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Old January 18th 15, 07:13 PM posted to rec.aviation.soaring
Peter Purdie[_3_]
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Default Transponder Antenna Placement Fuselage Bottom - Minimize Damage? Exact Location

But most 'modern' composite gliders have carbon in the fuselage, so act
like metal for RF purposes.

As far as sailplane antennas go, the AV-22 'lollipop stick' is far too
fragile; blade antenna looks prettier but the flex is probably optimal; I
back up the conductive fuselage with a mesh screen inside the skin as 'belt
and braces'.

At 18:25 18 January 2015, Cookie wrote:
Well, yes on a METAL aircraft...and maybe carbon fiber...but
fiberglass...no...the L2 antenna usually goes on the inside wall of the
tail boom....radio waves go through fiberglass...


Cookie


On Sunday, January 18, 2015 at 9:40:48 AM UTC-5, Bob Pasker wrote:
I'm sure everyone knows this already, but its worthwhile saying again:

transponder antennas need to go on the bottom of the aircraft so they can
have line-of-sight to the radar facility, without being in the shadow of
the fuselage or the wings.