Dual trunnion hub-to-mast assembly

B - Operations – Transporting – 64 – C

Patent

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Details

B64C 27/35 (2006.01) B64C 11/04 (2006.01) B64C 27/82 (2006.01)

Patent

CA 2445517

The present invention comprises an apparatus for mounting two or more tail rotor hubs to a tail rotor mast (30) .The apparatus comprises a mast (30) having an externally-splined inboard section (96) shaped and sized to mate with an internal spline on an inboard trunnion (92) .The inboard trunnion (92) is mechanically fixed to the one or more outboard hubs via a torsionally-rigid connection (98) .The outboard portion of the mast (30) is designed to have reduced torsional stiffness, so that torque is transmitted to the outboard trunnions (90) through the inboard trunnion (92) rather than through the mast (30).

La présente invention concerne un appareil permettant de monter deux ou plusieurs moyeux rotor à un mât à rotor de queue (30). L'appareil comprend un mât (30) présentant une section intérieure à cannelures externes (96) conformé et dimensionné de manière à s'accoupler à une cannelure interne sur un tourillon intérieur (92). Le tourillon intérieur (92) est mécaniquement fixé à un ou des moyeux extérieurs par l'intermédiaire d'un raccordement résistant aux déformations de torsions (98). La portion extérieure du mât (30) est agencé à présenter une rigidité de torsion réduite, de sorte que le couple soit transmis aux tourillons extérieurs (90) à travers le tourillon intérieur (92) plutôt qu'à travers le mât (30).

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