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From: mmallory@netcom.com (Mark Mallory)
Subject: Re: What makes an airlplane turn?
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Date: Wed, 17 Mar 1999 18:35:06 GMT
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Todd Pattist (pattist@DONTSPAMME.worldnet.att.net) wrote:
: It could still turn without the weather vaning ability, but
: it would need some active control of the yaw to aim the lift
: vector.

No, yaw does NOT "aim" the lift vector, as the previous example of the 
Flying Wing shows: again, as long as the Wing is not banked, it's lift 
vector will remain *vertical*, whether the wing is yawed or not.

And again, the lift vector MUST be at right angles to the Relative Wind.  It 
is impossible to "aim" the vector such that it has a component pointing 
*towards* the relative wind.

Banking the wing DOES aim the lift vector though; the *horizontal* 
component of lift produced when the wing is banked is what causes an 
airplane to turn.  But again, both components of the lift vector *must* 
be at right angles to the relative wind, NOT necessarily the heading of 
the airplane.
