Many thanks to everyone who has (will?) responded!!!! The technical info
is great. I now have a copy of Xfoil and am trying to figure out how to
use it. The "realistic" advice is also well taken.


Steve wrote:

Since the good Doctors are done explaining how it should be done in
the electronic world, here is a bit of advice for you to ponder,
Larry.

It was good enough for NACA to have the leading edge be above and
ahead of the origin of the coordinates system (Remember, Aero
specialists. Leading edge radius and slope on the old sections, hmm?)


Steve, et. al., did NACA _actually_ intend that the leading edge be above
and ahead of coordinate origin?? Or is that simply how we choose to
conveniently spline it currently? Seems like that messes up the whole
"chord" reference mechanism...

Thanks again to all... this is really interesting!

Larry Goddard
"01" USA