Coaxial counter-rotating rotor system

摘要

A system and method to tilt coaxial counter-rotating rotor hub assemblies relative to a fuselage. The system includes a first rotor hub assembly and a second rotor hub assembly spaced apart from the first hub assembly and carried by the fuselage. The method includes pivotally attaching the first rotor hub assembly and the second rotor hub assembly to a pivot joint and thereafter tilting the first rotor hub assembly and the second rotor hub assembly about the pivot joint with a driver.

主权项

1. A helicopter, comprising:
a fuselage; an engine carried within the fuselage; a transmission rotatably coupled to the engine and completely disposed within the fuselage and pivotally attached to the fuselage via a pivot joint, the transmission being configured to pivot within the fuselage; and a rotor system positioned above the fuselage, the rotor system having:
a first rotor hub assembly;a second rotor hub assembly spaced apart from the first hub assembly;a plurality of rotor blades coupled to both the first hub assembly and the second hub assembly;a rotor mast rotatably engaged with the transmission and attached to both the first rotor hub assembly and the second rotor hub assembly; anda driver operably associated with the transmission; wherein, during flight, the engine rotates the rotor system via the transmission, while the driver pivots the transmission within the fuselage, which in turn tilts the first rotor hub assembly and the second rotor hub assembly relative to the fuselage.