I write about vertical flight aircraft technology & applications ... Later came variable-pitch propellers, where the angle of attack of the blades could be increased collectively to take a ...

“Constant-speed, manually feathering propellers on multiengine aircraft are equipped ... to start the engine with the propeller blades at a low pitch blade angle,” NTSB said.

Future electric aircraft will need to fly at relatively ... By adjusting a range of propeller parameters, such as pitch angle, chord length and number of blades, the team found a way to optimise ...

Dubbed the Maker, the aircraft is theoretically ... prop-rotors can also change their angle, affecting how much they bite into the air. “They’re variable pitch, so they can be really efficient ...

The company’s Cyclogyro, a reworking of a Voith-Schneider marine propeller for use in the ... the wings change pitch angle and create thrust, and since the hub can move 360° around the axis ...