Appendix R: Orbcomm Datalink Antenna Mounting - Avidyne Entegra EX5000 MFD Series Installation Manual

Appendix R: ORBCOMM Datalink Antenna Mounting

OVAL HEAD SCREW
NAS387-388
OR FLAT HEAD
COUNTERSUNK
LOCK WASHER MS35790
(FOR AV14)
GASKET (AV14)
RIVET NAS1097AD3-5
FOR NUTPLATE
FUSELAGE SKIN
EXISTING STRUCTURE
NUTPLATE MS21059-L08
OR
SELF LOCKING NUT MS21044-N3
ANTENNA INSTALLATION
NOTES:
1. ANTENNA: COMANT 177-4 (250 KNOTS).
2. INSTALL IN ACCORDANCE WITH AC 43.13, ANTENNA MFG GUIDANCE, AND TSO STANDARDS.
3. ANTENNA LOCATION: TOP OF AIRCRAFT. DISTANCE FROM TRANSMITTING ANTENNA: 36 IN. MIN. DISTANCE FROM VERTICAL
STABILIZER: 36 IN. MIN. ALLOWABLE HEIGHT OF VERTICAL STRAKE NEXT TO ANTENNA BASE: 2 IN MAX.
4. GROUND PLANE REQUIRED, 12 IN RADIUS MIN FOR NON METALLIC FUSELAGE.
5. ANTENNA DOUBLER PLATE FOR ALUMINUM FUSELAGE TYPICAL. DOUBLER SPANNING 2 STRINGERS, 0.125 MIN. DIA. RIVET SPACED 1.5
ON ALL EDGES OF DOUBLER. PREP AND COAT WITH CONDUCTIVE CHROMATE OR ALIDYNE.
6. ANTENNA GROUND CONNECTION MADE VIA INSIDE SURFACE OF FASTENER COUNTERSINK. REMOVE PAINT FROM COUNTERSINK
SURFACES AND COAT WITH CONDUCTIVE SEALANT OR INSTALL COUNTERSUNK LOCK WASHERS PER MFG GUIDANCE.
7. MOUNTING HARDWARE: TORQUE EVENLY. SEAL EXPOSED SURFACE AND COUNTERSINK SURFACE.
8. RESISTANCE: ANTENNA GROUND TO MOUNTING HARDWARE TO DOUBLER TO AIRFRAME/GROUND PLANE MAX < 0.5 OHM
9. ANTENNA CABLE: RG-400/U COAX, STRANDED CORE. ROUTE COAX ANTENNA CABLE TO MFD WITH NO KINKS OR BENDS GREATER THAN
2 IN. RADIUS. SECURE ALONG LENGTH, AVOID CHAFING.
10. FIBER REINFORCED PLASTIC (COMPOSITE) FUSELAGE INSTALLATION ONLY IN ACCORDANCE WITH AIRFRAME MFG GUIDANCE,
APPROPRIATE SIMILAR STC BASIS, OR DER APPROVAL.
11. AIRCRAFT PRESSURE VESSEL INSTALLATION ONLY IN ACCORDANCE WITH AIRFRAME MFG GUIDANCE, APPROPRIATE SIMILAR STC
BASIS, OR DER APPROVAL.
12. ANTENNA SPECIFICATIONS: FREQUENCY:138-151 MHz,
VSWR: 2.0 to 1 MAX, IMPEDANCE: 50 OHM,
POLARIZATION PATTERN: VERTICAL OMNI-DIRECTIONAL,
RF POWER: 5 W, HEIGHT:18 IN MAX,
TSO C37d, C38d,
RTCA/DO-160c, ENV.CAT. D2-AC SXSXDFSXXXXXXXXXX
13. ALTERNATE ANTENNA FOR COMPOSITE AIRCRAFT INTERNAL MOUNTING
IS ADVANCED AIRCRAFT ELECTRONICS VHF-6T FLEXIBLE DIPOLE.
ACCEPTABLE
UNACCEPTABLE
ANTENNA MOUNTING
LOCATION
23
RIVET NAS1097AD4-3
FOR DOUBLER 20 PLACES
CROSS SECTION
- 114 -
UNACCEPTABLE
Ø 0.75
0.812
18
0.812
1.00
NOT TO SCALE
ANTENNA DOUBLER PLATE
RIVET MS20470AD4-6
DOUBLER PLATE WITH FLANGES OR JOGGLE
FASTENED TO EXITING STRUCTURE (TYPICAL)
AVIDYNE CORPORATION
INSTALLATION MECHANICAL
DATA LINK ANTENNA
EX5000 Installation Manual
P/N 600-00073 Rev 24
Ø 0.1285
20 PLACES
SPACED 1.5 NOMINAL
Ø 0.177
4 PLACES
1.00