Posted for Jeff Peterson <jeffreyb.peterson@gmail.com>:

 LML:
 
 Would it be possible for some one (or several pilots) with a flying 360 to
 measure the actual stall angle of attack for a few flap settings?
 
 I am tinkering on the bench with AOA circuits and considering adding an
 offset for as a function of flaps up versus down.  But, I would like
 to know if this really is needed.  After all, many thousands of airplanes do
 have stall
 warnings that do not include flap input.
 
 If my 360 was flying here is how I would make the measurement.
 attach an "angle locator" to the arcraft, aligned with a longeron.
 rig a video camera to record the locator.
 
Fly a few stalls, but be sure to hold altitude in the lead up to the stall.
 
 Then review the tape on the ground.
 
 Perhaps someone out there already knows the answer to my
 question: by how many degrees does stall angle of attack shift?

 --
 Jeff Peterson
 L 360,  buiding the panel

[This has all been done, it's already on the market in the form of the Advanced Flight Systems (used to be Proprietary Software) AOA instruments.  Those instruments assume that you have a new airfoil the instant you add flaps.  That's why there are two databases, one for flaps up, one for flaps down.  Different folks trigger the flaps down at different amounts of flap deployment, although  "any" flaps is sufficiently different from "no" flaps to trigger the change in database.  As there are an infinite number of flap settings, the decision to handle this info in this manner was taken to avoid information overload and unnecessary complexity.  <Marv>   ]