B - Operations – Transporting – 64 – C
Patent
B - Operations, Transporting
64
C
244/15
B64C 27/32 (2006.01) B64C 27/33 (2006.01) B64C 27/51 (2006.01)
Patent
CA 1209558
Abstract: The present invention relates to a soft inplane bearingless rotor which is to be rigidly mounted on a helicopter mast. The rotor is comprised of a unitary yoke which has a flat hub section adapted to be anchored to the end of the mast and has diametrically opposed blade-supporting arms which extend from the hub section. Each arm has a thin flapping section adjacent the hub section and a feathering section which extends from the flapping section. Blade attachments are located at the end of each of the arms. The arms include a plurality of fiber reinforced composite parallel ribs which extend span-wise with a predetermined inplane spacing. A blade is secured to each attachment with a cuff which extends inboard to the flapping section. A bearing structure interconnects the inboard end of the cuff and the flapping section and includes an inplane resilient structure for soft inplane restraint of the blade.
431061
Broekhuizen Willem
Covington Cecil E.
Metzger Robert W.
Neathery William D.
Reyes Peter A.
Bell Helicopter Textron Inc.
Kirby Eades Gale Baker
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