Counter-torque device for a helicopter

Details Counter-torque device for a helicopter Counter-torque device for a helicopter

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 5/00 (2006.01)

Patent

CA 2574108

A ducted fan for a helicopter includes a transverse duct and a counter-torque device supported within the duct. The counter-torque device includes a rotor rotatably mounted within the duct and a stator fixedly mounted within the duct downstream from the rotor. The rotor includes a rotor hub having a rotor axis, and rotor blades extending from the hub. The Rotor blades have a modulated angular distribution about the rotor axis. The stator includes a stator hub, and a plurality of stator vanes distributed around the stator hub. The stator vanes are angularly modulated around the stator hub.

L'invention concerne une soufflante carénée pour hélicoptère comprenant un conduit transversal et un dispositif anticouple supporté par ledit conduit. Le dispositif anticouple comprend un rotor monté, de manière rotative, dans le conduit et un stator monté, de manière fixe, dans ledit conduit en aval du rotor. Ledit rotor comprend un moyeu de rotor doté d'un axe de rotor, et des pales s'étendant à partir du moyeu de rotor. Les pales de rotor présentent une répartition angulaire modulée autour de l'axe de rotor. Le stator comprend un moyeu et une pluralité d'aubes de stator réparties autour du moyeu de stator. Lesdites aubes de stator sont modulée angulairement autour du moyeu de stator.

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