Tail rotor authority control for a helicopter

Details Tail rotor authority control for a helicopter Tail rotor authority control for a helicopter

B - Operations, Transporting

64

C

B64C 27/82 (2006.01) B64C 27/57 (2006.01) B64C 27/78 (2006.01)

Patent

CA 2208400

An apparatus for interconnection in a helicopter tail rotor control linkage (32) for changing the pitch of the tail rotor blades (36) in response to predetermined inputs is provided. The apparatus comprises a linkage member (46) having a variable geometry, an actuator (54), and a control unit (56). In a preferred embodiment, the control unit (56) utilizes a microcontroller (216) to monitor inputs corresponding to ambient air condition and automatically vary the maximum tail rotor pitch so as to provide maximum tail rotor authority over a range of altitudes.

Appareil d'interconnexion de la timonerie de commande (32) du rotor de queue d'un hélicoptère, permettant de modifier le pas des pales (36) du rotor de queue en fonction de paramètres prédéterminés. L'appareil comporte un élément de timonerie (46) à géométrie variable, un vérin (54) et une unité de commande (56). Selon un mode de réalisation privilégié, l'unité de commande (56) fait appel à un microprocesseur (216) pour contrôler les paramètres correspondant à l'état de l'air ambiant et pour faire varier automatiquement le pas maximal du rotor de queue de façon à obtenir une maîtrise maximale du rotor de queue sur une certaine plage d'altitude.

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