The Convair XFY-1 Pogo was a Navy VTOL interceptor built to launch and land vertically from tiny ship decks. It used a ...

Sikorsky engineers say the company's self-funded X2 advanced technology helicopter could reach 265kt (490km/h) or more in the next few months after a central sail fairing is installed on the rotor ...

Remember that Micro Mosquito RC helicopter from September? It used a coaxial rotor system of two contra-rotating blades to make flying it as easy as kidnapping a sedated seal on rollerskates. How many ...

Counter-rotating wind turbines (CRWTs) represent an innovative paradigm in wind energy conversion, employing a dual rotor mechanism in which two coaxial rotors spin in opposite directions. This ...