http://aviation.stackexchange.com/questions/5191/how-does-the-efficiency-of-a-fixed-wing-compare-to-a-rotary-wing http://aviation.stackexchange.com/questions/51

http://aviation.stackexchange.com/questions/5191/how-does-the-efficiency-of-a-fixed-wing-compare-to-a-rotary-wing http://aviation.stackexchange.com/questions/5191/how-does-th...