Quote:
Originally Posted by All Darc
Nasa also found that with many small electric propeller anlong a wings, they need much less energy to take off than with two large propellers.
|
I'd be curious to read that paper. More propellers are usually inefficient. Heck, even more propeller blades tend to be less efficient. The most efficient helicopters use 2 blades.
This is a big reason why drones aren't efficient. That, and they aren't aerodynamic in forward flight.