D-0006 BOM (Broadcasting Outer Module

2017
D-0006
BOM (Broadcasting
Outer Module)
Installation Instructions
LEVIL AVIATION
1704 KENNEDY POINT, SUITE 1124
OVIEDO, FL 32765
BOM (Broadcasting Outer Module) Installation Instructions
Effective Date
Document No.
12/6/17
41
Page 1 of 12
Revision
1
Code Number
D-0006
This manual is the property of Levil Aviation. It may not be replicated in whole or in part or
otherwise divulged without prior written consent from Levil Aviation. All printed and electronic
copies and versions except the one electronically signed inside the Levil Aviation database, are
considered unofficial copies and may be used for reference only.
This is a controlled document, if any changes are made (even a single character) to any part of the
document it is considered an entirely different document. For this reason, a Revision Record page
is provided, documenting every single change done to the document.
Address:
1704 Kennedy Point, Suite 1124
Oviedo, FL 32765
Telephone:
(407) 542-3971
Revision Date:
Approved by:
General Manager
______________________________ (Name)
_________________________ (Signature)
_______________ (Initials) _________________ (Date)
Quality Assurance Department Manager
______________________________ (Name)
__________________________ (Signature)
_______________ (Initials) _________________ (Date)
BOM (Broadcasting Outer Module) Installation Instructions
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Revision
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AMENDMENT RECORD
This procedure is reviewed to ensure its continuing relevance to the systems and process that it
describes. A record of contextual additions or mission is given below:
Revision No.
1
Date
12/6/2017
Responsable Person
Description of Change
Initial release
Warranty
Levil Aviation warrants this product to the original purchaser to be free from defects in material
and workmanship for a period of one year from the date of the original purchase. The following
are not covered: software, damage resulting from accident, neglect, misuse, fire, or flood, improper
voltage supply or failure to follow operational guidelines supplied with this product. Extended
warranty is available for purchase on our website.
Please register your product online at: http://aviation.levil.com
IN NO EVENT, SHALL LEVIL AVIATION BE LIABLE FOR ANY INCIDENTAL, SPECIAL,
INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE,
MIUSE OR INABILITY TO USE THE PRODUCT OR FROM DEFECTS IN THE PRODUCT.
SOME STATES DO NOT ALLOW THE EXCLUSION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO
YOU.
BOM (Broadcasting Outer Module) Installation Instructions
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Table of Contents
1.
Introduction ........................................................................................................................................... 4
2.
Installation............................................................................................................................................. 5
2.1
3.
4.
Choosing the place of installation: ................................................................................................ 5
Structural Strength Requirement ........................................................................................................... 7
3.1
Pull Test ........................................................................................................................................ 7
3.2
Torsional Test ............................................................................................................................... 7
Attaching the BOM to the wing or airframe ......................................................................................... 7
Option 1: ............................................................................................................................................... 8
Option 2: ............................................................................................................................................... 9
4.1
5.
After Installation ......................................................................................................................... 10
Operating Limitations ......................................................................................................................... 11
BOM (Broadcasting Outer Module) Installation Instructions
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1. Introduction
Every pilot should have a safety net when they go flying because no matter how much we hope
for the best, it is always good to be prepared for the worst. The BOM provides an affordable
solution that gives pilots the peace of mind they need to be able to safely overcome any instrument
malfunction or related emergency.
The BOM (Broadcasting Outer Module) is the first and only aerodynamic pod that mounts under
the wing of the aircraft. All components are incorporated into the BOM, making it a fully
independent, completely wireless, all in one avionics device. The BOM is a platform for
innovation, setting the stage for the future of aviation.
The BOM is a fully independent, completely wireless, self-powered, all in one avionics device.
Avionics include WAAS GPS, ADSB-in, AOA, Air Data (Altitude, Airspeed), AHRS (Attitude,
Directional Gyro, Turn Coordination, rate of turn, VSI) and outside air temperature. Once it is
installed, the BOM connect via Wi-Fi to a tablet inside the cockpit and data can be displayed on
multiple Apps thanks to its open protocol.
Figure 1. BOM features
BOM (Broadcasting Outer Module) Installation Instructions
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What makes the BOM special?
•
•
•
Automatically Powered on/off with the vibration of the engine
Self-powered and self-charging
Fully independent inertial measurement system & source of altitude, position, and
flight telemetry
Wireless platform offering iOS/Android compatibility
Multiple App compatibility. For a full list of compatible apps visit our website
http://aviation.levil.com/compatible-apps.html
•
•
2. Installation
Installation of the BOM was made easy by eliminating wires all together, and making the BOM a
completely wireless interface system. Installation requires:
•
•
•
•
Remote location: Under the wing or any place away from propeller backwash
Positioned close to the leading edge of the wing (for GPS reception)
Attitude adjustments for level flight
Angle of Attack calibration
The following are some considerations before installing the BOM:
The BOM is an instrument package and should be treated as such. Do not drop it, bang it, use as
lever to bend the installation bracket, immerse in liquid, etc.
2.1 Choosing the place of installation:
• To avoid erroneous air speed and angle of attack readings, the BOM should be installed
outside the propeller wash and some distance away from the boundary layer (Boundary
layer is the pressure change as the air moves around a surface)
• For optimal GPS reception, the front of the BOM should be facing the sky
• For optimal Wi-Fi signal, the tablet should have a direct view of the BOM, however, it will
still work if there is partial blockage
• For optimal ADS-b reception, the BOM should have a direct view to the ground towers
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After all these considerations, a recommended location to mount the BOM is slightly forward of
the wing leading edge on the lower part of the wing. Some high wing aircraft have wing struts that
could be used to attach the BOM and will give good clearance for GPS reception.
Fig 2. Ideal position for the BOM where the nose has a clear view to the sky
Because the BOM requires to be installed some distance from the wing or other installation
surfaces, a 100-mm long installation bracket is supplied. This bracket has an adjustable channel to
set the tilt angle as necessary.
Fig 3. Bracket to support the BOM from the installation fixture
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3. Structural Strength Requirement
3.1 Pull Test
The structure must be able to sustain 6G pull test in the vertical axis when installed in test
fixture representative of an aircraft panel. The BOM weight is 0.8 lb. therefore the installation
must support more than 4.8 lb. (0.8 lb. x 6Gs = 4.8 lb.).
Before installation, perform the following pull test to make sure that the base is strong enough
to sustain the BOM:
•
•
•
Cut a piece of a rigid material (i.e. wood) slightly bigger than the inspection plate
whole.
Clamp the piece of material to the inspection plate; use two clamps, one in the front
and one in the back of the inspection plate.
Perform a pull test with a force of more than 4.8 lbs.
The inspection plate base must sustain this applied force without deformation.
This test must be repeated once installed on the aircraft.
3.2 Torsional Test
The BOM requires a minimum of 1.5 lbs. of force in the longitudinal direction at maximum
speed (210 kt.) and at least 10 lbs. of force in longitudinal and lateral direction for accidental
collisions. Since accidental collision forces are greater than the flying forces, the torsional test
will be performed using the 10-lb. force.
Using the same set up as mentioned in 3.1:
•
•
Attach a 3rd clamp to the center of the rigid material already attached.
Push the clamp in the longitudinal and lateral direction, at a distance of 4” from the
base, with a force of 10 lbs.
The inspection plate base must sustain this applied force without deformation.
This test must be repeated once installed on the aircraft.
4. Attaching the BOM to the wing or airframe
Because of the versatility of the BOM there are many ways to attach it to the wing or airframe.
The following options have been tested up to 210 kt. As more options are tested, installation
procedures may be updated.
BOM (Broadcasting Outer Module) Installation Instructions
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Option 1:
The first method is using an inspection plate near the leading edge. Not all inspection plates
can be used, there are some things to take into consideration.
The BOM has been calculated to have about 0.7 lb. of drag at 210 kt. Therefore, the inspection
plate should be able to sustain a moment of 0.7 lb. with a 4” arm if you fly at 210 kt.
Fig 4. Testing for inspection plate rigidity
The inspection plates are usually made of a thin aluminum sheet. A 1/16” thick plate is
recommended, and may be purchased separately, to make the installation stronger. Use the
airplane’s inspection plate as a template to cut the 1/16” aluminum plate.
Fig 5. Mounting plate with brackets to replace inspection plate
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Make sure the screws that hold the inspection plate are at least 8-32 or 10-32 (4mm – 5mm).
Do not use self-tapping screws as they tend to loosen with vibration.
Once the BOM is installed, the tilt angle can be adjusted to 0 tilt using the AHRS Utility App.
For tail draggers, the tail must be lifted into a position simulating flying conditions; at that
position the tilt angle is set.
Option 2:
A second method to install the BOM is by using an external bracket to hold it to the wing using
the screws that hold the fuel tank, or the tip fairing. NOTE: Piper’s fuel tanks tend to leak and
placing a device here may increase the risk of fuel leaking.
RV’s may benefit from this method since inspection plates are too far back in the wing.
Fig 6. BOM installation on an RV9 using an external bracket. Notice the pitot on the right is at the same distance
from the wing
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The bracket installation is more rigid than the inspection plate installation. Brackets for
different airplanes can be purchased separately from Levil Aviation or you can make your own
using a 1” x 1” x 1/8” 6061 aluminum extrusion. While the extrusion is still long, use a vise to
give the shape of the wing, then cut it to length and remove the excess material.
Fig 7. Bracket to install the BOM using screws already on the wing
NOTE: If you are not using an existing installation location, additional FAA approval may be
required. Please contact your local flight standard district office to discuss required
documentation.
4.1 After Installation
Once the BOM is installed and the tilt angle is set, there may be roll errors. To correct the roll
error, the bracket extending from the wing to the BOM must be bent. Small pitch and roll errors
(<5 degrees) can be “artificially” fixed by software using your navigation App’s calibration
tools. The App can offset small installation errors to reduce the need for bending the bracket.
NOTE: DO NOT BEND THE BRACKET WHILE INSTALLED ON THE WING OR
ATTACHED TO THE BOM.
Dismount the BOM and remove the bracket from the wing. Use a vise with two pieces of wood
holding it. Bend it slowly using a rubber mallet or a piece of wood. Avoid denting or overbending since it will weaken the bracket.
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Fig 8. BOM installation using an external bracket
5. Operating Limitations
a) The BOM system is not a required system and may not be used as a substitution for the
certificated aircraft system.
b) No operational credit may be taken for installation of the BOM system.
c) The AoA included within the BOM is non-required and is to be used only as supplemental
information to the pilot. The AoA system may not be used as a substitution for the certified
aircraft stall warning system.
d) No operational credit may be taken for such items as reduced approach speed and shorter
landing distances.
e) The BOM may be flown at a Maximum speed of 210 kt.
f) Although the BOM transmits AHRS Data is not to be used as a substitution for the certified
AHRS instrumentation of the airplane. The AHRS supplied by the BOM is to be used only
as supplemental information to the pilot.
g) Levil Aviation does not provide or endorse any carry-on device that displays the
information sent by the BOM.
h) Ferrous Materials near the BOM may affect the compass reading.
i) When transporting or temporarily storing in an airplane or vehicle, temperature range
should be no less than 20 ° F (-12 ° C) and not more than 150 ° F (65 ° C)
j) Storing our device at temperatures higher than 170 ° F for extended periods of time (more
than 2 hrs.) may cause damage to battery and possible fire.
k) DO NOT disassemble, remodel, drop or modify the BOM as this will invalidate the
warranty of the unit as well as the FAA NORSEE certification.
BOM (Broadcasting Outer Module) Installation Instructions
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l) Do not use the BOM as an anti-collision system. Not all traffic is displayed using ADS-B
in. Most aircraft are not currently ADS-B Out equipped and therefore not detectable by the
BOM.
m) Levil Aviation does not provide a display for this unit. Any display the pilot chooses to
integrate Should comply with FAA certification requirements or qualify as a carry-on
device. Under no circumstances should any display be placed in any way that it will
obstruct the pilot’s views of the aircraft flight instruments or the external view, which may
be detrimental to the ability of the pilot to fight the aircraft.