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 ...

Airplane propellers are primarily categorized into fixed-pitch, which are simple and low-cost but offer a performance compromise, and variable-pitch types, designed to optimize thrust and engine load ...

A Thunder Bay innovator has landed a deal with a U.S. defence contractor that could take his small aviation firm soaring to new heights. Andrew Kondor, president of Aerovate, has sold two units of his ...

At the SMM exhibition and conference in Hamburg, Germany, Wärtsilä is introducing its latest development of large Controllable Pitch (CP) Propellers, based on the previously known E-hub type. The new ...

The propeller component of this assembly was manufactured by Ole Flottorp in Chicago, Illinois for James B. Lund and R.D. Dwight, also of Chicago, who designed and constructed a mammoth tandem ...

What does it take for a quadcopter to carry a 10-kg (22-lb) payload and fly for three hours straight? It takes petrol power – and a clever variable pitch rotor system that makes this gas-powered drone ...

Controllable-pitch propellers have been developed and produced on the Baltic coast of Germany since 1962 – initially in Rostock, and then in Wismar from 1964. The first units were manufactured for 86 ...