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 ...

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 ...

Cirrus SR20 and SR22 aircraft feature a single "power lever" that combines the functions of traditional throttle and propeller controls to simplify operation. This integrated system reduces pilot ...