Flapping stop device for a gyroplane rotor

Details Flapping stop device for a gyroplane rotor Flapping stop device for a gyroplane rotor

1986-07-16

1988-04-12

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Including movement limit stop or damping means

416134A, B64C 2738

Patent

active

047370750

ABSTRACT:
The flapping stop device of the invention is intended for a gyroplane rotor comprising a hub (3) to which each blade (22) is connected by retaining and pivoting members (16) having two frames, one (17) of which is fixed to the hub (3) and the other (19) of which, in an internal radial position with respect to the first one, is locked for movement with the root (23) of the blade (22). The internal frame (19) has, projecting radially inwardly, at least one nose piece (29) having a stop surface and defining a convex cylindrical sliding surface (28) on the internal radial face of the frame (19). The nose piece or pieces (29) and the convex surface (28) cooperate respectively with one or more bearing surfaces (34) and a complementary concave surface (33) of a central stop (30) integral with the hub (3) or with the rotor mast (2).

REFERENCES:
patent: 3556673 (1971-01-01), Killian
patent: 3761199 (1973-09-01), Ferris et al.
patent: 4135856 (1979-01-01), McGuire
patent: 4249862 (1981-02-01), Waddington et al.
patent: 4297078 (1981-10-01), Martin
patent: 4304525 (1981-12-01), Mouille
patent: 4361415 (1982-11-01), Aubry
patent: 4375940 (1983-03-01), Lovera et al.
patent: 4504193 (1985-03-01), Mouille
patent: 4512717 (1985-04-01), Pancotti et al.
patent: 4549851 (1985-10-01), Pariani

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