AOA Calibration

[bob888]

When calibrating the AOA (G3X), does flap position matter?

 

[BobTurner]

I hope not. Otherwise, the AOA devices, including conventional stall warning vanes (which are a single angle yes-no AOA measurement), would be pretty useless.

 

[uk_figs]

The "on speed" team will probably jump with a definitive answer but I do know that on my Dynon AoA the calibration exercise includes stalls in multiple configuration both flaps up and flaps down. This is the older system on the D-100 so maybe things are different with the modern avionics.
Figs

 

[M McGraw]

Yes

When calibrating the AOA (G3X), does flap position matter?

You can calibrate the G3X AOA for both flaps up and flaps down.

 

[vinzer]

While doing a custom AOA system using Dynon's heated Pitot/AOA probe I found that the difference in numbers (pressure values from AOA and Pitot probes) with and without flaps in stall is very little between 0 and 15 deg. Number between 0 and full flaps is relatively bigger. If you calibrate AOA with no flaps only stall it will incorrect while full flaps by some amount.

 

[bob888]

Thanks Vlad