Snaps

[Jerry Budd]

>Isn't the definition of a stalled wing just that it doesn't have 
>laminar flow?  That is entirely possible in a downline with sharp 
>elevator input (think less extreme version of a TOC plane's 
>parachute or wall).

I think you mean separated flow (vs attached flow).  When the flow 
separates from the upper airfoil surface the pressure distribution 
over the top wing surface breaks down resulting in a loss of lift. 
If you then reduce the angle of attack the flow will (generally) 
reattach.  I say generally because at lower Reynolds Numbers the flow 
may not reattach right away.

Laminar (and turbulent) flow have to do with the boundary layer 
gradient on a surface exposed to a flow field.  It's almost 
impossible to have laminar flow on a model operating in the Reynold's 
Number ranges we do, the flow is pretty much always turbulent, all 
the time.

Jerry
-- 
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Jerry Budd
mailto:jbudd at qnet.com
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