NH Industries is working to deliver a solution to an issue with the main rotor head on NH90 military helicopters that means the blades can impact the tail structure when starting or stopping the ...

European research efforts to cut helicopter noise and vibration while improving fuel economy could be realised by building on a 1970s motor racing aerodynamics breakthrough, according to Dutch ...

LONDON—Leonardo Helicopters has begun ground tests of two active main rotor blade technologies, with the aim of flying both before this summer. The company is experimenting with an Active Gurney Flap ...

Specially shaped helicopter rotor blades with a kink at the outer part make it possible to reduce the radiating annoying rotor noise [1]. Against this background, the aeroelastic behaviour together ...