PatentDOI
Vibration isolation system
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A vibration isolation system for a passenger carrying helicopter with which the crew seats in the cockpit area and the floor in the passenger area are decoupled from the airframe is presented in this paper.Abstract:
A vibration isolation system for a passenger carrying helicopter with which the crew seats in the cockpit area and the floor in the passenger area are decoupled from the airframe thereby isolating the seats and floor from the airframe vibrations. In addition, the fuel tanks of the helicopter are isolated from the airframe so that a force feedback from the fuel tank to the airframe resulting from the changing fuel quantity is effectively eliminated. The system employs nodal isolators which both isolate (decouple) and support the particular structural mass in question.read more
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Rotary wing pylon mounting system
TL;DR: In this article, a pylon mounting system that employs four non-resilient links to support the pylon on the fuselage is presented, where the longitudinal axes of the links intersect at a predetermined point along the mast axis below or above the normal mounting plane.
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TL;DR: In this paper, a helicopter having a lift unit including a multiblade helicopter main rotor system and a nodalized module including a beam driven in response to blade developed vertical forces has a fuselage unit connected to the beam only at vibration nodal points along the beam.
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Helicopter vibration isolation
TL;DR: In this article, a helicopter in which vibration is minimized by use of a lift unit including a multiblade helicopter main rotor system mounted to drive a nodalized module comprising structure which vibrates in response to blade developed vertical forces.