msaltzman14
Active Member
Hi All!
I recently got my panel upgraded to a full G3x kit. WOW is it great.
However, my True Airpseed is indicating 150 knots when my actual TAS (as calibrated using the three-leg GPS method) is 157.
I called Garmin and they said most likely culprit is the temperature probe reading inaccurately, but I just essentially debunked that possibility with the following logic:
Temp indicated was 0 degrees Celsius @ 8000 today. That temperature output a TAS indication of 150. For the actual TAS to be 157, the actual Temperature would have to be 23 degrees C (given 30.14 inches and 8000 indicated). It certainly wasn't anything close to that.
My avionics guys did a check and found no leaks in the pitot system.
Anyone else have this issue? Anyone resolve it?
Thanks!
I recently got my panel upgraded to a full G3x kit. WOW is it great.
However, my True Airpseed is indicating 150 knots when my actual TAS (as calibrated using the three-leg GPS method) is 157.
I called Garmin and they said most likely culprit is the temperature probe reading inaccurately, but I just essentially debunked that possibility with the following logic:
Temp indicated was 0 degrees Celsius @ 8000 today. That temperature output a TAS indication of 150. For the actual TAS to be 157, the actual Temperature would have to be 23 degrees C (given 30.14 inches and 8000 indicated). It certainly wasn't anything close to that.
My avionics guys did a check and found no leaks in the pitot system.
Anyone else have this issue? Anyone resolve it?
Thanks!