Stall and airspeed parameter

@SlickShot wrote:

hey guys,
I have recently played with airspeed for my arduplane. I noticed my plane behave differently when I set (previous setup was on default value) :

first try :
FBW_ARSPD_MIN = 50
FBW_ARSPD_MAX = 100
TRIM_ARSPD_CM = 60
TRIM_THROTTLE = 50 (usually result 84kph true airspeed and 95 ardupilot airspeed)
USE_ARSPD = 0 (I didnt activate this yet so ardupilot will still uses my TRIM_THROTTLE instead of TRIM_ARSPD)

second try :
FBW_ARSPD_MIN = 50
FBW_ARSPD_MAX = 100
TRIM_ARSPD_CM = 60
TRIM_THROTTLE = 50 (usually result 84kph true airspeed and 95 ardupilot airspeed)
USE_ARSPD = 1

I noticed that my FBWA is affected, I have much more limited roll and also limited pitch on landing approach(low throttle, about 30%), which didnt happen (or maybe it does happened but not as limited as now) when parameter above was still default. I assume this is due to the STAB_PITCH_DOWN parameter which takes control of my roll and pitch limit?

this brings me to a 2nd question, the ardupilot document stated that STAB_PITCH_DOWN is active when THROTTLE is below TRIM_THROTTLE, but does it also active when ardupilot calculated airspeed (not sensor speed) is below TRIM_AIRSPEED_CM?

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