Quadcopters tend to have very poor efficency because of their high disk loading. High disk loading– that is, how much weight each square meter of area swept by the propellers must carry–is almost ...

Barring the smallest manned airplanes, most aircraft that are pulled around by a prop have variable pitch propellers. The reason for this is simple efficiency. Internal combustion engines are most ...

The FAA has issued a Special Airworthiness Information Bulletin (SAIB) to alert operators, pilots, and aircraft manufacturers of concerns for an optimum response to a propeller overspeed in piston ...