Traditional helicopters are also far more efficient in normal cruising forward flight. They can glide quite well, which is how you can safely land in the case o

Traditional helicopters are also far more efficient in normal cruising forward flight. They can glide quite well, which is how you can safely land in the case of engine failure [0] [0] http://en.wikipedia.org/wiki/Autorotation_(helicopter) http://en.wikipedia.org/wiki/Autorotation_(helicopter)