Ameri-King AK-451-ELT - Manual (Page 35)

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2.2.2.2 ANTENNA INSTALLATION:
Please refer to FAA AC 43.13 for guideline.
After determining the Antenna mounting location per paragraph 2.2.2.1, install the
Antenna as shown in Figures 6, 7, 8 and 9.
1.
Drill a ½” diameter hole or pattern holes in the aircraft structure at the Antenna
mounting location.
2.
Install the Antenna and determine if the Antenna meets the static load
requirements. If not, a Double should be fabricated. A 100 time of antenna
weight force applied in the direction shown in Figure 3 should not cause an
appreciable distortion in the aircraft skin.
3.
If the Antenna is being mounted on a non-conductive portion of the airframe, a
supplementary ground plane must be installed. The supplemental ground plane
must have a minimum diameter of 36” and be centered about the base of the
Antenna. This maybe provided
using a conductive metallic coating
painted on the inside of the aircraft structure (SPRAYLAT Series 559 or
equivalent) or may be fabricated out of aluminum foil and attached to the inside
of the aircraft structure. A Doubler Plate should be used to provide increased
surface contact area between the ground plane and the Antenna.
4.
Assemble of the Antenna as shown in Figure 3. Make sure the rubber washer,
which forms a moisture seal between the Antenna base and the aircraft structure
is in place before installing the Antenna. Also make sure the serrated locking
washing is in place.
2.2.2.2.1 Whip Antenna Installation: (AK 451.017-1B)
The AK 451.017-1B Whip Antenna delivers optimum performance only when
installed correctly. To ensure adequate structural strength of the aircraft for
associated air loading during flight, use of a backing plate or doublers (not supplied)
may be required. Refer to FAA Advisory Circular 43.13-2B for guidance. It is the
responsibility of the installation agency to determine the appropriate and adequate
antenna installation. The AK 451.017-1B Whip Antenna is designed to provide ELT
transmissions from a single BNC Female Coaxial connector.
Location:
The AK 451.017-1B must be mounted on the top of the aircraft to assure maximum
visibility of satellites (406 MHz). The best location is the upper aft portion of the
fuselage. It should be mounted vertically and away from projections such as a
propeller, tail surfaces, or the shadow of larger antennas. Refer to Fig. 6 for a drawing
of the antenna.