Thanx for the links, Bob K.! I'll check them out. Paul
Bob K. wrote:
Earlier, ELIPPSE wrote:

Can anyone supply me with the type of
airfoil used on the Glasair 1 TD
and its zero-lift alpha. 'Preciate it!

According to this, it's probably the NASA GA(W)-2:

http://www.aae.uiuc.edu/m-selig/ads/aircraft.html

(Scroll down to "Stoddard-Hamilton.")

However, this page suggests that at least some Glasairs
used the LS(1)-0413

http://www.oriontechnologies.net/Documents/Airfoil.htm

As for finding the zero-lift alpha, there are probably Web
applets out there that can do that for you. I used to use the one at
Martin Hepperle's Web site:
http://www.mh-aerotools.de/airfoils

Bob K.
http://www.hpaircraft.com