Fluid reaction surfaces (i.e. – impellers) – With weight-balancing means – Self-shifting or selectively adjustable mass
Patent
1997-08-28
1999-09-21
Verdier, Christopher
Fluid reaction surfaces (i.e., impellers)
With weight-balancing means
Self-shifting or selectively adjustable mass
416500, 74574, B64C 2706, B64C 2732
Patent
active
059544805
ABSTRACT:
A vibration isolator (20) operative for reducing vibration active on a main rotor (12) of a rotorcraft. The vibration isolator (20) includes a hub attachment fitting (22) secured in combination with the main rotor (12) and a spring-mass system (24) mounting to and rotating with the hub attachment fitting (22). The vibration isolator (20) is characterized by the spring-mass system (24) having a fairing (44) operative to aerodynamically contour the spring-mass system (24) while providing a portion of the working mass thereof. Other features of the vibration isolator include adapting the hub attachment fitting (22) to accept hub-mounted rotor systems (36), provide access to the rotor hub mounting attachment (34), and provide a motion limiting portion (74) for reducing loads acting on the spring-mass system (24).
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Frederickson Kirk C.
Krauss Albert T.
Miner Frederick J.
Schmaling David N.
Collins Brian A.
Sikorsky Aircraft Corporation
Verdier Christopher
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