Counter-rotating engines and contra-rotating propellers provide solutions to mitigate the effects of engine failure and ...

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.

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 action of a propeller is that of a rotating wing where the lift provided by the wing is the desired thrust for propulsion. The blades also have an associated drag which reduces the overall ...