Flarm and transponder recs and questions.

278 views
Skip to first unread message

Victor S

unread,
Mar 1, 2026, 10:38:33 PM (2 days ago) Mar 1
to RAS_Prime
Hello.

I was wondering if you guys can recommend a good good flarm and transponder. I am leaning towards fusion for the flarm but the transponder got me all sorts of confused. They are going into a non experimental glider. I was advised to get the the trig, but which one? Do I need a gps antenna? is it this one : https://wingsandwheels.com/avionics-instruments/transponders/trig-transponders/trig-tt23-transponder-02627-00-01.html or this one: https://wingsandwheels.com/avionics-instruments/transponders/trig-transponders/trig-tt21-transponder-00710-00.html.

Thank you.

George Haeh

unread,
Mar 2, 2026, 2:12:14 PM (2 days ago) Mar 2
to rasp...@googlegroups.com
Air Avionics offers a really neat electronic altimeter that can also control various transponders (except TT-23 at present time) and radios. 

The altimeter is accurate within 3-4' when I had it calibrated with my TT-22. The baro altimeters on many gliders are way off. 

My PAPRs are good with a TN72 and small gps antenna as long as I'm not thermaling, but regulations say no. 

--
  George Haeh

--
Thanks for using RAS_Prime!
---
You received this message because you are subscribed to the Google Groups "RAS_Prime" group.
To unsubscribe from this group and stop receiving emails from it, send an email to rasprime+u...@googlegroups.com.

Ian Molesworth

unread,
Mar 2, 2026, 2:37:00 PM (2 days ago) Mar 2
to rasp...@googlegroups.com
ACD 57 with radio and transponder. Gamechanger.

George Underhill

unread,
Mar 2, 2026, 3:16:13 PM (2 days ago) Mar 2
to rasp...@googlegroups.com
The Trig transponders are popular units.  As George and Ian mentioned, if you want to save space and have a compatible radio you could use the Air Avionics ACD-57 to control the transponder and radio with one head unit.  You can also incorporate an altimeter into the display.  They do require additional licenses (ie fees) to enable control of the radio, transponder, and altimeter options.  If you lack a compatible radio, and have a sufficient budget, you could install the Air Avionics radio, Trig transponder and GPS antenna, FLARM fusion, and control the radio and transponder from the ACD-57.  You could also add the altimeter function.  If the ACD-57 currently lacks the ability to control the latest Trig transponder (TT-23), contact Air Avionics to see if they plan on supporting it.  It works with the TT-22, the previous model.


George

--

George Haeh

unread,
Mar 2, 2026, 9:19:15 PM (2 days ago) Mar 2
to rasp...@googlegroups.com
Let's not forget that you want a flight computer that displays Flarm, xpdrs and ADS-B traffic. 

Check out www.fly-air3.com. They're targeted to hang and para glider pilots, but work fine in gliders and have a bigger display than the Oudie N. I put mine on a NavPad. 

They also have optional Flarm functionality, but just one internal antenna. 

--
  George Haeh


Richard Pfiffner

unread,
Mar 3, 2026, 10:53:17 AM (14 hours ago) Mar 3
to RAS_Prime
ACD and Trig TT23
Or give me a call
Richard

Erik Mann

unread,
Mar 3, 2026, 2:00:55 PM (11 hours ago) Mar 3
to RAS_Prime
I find the ACD -57 very un-intuitive to use and also a real beast to set up.  I even RTFM :-)   
Is it just me?

P3

Jeffrey N Banks

unread,
Mar 3, 2026, 2:25:10 PM (10 hours ago) Mar 3
to rasp...@googlegroups.com
Eric,

I found the same in the beginning. 
After pushing twisting and pushing a bunch of times,
my fingers seem to get it right.

My tech savvy son says I tend to be afraid to make changes because bad things happen.
Alternatively he loves to make changes because there is so much new to discover.

Anyway.  It gets better after getting time on the knobs.

I love it now!!

The Say Again function is fun.  I want to experiment with  the headset to the mic,  press the SAGN button and read back clearances in the voice of the sender.

Sincerely
N9





Reply all
Reply to author
Forward
Message has been deleted
0 new messages