Soft in-plane rotor hub

B - Operations – Transporting – 64 – C

Patent

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Details

B64C 27/51 (2006.01)

Patent

CA 2533523

A rotor hub assembly for a rotary-wing aircraft has a central member and a plurality of blade grips adapted for attaching rotor blades to the central member. The blade grips are pivotally attached to the central member and are capable of pivoting about a pivot axis generally normal to a plane of rotation of the blades. The pivoting allows for in-plane motion of the blades relative to the central member. A damper is operably connected to each blade grip for damping the in-plane motion of the associated blade, each damper being selectively switchable between at least two spring rates.

L'invention concerne un ensemble moyeu rotor pour un aéronef à ailes rotatives présentant un élément central et une pluralité de poignées de pale conçues pour fixer les pales du rotor à l'élément central. Lesdites poignées de pale sont fixées de manière pivotante à l'élément central et sont capables de pivoter autour de l'axe pivot généralement normal à un plan de rotation des pales. Le pivotement permet un mouvement dans le plan des pales par rapport à l'élément central. Un amortisseur est fixé de manière fonctionnelle à chaque poignée de pale pour amortir la mouvement dans le plan de la pale associée, chaque amortisseur pouvant être commuté de manière sélective entre au moins deux constantes de rappel de ressort.

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