On Wednesday, January 23, 2019 at 8:50:29 AM UTC-8, wrote:
On Wednesday, January 2, 2019 at 6:26:42 PM UTC-7, Scott Williams wrote:
Has anyone actually installed a trig tt22, tn70, ta70 with a peregrine speed switch in a standard type certificated glider in the U.S.A and done the 337 and performance flight?

Don't ask me why, I'm a gadget enthusiast and have the above equipment, and don't fly anywhere near flarm equipped gliders.

Thanks, and Happy New Year!
Scott

Just some FYI. The installation diagram for the Peregrine airspeed switch depicts that it is in the 'low' or open condition when airborne (34 +/- 3 kts), and does not appear adjustable. The ASW-2 switch described from Aircraft Spruce ($47.50) is adjustable from 10-55kts; it is not intended for certified aircraft, which could be an issue for STC folks.

Charlie

I just bought and installed this ASW-2 switch. It is Normally open until triggered by the appropriate pressure differential. The TrigT22 can be configured for either a high or low input. The switch is preset for 40 knots, but my testing showed it to be closer to 80 knots. Adjusting is easy. Use a syringe to (carefully) pressurize the Pitot until your ASI reads 40 knots (or whatever you wish). Then adjust the switch with a small screwdriver until the ADS-B out switches from ground to air. Done! Check the transition point with the syringe to insure its right.

Matt