Soft inplane helicopter rotor

Details Soft inplane helicopter rotor Soft inplane helicopter rotor

1978-09-11

1981-03-24

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

Nonmetallic resilient mounting

416140, 416141, B64C 2738

Patent

active

042577390

ABSTRACT:
A helicopter rotor hub assembly (10) in which a blade grip (30) extends inboard of a yoke (14) and transfers centrifugal forces to the yoke (14) through a spherical elastomeric bearing (38). Pitch change of the grip (30) and blade (32) is accommodated by the spherical elastomeric bearing (38) which also acts as the pivot point for lead-lag motion of the blade (32) and grip (30). A lead-lag damper (22) is located inboard of the elastomeric bearing (38) and is connected between one end of the grip (30) spaced away from the lead-lag pivot and the yoke (14) for damping the lead-lag motion between the grip (30) and yoke (14).

REFERENCES:
patent: 3026942 (1962-03-01), Cresap
patent: 3347320 (1967-10-01), Cresap et al.
patent: 3652185 (1972-03-01), Cresap
patent: 3926536 (1975-12-01), Ciastula et al.
patent: 3942910 (1976-03-01), Snyder et al.
patent: 3967918 (1976-07-01), Mouille et al.
patent: 4012169 (1977-03-01), Mouille et al.
patent: 4028002 (1977-06-01), Finney et al.
patent: 4099892 (1978-07-01), Martin
patent: 4129403 (1978-12-01), Watson
patent: 4135856 (1979-01-01), McGuire

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