Hi everybody, I just really wish I could view your intersting replies without the very very long "quotes" that come automaticly.. so could you please just delete the unnessesary quotos ?

any way.. the efficiency right now for me is the developed "static thrust" per horsepower" helicopter are good at but their complicated cyclcic and collective mechanincs and the very huge rotors takes down the efficiency( my opinion only) so what i am simply looking for is a simple propeller that is shafted to a motor (with or without gears) that is not too large for its thrust..

q-tips propellers are coming closer to that and that is why the fan I made with side portions was quite compared to other conventional rc propellers

did you check this?:
http://www.linkgrinder.com/Patents/D...r_7396208.html

it is new and simple propeller claimed to produce 200 pounds of static thrust at a 85cm diamter with a 30hp!

as i said I would appreciate if we could talk about efficieny of propellers
thanx
Kalle