"Greg Esres" wrote in message
...

Vo does differs a little from pt 23 certification requirements, in
that Va isn't exactly Vo, because Va calculations assume that airfoil
lift does scale linearly with AOA and as the square of airspeed
when in fact these are only approximately true.

The only distinction I see between Va and Vo is that Va says "not less
than" and Vo is "not greater than". Where do you see the distinction
you are drawing?



I assumed that Vo was an actual speed determined by calculation or
flight test.

Va = Vs.sqrt(n) assumes (in the equality) lift linearity vs. AOA (which
we know drops off near the stall) and a quadratic relationship between
lift and AOA (which is only true for small AOA & probably off by
10% or more close to the stall).

That's why I called the distinction. Nothing profound.

--
Dr. Tony Cox
Citrus Controls Inc.
e-mail:
http://CitrusControls.com/