Comanche rotor begins whirl testing

Whirl testing has begun on the RAH-66 Comanche helicopter's bearingless main rotor (BMR) system at Sikorsky's 7,450kW (10,000hp) main-rotor whirl stand in Stratford, Connecticut. The tests will evaluate rotor performance, durability and aeromechanical stability, according to the Boeing Sikorsky Comanche Team. The BMR will also undergo a 100h endurance run ...