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 broadly categorized into fixed-pitch, which offer a performance compromise (climb or cruise but not both), and variable-pitch types, which allow for in-flight optimization. The ...

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 ...

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 ...

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 ...

Presentation of the DNV GL certificate by Dr. Olaf Richter (right) in the presence of his inspector, Dieter Ekat (2nd from left) who supported the test series, to Piening boss Mathias Pein (2nd from ...

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 ...