The concept is based on the rotor's ability to develop lift on the blade that advances in the direction of flight, relieving of this duty the retreating blade that goes in the opposite direction.

Memories of flying and the guys he flew with came flooding back for former pilot Berchman Richard of Alexandria after seeing ...

Nonlinear dynamics behaviors of a rotor roller bearing system with radial clearances and waviness considered. Chin J Aeronaut 2008; 21: 86–96. 5. Rajesh S, Mihir KG and Raj KP. Vibration analysis of ...

The third scheme is a coaxial rotor helicopter with rigid rotors and an additional pusher propeller called the propulsion propeller.

“They wanted a state-of-the-art helicopter gunship, and Lockheed built one using a completely new different rotor system called the rigid rotor, which was totally different from any other kind ...