Variable-pitch drives are the simplest of all mechanical adjustable-speed mechanisms. Variable-pitch drives are the simplest of all mechanical adjustable-speed mechanisms. Most of these drives use ...

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 ...

A closer look at the variable pitch mechanism which could change the pitch of the blades for greater or lesser “bite” through the air. Airplanes have different needs in terms of power during ...

It takes petrol power – and a clever variable pitch rotor system that makes this gas-powered drone just as stable, quick and responsive as its electric brethren. Scaled up, it could carry 200 kg ...

which is especially unique a it uses a central heavy-fuel propulsion system piloted through a variable-pitch mechanism. The operational advantage of the multicoptor includes flight duration and ...

Interior of Turnbull's workshop, 1919, when his efforts to solve the problem of a variable-pitch propeller were in full swing. (Wallace Rupert Turnbull fonds, Turnbull-53, New Brunswick Museum ...