But at some point in the cam’s rotation, the push rod will have pulled the coupling piece in the direction of the propeller far enough such that the coupling piece can pivot down. But the gun ...

The PIV and hotwire measurements can be synchronized with both the blade rotation phase (i.e., phase-locked) using the encoder fitted to the electric motor and with the far-field microphone arrays.

Theoretically, a three-bladed propeller, rotating at a certain rate of speed in undisturbed water, should exert a, constant thrust. But, in the case of steamship propulsion, the propellers ...

A delivery company has had to re-design its drones after a propeller came off and hit a man in the head, narrowly missing his ...

Drones fly while rotating multiple propellers at high speed, which makes a loud buzzing noise during flight. Some drones have reduced noise by devising the shape of the propellers. In the 'Slow ...