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 ...

Electrification is seen as having an important role to play in the fossil-free aviation of tomorrow. But electric aviation is battling a trade-off dilemma: the more energy-efficient an electric ...

Blade pitch control is handled by a central hub that works a bit like the swashplate in a helicopter; when it's moved off-axis, it changes the pitch of all blades as the barrel rotates, such that the ...