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A Level 1 AOA clarification



 
 
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Old December 28th 04, 09:42 PM
David CL Francis
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On Tue, 28 Dec 2004 at 03:56:41 in message
, G.R. Patterson III
wrote:

If I leave the flaps at 0 degrees, slow down to 60 mph indicated and raise the
nose enough to stall, the aircraft will be climbing just prior to the stall. The
relative wind will be "coming from above", since that is the direction in which
the aircraft is traveling.


I think the question here is "Above What?" If the aircraft is flying
then the relative wind will be coming from a direction in which the
velocity vector of the aircraft is pointing (assuming we are talking
still air).

But it will not be coming from "above the aircraft". A normal angle of
attack sufficient to satisfy the required lift vector must still exist.
The lift required when climbing is normally somewhat less than that
required in steady horizontal flight.
--
David CL Francis
 




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