Helicopter main gearbox has a driven collector wheel that can be used with any of at least two exchangeable rotor masts of different diameters

摘要

Helicopter gearbox (1) has a driven collector wheel (6) in the form of an annular gear with a rotor mast (3') connected to it in an irrotational manner. The collector wheel can be used with any of at least two exchangeable rotor masts, said rotor masts having different diameters.