Fluid reaction surfaces (i.e. – impellers) – Plural impellers having relative movement or independent...
Patent
1992-07-24
1993-12-14
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Plural impellers having relative movement or independent...
416124, 244 1719, 244 1721, B63H 508, B63H 510
Patent
active
052696545
ABSTRACT:
In a preferred embodiment, a tail rotor assembly for a helicopter, which includes: a first rotor disposed on a first side of the distal end of a tail boom of the helicopter and rotatable in a first geometric plane; and a second rotor disposed on a second side of the distal end of the tail boom, the second rotor being rotatable in a second geometric plane.
REFERENCES:
patent: 2514205 (1950-07-01), McDonald
patent: 2514206 (1950-07-01), Perry
Crozier John H.
Look Edward K.
Sgantzos Mark
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