Twin tension/torsion beam rotor system
First Claim
1. A rotor system for mounting rotor blades to a helicopter, comprising:
- a rotor hub having at least two sets of mounting lugs, each set including a plurality of adjacent lugs each containing an aperture;
a support fitting for each set of mounting lugs, each said support fitting including a plurality of adjacent lugs each containing an aperture,each set of mounting lugs and the lugs of a respective support fitting being engaged such that their respective apertures are aligned to receive a hinge pin forming thereby a flap hinge;
a plurality of elongated blade pitch varying means each connected at one end to a respective support fitting, and each defining a clevis for receiving a rotor blade securing pin forming thereby a fold hinge; and
a compound curved, continuous loop twin tension/torsion beam, double wrapped around the flap hinge at one end and double wrapped around the fold hinge.
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Accused Products
Abstract
A rotor system for a helicopter including a tension/torsion component which is fabricated from composite material and as a compound curved, continuous loop twin tension/torsion beam. Each end of the twin tension/torsion beam includes two curved (wrapped) ends which are oriented substantially orthogonally. At one end the curved ends extend about the flap hinge, and at the other end the curved ends extend about the fold and lead/lag hinge of the rotor system. To accommodate the twin tension/torsion beam at the flap hinge a support fitting is provided with lugs which are made compatible with the rotor hub lugs, and to accommodate the twin tension/torsion beam at the fold and lead/lag hinge a pitch varying structure is provided with twin beam engaging clevis surfaces.
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Citations
14 Claims
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1. A rotor system for mounting rotor blades to a helicopter, comprising:
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a rotor hub having at least two sets of mounting lugs, each set including a plurality of adjacent lugs each containing an aperture; a support fitting for each set of mounting lugs, each said support fitting including a plurality of adjacent lugs each containing an aperture, each set of mounting lugs and the lugs of a respective support fitting being engaged such that their respective apertures are aligned to receive a hinge pin forming thereby a flap hinge; a plurality of elongated blade pitch varying means each connected at one end to a respective support fitting, and each defining a clevis for receiving a rotor blade securing pin forming thereby a fold hinge; and a compound curved, continuous loop twin tension/torsion beam, double wrapped around the flap hinge at one end and double wrapped around the fold hinge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification