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 ...

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 ...

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 ...

When it’s time to buy a new propeller for your boat, diameter and pitch are the most important characteristics to research. To be able to select or upgrade to a new propeller, you must understand ...

Most propellers reverse direction to go astern, but controllable pitch propellers just twist their blades instead, keeping ...

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 ...

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 ...

Airplane propellers are broadly categorized into fixed-pitch, which are simpler and have a set blade angle, and non-fixed-pitch types (e.g., constant-speed, ground-adjustable, controllable-pitch) that ...

You’ve used a boat payment calculator to secure the ship of your dreams, tackled the open waters, and enjoyed every minute of it. Now, the time has come to buy a new propeller. If this is your first ...