I mounted the xponder antenna in your (approximate) location 2 on my
LAK-17a.

There are 3 reasons that I can think of to mount it the

1. Being on the bottom, you'll be more visible to ATC radar and they will
point you out to any other aircraft under their control or monitoring.
2. Being offset from the center will eliminate the risk of catching the
antenna while loading the glider into the trailer.
3. (At least in the case of the LAK) the fuselage mold join line is on the
center line and the material was too thick to mount the antenna on center.

The ground plane of your antenna, as well as the carbon fuselage, should
shield your good looking cranium (or nuts) from radiation.


wrote in message
...
Glider is a Discus 2cT (carbon fuse). Antenna is an external aerodynamic
blade style.

Although at some point SH mentioned mounting an antenna on top of the fuse
BEHIND the engine bay I have been unable to obtain any drawings or
specifications on how to reach this location and it looks like a major PIA
to do so.

Assuming there are no details on the rear location mount, my preferred
choices would be:

Location 1): On top of the fuse approximately 12" behind the canopy mounted
directly in the center. This would be a simple and aesthetically pleasing
install but I have not been able to find any data to prove or disprove any
health risks by mounting the antenna this close to my (IMO) good looking
cranium.

Given the requirement to mount the antenna externally due to the carbon fuse
blocking an interior signal from getting OUT, I'm left wondering if the same
carbon fuse should then protect me from an external antenna signal coming
back IN? (I also heard a rumor that Knoff mounted an antenna in this
location on a Duo Discus?)

Location 2: Next to the gear pointing out (down) at roughly 45 degrees. This
is again an easy install, astheticaly a little less pleasing being offset at
an angle, and once again brings up the question of proximity to my brain.

Thanks so much for any input.

Scott