Al Gietzen wrote:

Following a thread here from a few days back, there is a very inexpensive
way to get the AOA info you need.  We don't really care what the AOA is;
what we want is knowing where the stall point is; and some margin above
stall that we like to maintain when taking off and landing.

A very simple way used by a friend of mine on his Lancair is to put a port
(like a static port) in the bottom of the wing at 12.5% of the chord from
the leading edge.  He has a pressure gauge in his panel that measures the
differential pressure between that port and the dynamic pressure of the
pitot tube.  He calibrated by making a series of flights to stall
conditions, noting the pressure reading at stall, and the pressure reading
at a margin above stall. These are marked on the guage.  He finds these
marks valid regardless of wing loading.

Al Gietzen

 
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