On Sep 12, 11:45*am, "Morgans" wrote:
Clearly my understanding of this subject was inadequate. Thank you for
this link.

*Now, as I understand/see it, *with washout, the overall max lift in a
wing must be less than that given by just max Cl at stall and
planaform. This would not be the case with the 'flat plate lift'. for
a hershey bar wing with say 3 degrees washout, I'd say that flat plate
at 45 could generate at least as much lift as at the stalling point.
This may be a bit esoteric but I think it's interesting and might
indicate an even lower Va if vertical winds are anticipated.

One other point that may add to your understanding, on Hershey Bar wings.
It is my understanding that HB wings have little to no need for washout, as
their stall characteristics are very controllable with zero washout. *It has
been a while since I read on that subject, but I recall the distribution of
lift tends to make the stalls occur at the root and progress out to the tips
as the stall deepens, just like a "nice" wing should do.

But then, I could be wrong! g
--

Yes, quite right. I was using the term to imply constant chord which
makes it easier to think about Cl and lift variation along a wing with
washout. Some actual Hershey bar wings have very little washout
because they start their stall in the center and it may not rapidly
propagate, especially if fences or similar devices are added I
believe. That said, the constant chord wing with no washout introduces
other disadvantages...

Cheers