An interesting question, but I seldom look at the transponder control
head (TT22) to tell.Â* I do know that, when I turn the transponder on, it
reports GND on the screen and every time I've looked in flight (not that
often) it has always said, ALT.Â* I have noticed on my ClearNav II that
the ground speed has never shown less than 40-something knots except
while flying in wave but, again, I don't look at the ground speed that
often.

On 11/22/2019 4:23 PM, JS wrote:
On Friday, November 22, 2019 at 2:33:56 PM UTC-8, Scott Williams wrote:
On Friday, November 22, 2019 at 2:01:42 PM UTC-6, wrote:
Darryl, Ramy, Williams, et al

After installing a squat switch (such as the Peregrine brand), did your plumbing pass a pitot/static leak test?

I have heard gossip of the Peregrine switch having pitot/static leak issues. Is there another approved squat switch known not to leak?
This last summer I installed the Perigrine ground/air speed switch, with a small syringe applying just enough pressure to read 50 knots airspeed, reading is steady as a rock for over 20 minutes during a transponder-Ads_b check.
Good Luck,
Scott
Anyone had problems with these switches detecting an airspeed low enough in thermals to switch it to "on the ground" mode?
Jim

--
Dan, 5J