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Old 1st Jun 2011, 14:30
  #1248 (permalink)  
Graybeard
 
Join Date: Nov 2006
Location: SoCalif
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Barnyard Logic

Go outside, farmer, and look at the weather vane on your barn. Note, it aligns into the wind because its tail has more area than its point, which is only needed for static nose/tail balance. Note that it also has a lightning rod above it.

Angle of Attack is vertical measure of relative wind. The AOA sensor is just a high priced vertical weathervane, as seen previously on this thread. It's high priced because it has to be reliable in all imaginable weather and flight conditions, including direct lightning strikes or sweeps. It has some inertia and frictional damping to prevent flutter in all possible conditions.

Therefore, just as your barn's weathervane can be erroneious below about 10 knots wind, the AOA sensor cannot be trusted below about 60 knots.

You got a better AOA sensor? If not, why are you criticizing lack of Stall Warning below 60 knots?

If you don't understand this, maybe your time would be better spent shoveling out the barn.
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