Airfoil naca nunmber?
Airfoil naca nunmber?
(OP)
Can someone suggest a Naca 4 or 5 digit airfoil design that has shown good low speed lift with reasonable drag coeficient? The design I have at the present time would be close to a 6315. Low speed meaning less than 120 mph.





RE: Airfoil naca nunmber?
At the speed you suggest, I would take a look at what Burt Rutan used for his Voyager aircraft (somewhere I read it is a Roncz design?), and perhaps some other light sport aircraft kit builders. There are sailplanes that operate up to 120 mph, but not very many "cruise" there.
RE: Airfoil naca nunmber?