tri-star airfoil

nevermind... looks kinda like a clark-y. I'll go with that.

I once asked Bruce Tharpe about the airfoils used on some old Sig models... He told me most were "FC&R" design....

"FC&R??",sez me....

"French Curve & Ruler"....

Bill

A subset of TLAR

That Looks About Right.

LOL!!! funny you should mention that. Whilst doing my research, i did come across many references that tended to corroborate TLAR... tho certainly wasn't worded that way.

model airplanes aren't all that fussy, it seems. Airfoil selection apparently really only matters when extracting the utmost efficiency is important... sailplanes, for example.

rocann>> I once asked Bruce Tharpe about the airfoils used on some old Sig >> models...

The other well-known airfoil family is the BATA series - when you don't have a french curve the sole of your shoe will have to do.

Then again, I don't really believe any of that. As to airfoils not mattering much in another post here - I'll take that with a massive boulder of salt. Basic design being within reasonable parameters, I believe as Dave Thornburg stated in his book: "the airfoil is the airplane". I've scratch built designs of mine with different airfoils - and I don't mean one with an 18% thick symmetrical and another with a thin airfoil with 9% camber - and been astounded at the difference in flying characteristics. A good example was a

MJD