Title:
VIBRATION ISOLATOR FOR ROTORCRAFT
Document Type and Number:
WIPO Patent Application WO1999010233
Kind Code:
A3
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 means (74) for reducing loads acting on the spring-mass system (24).
Inventors:
SCHMALING DAVID N
MINER FREDERICK J
KRAUSS ALBERT T
FREDERICKSON KIRK C
MINER FREDERICK J
KRAUSS ALBERT T
FREDERICKSON KIRK C
Application Number:
PCT/US1998/017140
Publication Date:
May 06, 1999
Filing Date:
August 18, 1998
Export Citation:
Assignee:
SIKORSKY AIRCRAFT CORP (US)
International Classes:
B64C27/00; B64C27/04; B64C27/32; B64C27/51; (IPC1-7): B64C27/04; B64C27/00
Foreign References:
| US4212588A | 1980-07-15 | |||
| US3056456A | 1962-10-02 | |||
| US4596513A | 1986-06-24 | |||
| US4225287A | 1980-09-30 |
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