22L2 airplane is 7 m/s (14 kts).
It is highly recommended to choose upwind direction for takeoff and landing with the least crosswind. It will significantly shorten takeoff and landing distances and increase degree of safety.
3.4 Service ceiling
Service ceiling of A-22L2 depends on the engine type and is equal to at least:
Rotax-912UL: 4000 m (13 115 ft)
Rotax-912ULS: 5000 m (16 393 ft)
However A-22L2 has nor pressurized cockpit neither oxygen equipment and therefore may not be used for high-altitude flight.
3.5 Maneuvering load factors
Limit load factors for the airplane at gross weight of 472,5 kg (1042 lb) are as follows:
Maximum positive limit load factor +4.0
Maximum negative limit load factor -2.0
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
3.6 Prohibited maneuvers
A-22L2 airplane belongs to a non-aerobatic category. All maneuvers shall be done within its airspeed and load factor limits (G limits). Any aerobatics including intentional spinning is prohibited.
3.7 Operating weights and loading
Maximum takeoff weight: 472,5 kg (1042 lb)
Empty weight: according to actual weighing
Maximum baggage weight (in container): 20 kg (44 lb)
Permissible CG range: 19 to 33 % of wing MAC (mean aerodynamic chord)
The airplane may be flown by 1 or 2 pilots. Total weight of pilots, fuel and baggage may not exceed the maximum useful load (maximum takeoff weight less actual empty weight).
3.8 Engine
Engine data and operational limitations are given in the table below:
Engine manufacturer:
Engine model:
Engine type:
Maximum takeoff power:
Time limit at full power:
Max. revolutions (no time limit)
Min. revolutions at idle
Maximum coolant temperature at pick-up point:
Oil temperature, normal minimum maximum
Exhaust gas temperature:
- maximum at takeoff
- maximum
- normal
Oil pressure, normal minimum maximum
Fuel pressure, normal maximum
Fuel:
Oil:
Ambient air temperature range
BOMBARDIER-Rotax-GmbH (Austria)
Rotax-912UL Rotax-912ULS
80 h.p.
Flat-four, four-stroke
100 h.p.
5 min (5800 rpm)
5500 rpm
1400 rpm
120
°C (248°F)
90-110
ºC (190-250 ºF)
50 ºC (120 ºF)
140 ºC (285 ºF)
90-
110 ºC (190-250 ºF)
50 ºC (120 ºF)
130 ºC (266 ºF)
880 ºC (1620 ºF)
850 ºC (1560 ºF)
800 ºC (1470 ºF)
2,0-5,0 bar (29-73 psi) (above 3500 RPM)
0,8 bar (12 psi) (below 3500 RPM)
7 bar (100 psi) (at cold start, allowed for a short time)
0,15-0,4 bar (2,2-5,8 psi)
0,4 bar (5,8 psi) unleaded mogas min. RON 95 any automotive oil of API classification “SF” or “SG” from -
25 ºC to +50 ºC
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
NOTE: On all issues of engine operation see Rotax engine Operator's Manual.
Follow its instructions to ensure safe and efficient operation of the engine.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
4 Weight and balance
4.1 General
This section contains information about weight and balance requirements for the safe operation of the airplane. It is responsibility of the pilot in command to ensure before every flight that weight and balance of the airplane remains within the specified limits. Failure to do so may cause deterioration in airplane's flight performance and stability characteristics and, as consequence, lead to unsafe operation.
4.2 Actual empty airplane weight and CG position
Every airplane may have configuration different from the basic standard depending upon the equipment installed. After final assembly each airplane is weighed and its weight and balance data (actual empty weight, CG position) as well as installed equipment list are recorded for future use. If any airplane equipment is replaced or installed additionally this may affect the weight and balance data therefore the airplane weighing must be repeated to determine the new weight and balance data that must be recorded in this manual. It is responsibility of the airplane owner to keep actual empty weight records and valid list of installed equipment for his airplane.
The actual empty airplane weight may be determined by weighing the empty airplane with wings and fuselage level using the appropriate scales placed under the nose and main wheels.
Empty airplane CG position from datum (engine flange) may be determined using the following formula:
X
AE
= (W
NW
·X
NW
+ W
MW
·X
MW
) / (W
NW
+ W
MW
), where W
X
NW
W
MW
MW
– load (weight) on the nose wheel,
X
NW
= -
… m (… in) – position of the nose wheel,
– total load (weight) on the main wheels,
= … m (… in) – position of the main wheels.
Computation must be performed in the same system of units: either kg-m or lb-in.
4.3 Computation of the CG position before flight
Before every flight pilot in command must make sure that the airplane takeoff weight and
CG are within the specified safe limits. The airplane CG position from datum (engine flange) may be determined using the following formula:
X
CG
= (W
AE
·X
AE
+ W crew
·X crew
+ W fuel
·X fuel
+ W bag
·X bag
) / (W
AE
+ W crew
+ W fuel
+ W bag
), where W
AE
– actual empty weight of the airplane (see section 10.6),
X
AE
– CG position of the empty airplane (see section 10.6),
W crew
– total weight of pilots,
X crew
= 1.6 m (63 in)
– position of pilots' CG,
W fuel
X fuel
– total weight of fuel in the tanks,
= 2.0 m (78.7 in)
– position of fuel tank CG,
W bag
– weight of the baggage in the baggage container,
X bag
= 2.3 m (90.6 in)
– position of the baggage CG.
Computation must be performed in the same system of units: either kg-m or lb-in.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
Note: the airplane CG position datum (engine flange) must be between 1.5 m (59.1 in) and
1.7 m (66.9 in) i.e. between 19% and 33% of the wing MAC (mean aerodynamic chord) see Fig/ 17.
Fig. 17.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
5 Performance
5.1 General
This section contains performance data of A-22L2 airplane of standard (basic) configuration at maximum takeoff weight in the following environmental conditions: ICAO standard atmosphere (ISA), mean sea level (MSL), no wind, hard and even runway. Those data may vary depending upon the configuration and technical condition of a particular aircraft and actual environmental conditions of its operation.
5.2 Takeoff and landing distances
The minimum takeoff and landing distances of A-22L2 for the above conditions are specified in the table below. However pilots should always keep in mind that actual takeoff and landing distances depend on condition of the aircraft, environment and pilot skill.
Engine
Takeoff run
Landing run
Takeoff distance to/from 15 m (50 ft)
Landing distance to/from 15 m (50 ft)
Rotax-912UL Rotax-912ULS
135 m (443 ft) 105 m (344 ft)
135 m (443 ft) 135 m (344 ft)
250 m (1272 ft) 215 m (1092 ft)
350 m (443 ft) 350 m (344 ft)
5.3 Climb performance
The rate of climb depends on atmospheric conditions, airplane takeoff weight, flap setting and engine type. The climb performance data of A-22L2 in ISA conditions at MSL, maximum takeoff weight is at least 3 m/sec.
5.4 Level flight at cruising speed
The cruising speed of level flight is 180 km/h (97 kts) at 5400 RPM.
5.5 Endurance
The maximum flight endurance of the aircraft at a low altitude and full fuel tanks (90 l or
23.8 US gal) is equal to 10 hours.
5.6 "Bug" effect
Bugs and raindrops affect the aircraft performance insignificantly but as there is no wiper on the windscreen they impair the visibility in flight.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
6 Emergency procedures
6.1 General
This section contains recommendations to the pilots in case of emergency in flight.
However such situations, caused by airframe or engine malfunction are extremely rare provided that pre-flight inspections and checks are made regularly.
6.2 Engine failure
6.2.1 During takeoff roll
1. Throttle
– IDLE.
2. Ignition
– OFF.
3. Brakes
– APPLY as necessary.
6.2.2 Immediately after takeoff
1. Direction
– NO TURN BACK.
2. Airspeed
– 100 KM/H (54 KTS) - best glide.
3. Throttle
– IDLE.
4. Ignition
– OFF.
5. Master switch
– OFF.
6. Fuel valves
– CLOSE.
7. Landing
– STRAIGHT AHEAD, avoid colliding with obstacles.
6.2.3 During climb
1. Airspeed
– 100 km/h (54 kts) - best glide.
2. Throttle
– IDLE.
3. Ignition
– OFF.
4. Fuel valves
– CLOSE.
5. Direction
– TURN to the airfield (if altitude permits).
6. Landing
– STRAIGHT AHEAD, avoid colliding with obstacles.
6.2.4 In flight
1. Airspeed
– 100 km/h (54 kts) - best glide.
2. Landing area
– SELECT (consider altitude and wind).
3. Engine
– RESTART (if time and altitude permit), see section
4. Unable to restart
– follow forced landing procedure, see section
6.5
.
6.3 Glide
1. Recommended glide speed
– 100 km/h (54 kts) - flaps up, 90 km/h (49 kts) - flaps down.
2. Best glade ratio
– 10 (flaps up).
3. Minimum sink rate
– 3 m/s (590 fpm).
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
6.4 Restarting engine in flight
1. Throttle
– IDLE.
2. Fuel valves
– check OPEN.
3. Fuel level
– CHECK.
4. Ignition
– ON.
5. Master key
– turn to START.
6.5 Emergency landing
1. Glide speed
– 100 km/h (54 kts).
2. Flaps
– position 1.
3. Ignition
– OFF.
4. Fuel valves
– CLOSE.
5. Landing area
– SELECT, consider altitude and wind. (No place suitable for landing – use recovery system
– if it is installed.)
6. Emergency call
– TRANSMIT (121.5 MHz or nearest airfield frequency).
7. Flaps
– EXTEND FULLY on final.
8. Landing
– in the SELECTED place, avoid colliding with obstacles.
9. Touchdown
– at minimum speed.
6.6 Smoke and fire
6.6.1 On ground
1. Ignition
– OFF.
2. Fuel valves
– CLOSE.
3. Unfasten seat belts, abandon cockpit.
4. Take measures to extinguish the fire or stop formation of smoke.
6.6.2 During takeoff
1. THROTTLE
– IDLE
2. Ignition
– OFF.
3. Fuel valves
– CLOSE.
4.
Before liftoff
– discontinue takeoff, use brakes as necessary.
5.
After liftoff
– discontinue takeoff, land right ahead avoiding collision with obstacles.
6. Unfasten seat belts, abandon cockpit.
7. Take measures to extinguish the fire or stop formation of smoke.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
6.6.3 In flight
1. Ignition
– OFF.
2. Fuel valves
– CLOSE.
3. Yoke
– PUSH to descend.
4. Speed
– below 210 km/h (113 kts).
5. Landing area
– SELECT (consider altitude and wind).
6. Landing
– in the SELECTED place, avoid colliding with obstacles.
7. Unfasten seat belts, abandon cockpit.
8. Take measures to extinguish the fire or stop formation of smoke.
6.7 Recovery from unintentional stall and spin
1. Rudder pedals
– FULLY AGAINST ROTATION.
2. Yoke
– PUSH slightly forward of neutral.
3. Rotation stopped
– rudder pedals NEUTRAL.
4. Speed reached 100 km/h (54 kts)
– PULL YOKE GENTLY to recover from diving.
Do not exceed +4g and 210 km/h (113 kts)!
WARNING: Intentional spinning in A-22L2 is prohibited!
NOTE: In level flight and during turn stall warning is assured by the aerodynamic characteristics of A-22L2
– gentle shaking of the airplane and yoke due to the starting airflow separation.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
7 Normal Procedures
7.1 General
This section describes normal procedures recommended for safe operation of the A-22L2.
7.2 Preflight check
Pilots must inspect the general condition of the airplane during its preflight check. The airplane must have no damage or maladjustments that may be critical for the flight safety.
The cockpit glass, propeller, wing and empennage must be clean of rainwater, snow, frost, ice, and dirt as they impair visibility and aerodynamics and increase weight.
Preflight check must be performed according to the following order and requirements:
7.2.1 Entire airplane
1. Covers and clamps
– REMOVED.
2. Airplane
– CLEAN of rainwater, snow, frost, ice and dirt.
3. Airplane rigging
– CHECK visually.
4. External damage
– NONE.
7.2.2 Power plant
1. Propeller and spinner
– CLEAN, INTACT and SECURE.
2. Top cowling
– REMOVE for engine inspection.
3. Oil, coolant and braking fluid
– CHECK level.
4. Engine mount and vibration dampers
– NO CRACKS and INTACT.
5. Cables and hoses
– INTACT and SECURE.
6. Fuel, oil, coolant leaks
– NONE.
7. Exhaust system, its attachments, joints and springs
– NO CRACKS and INTACT.
8. Top cowling
– INSTALL back.
9. Cowling and its locks
– INTACT and LOCKED.
7.2.3 Landing gear
1. Wheel fairings
– CLEAN, INTACT and SECURE.
2. Wheel pressure
– OK.
3. Tires
– NO CRACKS, WEAR OK.
4. Main wheel brakes
– CLEAN, INTACT and SECURE.
5. Braking fluid
– NO LEAKS.
6. Nose and main legs
– NO CRACK and INTACT.
7. Nose leg shock absorber
– INTACT.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
7.2.4 Right wing
1. Wing and strut surface
– CLEAN and INTACT.
2. Wing and strut attachment fittings and bolts
– IN PLACE, INTACT and SECURE.
3. Wing fuel tank cap
– IN PLACE and SECURE.
4. Fuel leaks
– NONE.
5. Fuel tank vent outlet
– CLEAN and INTACT.
6. Wing tip and navigation/strobe light
– INTACT.
7. Flaperon
– CLEAN and INTACT.
8. Flaperon hinge brackets
– INTACT, BOLTS SECURE, HINGES GREASED.
9. Flaperon control linkage attachment
– INTACT and SECURE.
7.2.5 Right side of fuselage
1. Fuselage surface
– CLEAN and INTACT.
2. Cockpit glass
– CLEAN, INTACT and NO CRACKS.
3. Door hinges and lock
– INTACT.
4. Recovery system condition
– CHECK visually.
5. Drain valve
– CLOSED, NO FUEL LEAKS.
6. Fuel residue
– DRAIN and CHECK.
7.2.6 Empennage
1. Empennage surface
– CLEAN and INTACT.
2. Horizontal stabilizer attachment fittings and bolts
– INTACT and SECURE.
3. Rudder, elevator and trim tab
– CLEAN and INTACT.
4. Rudder, elevator and trim tab hinge brackets
– INTACT, SECURE and GREASED.
5. Rudder, elevator and trim tab control linkage attachment
– INTACT and SECURE.
7.2.7 Left side of fuselage
1. Fuselage surface
– CLEAN and INTACT.
2. Cockpit glass
– CLEAN, INTACT and NO CRACKS.
3. Door hinges and lock
– INTACT.
4. Battery and power cables' attachment
– SECURE, CONDITION OK.
5. Control system linkages inside the rear fuselage
– CHECK visually.
6. Baggage container condition
– CHECK visually.
7.2.8 Left wing
1. Flaperon control linkage attachment
– INTACT and SECURE.
2. Flaperon hinge brackets
– INTACT, BOLTS SECURE, HINGES GREASED.
3. Flaperon
– CLEAN and INTACT.
4. Fuel tank vent outlet
– CLEAN and INTACT.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
5. Fuel leaks
– NONE.
6. Wing fuel tank cap
– IN PLACE and SECURE.
7. Wing tip and navigation/strobe light
– INTACT.
8. Wing and strut attachment fittings and bolts
– IN PLACE, INTACT and SECURE.
9. Wing and strut surface
– CLEAN and INTACT.
10. Pitot/static pressure probe
– COVER REMOVED, CLEAN and INTACT.
7.2.9 Cockpit
1. Cockpit interior
– CLEAN, INTACT, NO FOREIGN OBJECTS.
2. Seats
– INTACT, ADJUSTED and SECURE.
3. Harness belts
– INTACT, ADJUSTED and LOCKED (with pilots in the seats).
4. Doors
– CLOSED and LOCKED.
5. Flight planning including weight and CG check
– PERFORMED.
6. Onboard documentation/maps required for the flight
– AVAILABLE.
7. Baggage container
– BAGGAGE SECURED, CONTAINER CLOSED.
8. Starter key
– REMOVED
9. All electric switches
– OFF.
10. Flight instruments
– INTACT, CHECK READINGS.
11. Yoke fixing pin
– REMOVE.
12. Movements of controls
– check FREE and FULL.
13. Yokes, rudder pedals, elevator trim tab lever
– NEUTRAL.
14. Flaps
– RETRACTED.
15. Parking brake
– ON.
16. Recovery system (if installed) safety pin
– REMOVE.
7.3 Engine starting
1. Starter key
– INSERT, set to ON.
2. Fuel level
– CHECK.
3. Fuel valves
– CHECK.
4. Throttle
– IDLE.
5. Doors
– check CLOSED.
6. Carburetor heating
(if necessary)
– ON.
7. Choke lever
(cold engine only)
– set FULLY FORWARD.
8. Propeller
– CHECK CLEAR.
9. Starter key
(cold engine only)
– set to START for 5 seconds with ignition OFF.
10. Ignition
– ON.
11. Starter key
– set to START until engine starts (10 seconds maximum).
12. Throttle
– set MINIMUM STABLE REVOLUTIONS (approx. 1900-2100 RPM).
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AEROPRAKT-22L2 Pilot Operating Handbook
13. Choke lever
– FULLY BACK (gradually, when engine runs smoothly).
14. Engine
– WARM UP at 2000-2500 RPM.
15. Required electrical equipment/instruments
– switch ON and ADJUST.
16. Ignition
– TEST at 4000 RPM holding brakes.
17. Oil pressure
– check 2,0-5,0 bar (29-73 psi) at above 3500 RPM.
A22L2-POH-02
7.4 Taxiing
1. Throttle
– IDLE.
2. Parking brake
– OFF.
1. Coolant and oil temperature
– CHECK.
3. Taxiway
– CHECK CLEAR.
4. Throttle
– SET REQUIRED TAXI SPEED.
5. Yoke
– elevator NEUTRAL, ailerons AGAINST crosswind.
6. Brakes
– use as required, set throttle to IDLE when stopping.
7. To stop immediately
– IGNITION OFF and ENGAGE BRAKES.
7.5 Before takeoff
1. Hold position
– OCCUPY.
2. Brakes
– ENGAGE.
3. Coolant temperature
– CHECK minimum 60°C (140°F).
4. Oil temperature
– CHECK minimum 50°C (120°F).
5. Fuel level
– CHECK.
6. Fuel valves
– CHECK.
7. Flaps
– EXTEND position 1.
7.6 Normal takeoff
1. Line up position
– OCCUPY.
2. Rudder pedals
– NEUTRAL.
3. Brakes
– RELEASE.
4. Throttle
– gradually FULL POWER.
5. Yoke
– elevator NEUTRAL, ailerons AGAINST CROSSWIND.
6. Rudder pedals
– maintain takeoff direction.
7. Yoke
– PULL gently to lift the nose wheel at 40 km/h (22 kts).
8. Liftoff
– at 80 km/h (44 kts).
9. Accelerate to at least 100 km/h (54 kts) at 3-5 m (9-15 ft) and start to climb.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
7.7 Short field takeoff
1. Flaps
– EXTEND FULLY.
2. Hold position
– OCCUPY.
3. Takeoff distance
– CHECK if sufficient.
4. Rudder pedals
– NEUTRAL.
5. Throttle
– gradually FULL POWER.
6. Brakes
– RELEASE.
7. Yoke
– elevator NEUTRAL, ailerons AGAINST CROSSWIND.
8. Rudder pedals
– maintain takeoff direction.
9. Yoke
– PULL gently to lift the nose wheel at 40 km/h (22 kts).
10. Liftoff
– at 65 km/h (35 kts).
11. Accelerate to at least 90 km/h (54 kts) at 3-5 m (9-15 ft) and start to climb.
12. Speed
– SET best angle of climb speed V
X
= 90 km/h (49 kts).
7.8 Climb
1. Speed
– SET: best angle of climb speed V
X
= 90 km/h (49 kts) or best rate of climb speed V
Y
= 100 km/h (54 kts) in strong turbulence +10 km/h (+5 kts).
2. Flaps
– RETRACT SLOWLY at safe altitude.
3. EGT
– max. 850ºC (1560ºF).
4. CHT
– max. 120ºC (248 ºF).
5. Oil pressure
– max. 5,0 bar (73 psi).
7.9 Cruise
1. Flight altitude
– OCCUPY and monitor, in strong turbulence – at least 100 m (300 ft).
2. Cruise speed
– SET, in strong turbulence – min. 100 km/h (54 kts), max.150 km/h (81 kts).
3. Elevator trim tab
– ADJUST as required.
4. Fuel level
– MONITOR.
5. Fuel valves
– check OPEN for fuel tank with fuel, CLOSE empty fuel tank.
6. Turns
– perform with caution in strong turbulence and at low altitudes.
7.10 Approach
1. Speed
– REDUCE below 154 km/h (83 kts), minimum 100 km/h (54 kts).
2. Flaps
– EXTEND position 1. Wind stronger 8 m/s (16 kts) – FLAPS UP.
3. Elevator trim tab
– ADJUST as required.
4. Approach speed on final
– 100 km/h (54 kts), +10 km/h (+5 kts) in rain or strong turbulence.
5. Too high on final
– REDUCE RPM to idle, SLIP if necessary.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
6. Too low on final
– INCREASE RPM.
DO NOT RETRACT FLAPS when flying low over high obstacles or close to the ground!
7.11 Normal landing
1. Direction
– ALIGN the airplane WITH THE RUNWAY using rudder pedals.
2. Side drift
– ELIMINATE by banking against the drift (crosswind, if any).
3. Flare
– start at 5 m (15 ft), level off at approximately 0.3 m (1 ft).
Gradually reduce bank and side drift while flaring and leveling off.
4. Throttle
– IDLE.
5. Touchdown
– at minimum speed. In cross-wind conditions – maintain banking into wind till touching the runway with one of the wheels.
Avoid touching ground with the tail.
6. Yoke
– HOLD to reduce the speed and PUSH gently to lower the nose wheel slowly.
Pedals
– set NEUTRAL before touching ground with the nose wheel (in cross-wind conditions).
7. Brakes
– ENGAGE as required.
Avoid braking at a high speed or nose wheel up!
8. Flaps
– RETRACT.
7.12 Short field landing
1. Flaps
– EXTEND FULLY.
2. Approach distance
– REDUCE by side slipping when clear of obstacles.
3. Approach speed on final
– 90 km/h (49 kts), +10 km/h (+5 kts) in rain or strong turbulence.
4. Direction
– ALIGN the airplane WITH THE RUNWAY using rudder pedals.
5. Side drift
– ELIMINATE by banking against the drift (crosswind, if any).
6. Flare
– start at 5 m (15 ft), level off at approximately 0.3 m (1 ft).
Gradually reduce bank and side drift while flaring and leveling off.
7. Throttle
– IDLE.
8. Touchdown
– at minimum speed at the beginning of the runway. In cross-wind conditions
– maintain banking into wind till touching the runway with one of the wheels.
Avoid touching ground with the tail.
9. Flaps
– RETRACT.
10. Yoke
– HOLD to reduce the speed and PUSH gently to lower the nose wheel slowly.
Pedals
– set NEUTRAL before touching ground with the nose wheel (in cross-wind conditions).
11. Brakes
– ENGAGE as required.
Avoid braking at a high speed or nose wheel up!
7.13 Balked landing
1. Throttle
– gradually FULL POWER.
2. Descent
– DISCONTINUE.
3. Speed
– accelerate to at least 100 km/h (54 kts) flying level.
4. Climb
– at 100 km/h (54 kts).
5. Flaps
– RETRACT SLOWLY at safe altitude.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
8 Aircraft Ground Handling and Servicing
8.1 General
This section contains recommendations on aircraft ground handling and servicing important for safe and efficient operation of this aircraft. Besides owners/pilots should keep contact with the aircraft manufacturer in order to obtain in time all service bulletins relevant to their aircraft.
8.2 Servicing fuel, oil and coolant
Pilots must check level of fuel, oil and coolant during preflight checks.
Use only those grades of fuel, oil and coolant that are recommended by the Rotax engine operation manual.
Fuel tank inlets in A-22L2 are not fitted with a fuel filter/strainer therefore fuel must be filled into the tanks using fuel pumps or/and funnels with a fine mesh.
Fuel residue must be drained regularly from the tanks via the drain valve into a clean transparent container for checking.
WARNING: At all times take care not to spill fuel on the cockpit glass
– fuel may cause glass dimness and cracks.
When checking oil and coolant level follow the instructions of the Rotax engine operation manual.
If the engine is not operated for long time, oil from the engine will flow to the lowest point of the lubrication system, i.e. oil tank. So before checking the oil level on the cold engine open the oil tank, remove and clean the oil probe and turn the propeller several times until you hear the sound of air bubbles coming into the oil tank which means that the oil from the oil tank was pumped thus into the engine forcing the air from it back into the oil tank.
Wait a little while the oil lets out the air bubbles and insert the oil probe to see the actual oil level.
WARNING: Do not turn the propeller against the direction of engine rotation
– this may damage the engine.
CAUTION: Do not open the expansion tank of the cooling system while engine is hot!
Coolant is under pressure and may burst out and bring injuries or harm.
8.3 Towing and tie-down instructions
A-22L2 may be towed manually or using any suitable towing device (towing block, car, etc.).
Before towing the airplane, make sure that the parking brake is off and the wheels are not blocked by chocks or anything else.
When towing use strong areas of the airplane structure for pulling/pushing, e.g. propeller blades near the spinner, wing struts near their attachment points, nose wheel axle for attaching a towing bar.
For easier towing the airplane backwards hold it by the leading edge of the fin or stabilizer near their forward attachment points and press the tail down to lift the nose wheel up.
Before doing this, make sure that there is no heavy load in the cockpit.
Tie the airplane down with its nose into the wind (preferably) or at least across the wind but never tail to the wind to avoid damaging the control surfaces.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
For tying the airplane down use the wing struts near their attachment points to the wing and propeller shaft.
Fix the yoke/stick with the locking pin and suitable gust locks to fix the ailerons and elevator when the airplane is tied down outside.
WARNING: Never use the locking pin alone fixing the stick without the universal gust locks securing the ailerons when airplane is parked outside!
When storing the airplane outside it is recommended to protect the cockpit glass with suitable covers.
Never left the cockpit doors open even for a shortest time in a windy weather! Wind may shut the door abruptly and damage it.
8.4 Airplane washing
Keeping the aircraft clean is essential for its efficient and safe operation.
Pilots must make sure during the preflight check that the airplane is clean and free of corrosion.
Airplane washing should be done using cloth or soft sponge abundantly soaked in water with addition of mild washing agents.
Never use gasoline, solvents or other aggressive liquids for washing the airplane and especially the cockpit glass!
Cockpit glass must be finally washed with plenty of water. It is recommended to let water dry and not to wipe it with a cloth as dust particles stuck in the cloth may scratch the glass.
After airplane washing inspect the parts that must be protected from corrosion (hinges, joints, etc.). Clean them of any remaining water and old grease and lubricate anew.
8.5 Disassembling and assembling the airplane
Aircraft operation and servicing in some cases may require to disassemble (and assemble back) the airplane or remove some of its components. This section describes how to disassemble correctly the airplane by removing its main components: left and right wings, horizontal tail, propeller, engine.
8.5.1 Wing removal
Left and right wings shall be removed in turn (in any order) according to the following
1. Disconnect the flaperon control shaft.
2. Disconnect the electric connectors of fuel level sender cable and strobes (if installed).
3. Disconnect the fuel lines.
4. Disconnect the full and static pressure lines at their joints (left wing, see Fig. 10).
5. Remove the wing strut brace by disconnecting it from the wing and fuselage while holding the wing.
6. Disconnect the wing at its forward and rear attachment points.
After disconnecting the wings it is recommended to insert all the fasteners back and lock them with safety wire or pins not to loose them. Also secure with safety wire the spherical bearings in the forward and rear wing attachment fittings.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
Fig. 18 Wing removal
8.5.2 Stabilizer removal
Remove the stabilizer (see fig. 19) as follows:
1. Disconnect the control cable from the trim tab arm.
2. Disconnect the rudder rod from the elevator arm.
3. Undo the nut from the rear attachment bolt
4. Unfasten the forward bolts of horizontal tail attachment to fuselage and remove the stabilizer.
Insert all fasteners back and secure them.
fig. 19. Disconnection of the horizontal tail
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
8.5.3 Propeller removal
Before dismantling the engine from the aircraft remove the propeller as follows:
- undo nuts and remove the attachment bolts;
- remove the propeller by pulling gently by its hub.
When installing the engine on the aircraft propeller should be installed in reversed order.
Disassembled propeller should be carried in a soft package.
8.5.4 Engine removal
Engine removal shall be done in the following order:
- remove the engine cowling panels;
- drain the cooling liquid and close all drain openings with plugs;
- remove the water cooler;
- drain the oil and close all drain openings with plugs;
- remove the oil cooler;
- disconnect electrical system cables (connector is installed on the firewall);
- disconnect the throttle and choke control cables;
- disconnect fuel lines;
- drain the fuel from the float chambers of the carburetors;
- remove the exhaust pipes and muffler;
- remove the split pins from engine mount attachment studs;
- undo the nuts, take out the bolts and remove the engine.
Engine installation should be performed in reversed order. After installation of the engine install the propeller on it.
NOTE: Before wing removal empty the wing tanks!
8.5.5 Aircraft assembling
Aircraft assembling must be done in exactly reversed order. When installing the horizontal tail it is necessary to lead the trim tab control cable first through its conduit in the stabilizer.
All hinges and fittings must be cleaned and greased before assembling the aircraft.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
9 Required Placards and Markings
9.1 Airspeed indicator markings
Scheme of color markings of airspeed indicator is shown on Fig. 20. Explanations are
given in the table below:
Marking
IAS range or value, km/h (kts)
White arc 57 - 112 (31
– 60.5)
Green arc 69 - 161 (37.5 - 87)
Yellow arc
161 - 216 (87
–
116.5)
Yellow line
Red line
150 (81)
216 (116.5)
Significance
Positive flap operating range
Normal operating range
Maneuvers must be conducted with caution and only in smooth air
Design Manoeuvre Speed
Maximum speed for all operations
Fig. 20
9.2 Miscellaneous placards and markings
All instrument panel markings are shown on Fig. 9 of the section 2.7.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
10 Supplements
10.1 General
This section contains information concerning the particular configuration of this airplane
(list of installed equipment) along with its actual empty weight and balance data. Any additional manuals for the installed equipment are indicated here.
10.2 Engine manual
A separate engine manual is supplied with every aircraft. On all issues concerning the engine operation and service airplane owner/pilot must consult the engine manual and strictly follow its instructions to ensure safe operation of the aircraft.
10.3 Avionics and special engine instruments
This airplane may be equipped with some optional avionics and special engine instruments. In that case the airplane is supplied with the manuals for that kind of equipment or special instruments. Airplane owner/pilot must follow the instructions of those manuals and respective subsections of this manual to ensure safe and efficient operation of the airplane.
10.4 Recovery system
This airplane may be equipped with a parachute recovery system on customer's request.
In that case the airplane is supplied with an operation manual for the recovery system.
Airplane owner/pilot must follow the instructions of the recovery system manual and respective subsections of this manual to ensure safe operation of the recovery system installed in the airplane.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
10.5 List of installed equipment
All equipment installed or replaced in this airplane must be listed in the table below.
No.
1.
Description Installed by Date Signature Remarks
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
10.6 Actual empty weight and CG position data
This subsection contains information about the actual empty weight and respective CG position of the airplane. After final assembly, major repair/overhaul, replacement and/or additional installation of any equipment the aircraft must be weighed and respective weight and balance data recorded in the table below:
Empty weight CG position Weighed by Date Signature Remarks
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
10.7 Flight Training Supplement
Flight training on Aeroprakt-22L2 airplane foresees 5 hours of flying in accordance with the normal flight procedures, described in Pilot Operating Handbook (POH).
It covers the following:
1. Preflight preparation including determining the takeoff mass and airplane CG position, preflight check and preflight servicing of the airplane.
2. Airfield traffic and flight to the training area.
3. Airfield circuit flight.
4. Balked landing.
5. Low speed flight, recognizing the starting and ongoing stall and stall recovery.
6. High speed flight, recognizing and recovery from steep diving spiral.
7. Short field takeoff and landing with overflying obstacles.
8. Crosswind takeoff and landing.
9. Flights with imitated engine failure.
10.7.1 Preflight preparation
Preflight preparation includes preflight check and determining the takeoff mass and CG position of the airplane. It shall be done in accordance with the sections 4.3 and 7.2 before every flight.
10.7.2 Airfield traffic and flight to the training area
To adapt to the airplane controllability and flight characteristics a flight (its elements are described in the POH) shall be performed that includes the following: a) Level flight at various airspeeds and engine power settings.
Elevator trim tab shall be used for trimming the airplane in pitch. b) Climb at various airspeeds and full power of the engine.
Elevator trim tab shall be used for trimming the airplane in pitch. c) Descending at various airspeeds, flap settings and minimum engine power.
Elevator trim tab shall be used for trimming the airplane in pitch. d) Turns to the left and to the right at various speeds and bank angles.
Total flight time
– 40 minutes. Number of flights – 2. Number of landings – 2.
10.7.3 Airfield circuit flight
Airfield circuit flight shall be performed for familiarization with the main flight elements, as well as takeoff and landing. It consists of the following:
1. Before starting the engine, the door locks shall be checked along with the harness belts, elevator trim tab lever, parking brake and carburetor heating knob; flaps shall be set to 1st position, choke lever shall be moved forward (if the engine is cold), then the master switch and strobes shall be turned on. Fuel level and position of the fuel valves (at least one must be open) shall be checked. Then set the ignition switches to ON and start the engine. After engine begins to run smoothly the choke lever shall be moved back (if it was used). Then switch ON the radio and check communication. After engine is warmed to the required temperature ignition system check shall be done. Before taxiing the parking brake must be set to OFF.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
2. Taxiing is described in the section 7.4. Airfield traffic shall be performed in accordance with the airfield traffic diagram. Before lining up full and free movements of the flight controls must be checked.
3. After lining up the engine power setting shall be increased to full and takeoff shall be performed. The takeoff procedure is described in the section 7.6.
4. Upon reaching the speed of climb of 100 km/h (54 kts) the flaps shall be retracted at safe altitude. The pitch retrimming and loss of altitude at that are insignificant. The crosswind turn shall be performed during climb after reaching 100 m (300 ft) altitude.
5. Climb is described in the section 7.7. Upon climbing to 200 m (600 ft) the airplane shall be set to level flight. The engine speed shall be reduced to 4000-4200 RPM so that the airspeed of level flight sets in the range of 120-140 km/h (65-76 kts). Then the downwind turn shall be performed with the bank angle up to 30°.
6. Between downwind and base turn the elevator trim tab shall be adjusted, if necessary, and engine parameters shall be checked.
7.
It is recommended to perform the base turn with a bank angle below 30° in a place where the distance remaining for descend after the final turn is equal to at least 1000 m
(3000 ft).
8. After making the base turn it is necessary to reduce the engine speed to 3000 RPM, reduce the airspeed to 120 km/h (65 kts) and extend the flaps to 1st position. In this case a nose-down pitching moment appears that shall be countered by pulling the yoke back. Then the airspeed must be reduced to 100 km/h (54 kts) and engine speed adjusted so that in the beginning of the final turn the airplane is at approximately 150 m
(500 ft).
9.
It is recommended to make the final turn with a bank angle below 20°. While making the final turn its radius may be corrected by changing the bank angle in order to ensure airplane aligning with the runway after the turn. It is recommended to keep the airspeed in the range of 90-100 km/h (49-54 kts).
10. The required descend angle on final shall be set by adjusting the engine RPM. When engine RPM is increased a slight nose-up pitching moment occurs that shall be countered by pushing the yoke forward. When engine RPM is reduced the effect is opposite. Heading corrections shall be done using rudder pedals. Lateral deviations shall be corrected with S-turns with appropriate bank angles. Recommended airspeed on final 90-110 km/h (49-59 kts).
11. At about 5 m (15 ft) the engine shall be set to idle and airspeed and sink rate reduced by pulling the yoke back gradually so that at the moment of touchdown the airplane reaches the pitch angle required for landing (the top of the engine cowling is slightly higher than the horizon sightline).
12. Direction of the landing roll shall be controlled with rudder pedals. If a series of circuit flights are performed, the touch-and-go technique shall be used. After several seconds of the touchdown the engine speed shall be set to maximum and takeoff shall be performed. When engine power is increased a nose-up pitching moment appears that shall be countered by pushing the yoke a bit forward. In case of a full-stop landing the main wheel brakes may be used when the nose wheel is on the ground.
13. Retract the flaps before vacating the runway.
Total time of the circuit flights
– 2 h. Number of flights – 4. Number of landings – 20.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
10.7.4 Balked landing
Balked landing (go around) situation occurs due to errors made during approach which can not be corrected or in case if an obstacle is suddenly detected on the runway. The balked landing procedure is described in the section 7.12.
Total time of balked landing training
– 20 minutes. Number of flights – 1. Number of landings
– 1.
10.7.5 Low speed flight, recognizing the starting and ongoing stall and stall recovery
The aircraft has no adverse handling features at low speeds and at stall with any of flaps settings. A light vibration of controls in roll may be noticed that warns about approaching to the stalling speed. The stall occurs in form of airplane pitch angle decrease without a noticeable change in bank angle. The airplane recovers from stall immediately if the flight controls are returned to their neutral position. During a low speed flight with wings level deflection of ailerons does not initiate stall. However during a turn at a low speed abrupt aileron deflection may cause stall with noticeable increase in bank angle.
Stall recovery procedure is described in the section 6.7.
Total time of balked landing training
– 20 minutes. Number of flights – 1. Number of landings
– 1.
10.7.6 High speed flight, recognizing and recovery from steep diving spiral
The aircraft has no peculiar handling features at high speeds. The control forces increase with airspeed growing and that impedes the abrupt control inputs and exceeding the limit loads due to that. During high speed flight the engine parameters must be monitored and exceeding its operational limits must be prevented.
To recover from a steep spiral the engine RPM must be reduced first and then the airplane must be brought to level flight by deflecting gently the ailerons and elevator.
Total time of balked landing training
– 20 minutes. Number of flights – 1. Number of landings
– 1.
10.7.7 Short field takeoff and landing with overflying obstacles
Short field takeoff and landing procedures are described in the sections 7.11 and 7.12. To fly over the obstacles (if any) during the climb and approach it is recommended to set the flaps to 2 nd
position and fly at the best climb angle speed V
X
= 90 km/h (49 kts).
Total time of balked landing training
– 20 minutes. Number of flights – 1. Number of landings
– 4.
10.7.8 Crosswind takeoff and landing
It is recommended to use 1 st
flap setting during crosswind takeoff or landing.
In case of crosswind takeoff it is necessary to rotate the yoke by 1/3 of its full travel against the wind direction and control the heading using the rudder pedals. Then the takeoff will occur with some bank angle. After the takeoff the wings shall be set level, the downwind drift shall be countered with an appropriate change of heading and climb shall be continued.
In case of crosswind landing it is recommended to keep the airplane aligned with the runway using rudder pedals while countering the downwind drift with a bank angle against the wind direction. The bank angle value shall be appropriate to the crosswind strength.
The bank shall be maintained until touchdown which will occur with one of the main wheels
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02 touching the ground before the other. During the landing roll the nose wheel shall be kept lifted as long as possible and the heading shall be maintained using the rudder pedals.
Immediately before the nose wheel is touching the ground the rudder pedals shall be set neutral in order to prevent the side load on the nose leg.
Total time of balked landing training
– 30 minutes. Number of flights – 1. Number of landings
– 6.
10.7.9 Flights with imitated engine failure
The emergency procedures in case of engine failure are described in the section 6.2.
When imitating the engine failure it is recommended to reduce the engine RPM to idle.
While doing that it should be kept in mind that sink rate with the engine stopped is by 0.5 m/s (100 fpm) higher than that with the engine at idle because of the remaining propeller thrust. Special attention shall be paid to maintaining the airspeed. The imitated engine failures shall be done at every leg of the airfield circuit.
Total time of balked landing training
– 30 minutes. Number of flights – 1. Number of landings
– 4.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
10.8 Glider and banner towing
10.8.1 General
A-22L2 airplane can be optionally equipped with E 85 tow release manufactured by Tost
Flugzeuggerätebau company ( http://www.tost.de
) for towing of gliders or banners.
The tow release is attached to the tail fuselage on a special fitting. The tow release can be acuated by pulling the tow release handle (located near the flap extension lever) connected to the tow release lever with a control cable.
10.8.2 Operating information and limitations
10.8.2.1 Maximum take-off mass of the airplane
The mass of the airplane used for towing may not exceed the value specified in the
Type Certificate Data Sheet.
Glider towing must be performed with only one pilot in the tow plane!
10.8.2.2 Maximum take-off mass of the towed glider
The maximum take-off mass of the towed glider is limited by 700 kg.
10.8.2.3 Towing rope and weak link
Only tow ropes certified according to airworthiness codes, industrial codes or manufacturing codes, if furnishing enough information, must be used if constant quality is guaranteed. The cable connections should be protected by appropriate covers. The ultimate cable load must not be more than the cable load declared by the aircraft manufacturer. For cable with higher ultimate loads a weak link corresponding to the limit load of the aircraft and the towed glider must be used. The strength of the weak link should not be less than 200 daN, and may not exceed 300 daN. Towing rope length should be from 40 to 60 m.
A clearly visible placard “Maximum weak link strength: 300daN” must be placed near the tow release.
10.8.2.4 Aero towing speeds
The minimum aero towing speed is equal to 95 km/h.
The best climb speed is equal to 105 km/h.
Aero towing speed may not be greater than the maximum permitted towing speed for the towed glider.
“Observe Tow Speed” placard must be placed next to the airspeed indicator.
10.8.2.5 Take-off distance and climb rate
The take-off distance to 15 m does not exceed 600 m in the following conditions:
- dry, even, short-cut grass strip;
- standard atmospheric conditions;
- flaps extended to 10°;
- glider with take-off mass not exceeding 700 kg.
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AEROPRAKT-22L2 Pilot Operating Handbook A22L2-POH-02
Glider type
PW-5
SZD-
51.1 „Junior“
SZD-48-
3 „Jantar Standard 3“
(no water ballast)
Glider TO mass, kg
TO distance to 15 m height
Best climb speed, km/h IAS
Climb rate, m/s
Time of climb to 360 m height
360
380
< 522 m
< 522 m
103…105
1,9
2,0
3 min 07 sec
2 min 50 sec
390 < 550 m 2,0 3 min 15 sec
NOTE
: High grass on the runway may increase the take-off distance by up to 25%, water drops and contamination on the wings (leading edge)
– by 10-15%, high air temperature
– by 5-10%.
10.8.3 Glider towing
- After glider is attached to the towing rope make sure that the tow release handle is in its foremost position, otherwise push it till stop;
- take-off with a glider attached shall be performed with the engine at take-off power
(5 minutes maximum) in a usual manner (like without a glider);
- the take-off distance requirements are specified in section 10.8.2.5;
- in the beginning of the take-off run the inertia of the aero train is very high, but with gaining speed the acceleration increases. After lift-off accelerate the airplane to
100 km/h and start to climb;
- it is recommended to maintain the best climb speed of 105 km/h IAS;
- observe limitations specified in the section 0.
WARNING
: While approaching the ground with the towing rope beware of the obstacles that may catch the rope. Release the rope over the landing strip threshold before landing.
10.8.4 Banner towing
Banner towing can be performed using the same tow release used for glider towing.
The attachment of the banner must ensure its safe release at any stage of flight.
- After banner is attached to the towing rope make sure that the tow release handle is in its foremost position, otherwise push it till stop;
- while taking-off with a banner take into consideration the length of the aero train
(airplane and banner). Take-off shall be performed in a usual manner;
- avoid making abrupt changes in direction or altitude of flight while towing;
- before landing release the banner by pulling the release handle;
- observe the banner operation instructions, provided by its manufacturer.
WARNING
: While approaching the ground with the banner beware of the obstacles that may catch the banner. Banner should be released at the height recommended by its manufacturer to avoid causing injuries to persons or damage to property by the free-falling banner.
10.8.5 Emergency situations
In emergency situation for immediate release of the towed glider or banner
– pull the tow release hadle located near the flap extension lever.
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Key Features
- Two-seat, high-wing monoplane
- VFR flight
- Ultralight category
- Rotax-912UL or Rotax-912ULS engine
- Tricycle landing gear
- Steerable nose wheel
- KievProp three-blade propeller
