Locating Transponder Antenna on top of the fuselage instead of under it.

On Monday, December 30, 2019 at 10:34:25 AM UTC-5, wrote:
UH, as I said in my earlier post it was way easier to install on the turtle deck than down by the gear. In my 27, it took less than 4 hours from start to finish including the transponder and power routing. The longest portion was the routing of the antenna cable up through the tunnel to the panel, not alot of room in there I didnt crimp on the bnc to that end until after I fished it up to the panel. I mounted the blade as far back as I could possibly reach in the fuselage which is close to the junction of the flap and wing.

CH

I was thinking about the first message. Ventus CM would be an easy bottom install in the front of the engine bay.
Re '27. I did one behind the gear before the Schleicher tech note came out. Behind the gear was painful. The Schleicher TN installs through the oxygen cylinder area which is easy peasy.
I like to put ugly stuff where it shows less.
FWIW
UH

Thanks all for the great response and information !
I will contact Schenpp Hirth and get information/drawing about the fuselage top location option.
Don't want to drill holes in the fuselage before that....
Dan

Please let us know what you learn. I am thinking of an xponder install on my D2b.

On Monday, December 30, 2019 at 5:47:51 AM UTC-8, wrote:
On Friday, December 27, 2019 at 2:34:32 PM UTC-5, wrote:
Hi all,
Planning to install a Transponder Antenna on my Ventus CM.
Schempp Hirth indicates the possibilty of installing on top of the fuselage , behind the engine compartment doors.
Regarding being seen by ATC and Airlines, would that location perform better/worse/same as the standard location on side of fuselage - above gear doors ?
Dan

After reading lots of comments I am still wondering why not just mount on the bottom of the fuselage in the conventional manner?
UH

I was assuming with a CM there may be issues, never looked inside one but is there space given the engine bay and other junk?

Anyhow clearly the right thing to do is buy a new glider with transponder antenna in the tail. "It's for collision avoidance safety honey. You want me to be safe? Right?" :-)

I tried that argument earlier today Darryl.

Got shot down quickly

Lou