Hi @WickedShell and @Graham_Dyer, thanks for your help at the time in Why does airspeed not reset to 0 before takeoff and why did autocal make it worse?
I was initializing a bixler with a 3rd party I2C airspeed sensor, probably not the best one ever made. The speed was 20kph on the ground with no wind.
I’m assuming it drifts quite a bit due to temperature or whatever, fine, that’s what preflight airspeed calibration is for.
Except, that’s in apmplanner2, but not in tower.
I only had a phone, and it was not easy to reset the speed to 0.
So I came to wonder, why go through this entire dance every time?
Why not have an option that resets airspeed to 0 when the aircraft is armed? (pilot would have to block the pitot tube to make sure it’s not into the wind)
My understanding of ARSPD_AUTOCALis that it only works in the air, and it’s not recommended to leave it on, correct?
Besides, it’s ARSPD_OFFSET I need to adjust, not ARSPD_RATIO anyway.
I already have ARSPD_SKIP_CAL set to 0.
Does this mean it should recalibrate to 0 at startup like I’m wanting for it to?
But if so, why is not quite working and why does apmplanner2 have an option to do this manually?