ORIGINAL: antter
This thread is going for years and still not getting anywhere.
What about flat aerofoils on propellers of foamies? If profile of the wing doesnt matter, so should profile of propeller blade.
And if weight is zero, why one need wings? Helicopters have no wings and I bet they have greater than 1 thrust to weight ratio. They fly. Althogh CG placement probably matters for helis.
And hot air baloon fly too! No thrust and very lite indeed.
You're going to find that a lot said here doesn't relate to the topic particularly, or perhaps even at all, but provided somebody is learning something, who cares.
When I posted the following site, it was intended for beginners to go there to pick up a few tips on 'basic aerodynamics', and hopefully it's worked. That it has diversified from basic aerodynamics is of no real consequnece.
http://www.grc.nasa.gov/WWW/K-12/airplane/bga.html
Somebody made the point a few posts back that model design doesn't relate to full scale, and that's probably right, but one thing you can be sure of is that ALL obey the laws of aerodynamics even though that may be difficult to understand at times.
I enjoy dropping in fromtime to time and seeing how this has and is developing.