Anti-torque device with shrouded rotor and straightening stator for helicopters.

摘要

The rotor consists of a multi-blade rotor and an air flow rectifier stator situated coaxially in an air flow channel in the helicopter tail. The stator comprises a central annular body (14) surrounding the rotor transmission mechanism and fixed blades (9) with an aerofoil section to turn the air flow from the rotor parallel to the axis of the channel. The rotor drive transmission mechanism is enclosed in a housing (17) with radial reinforcing arms (19) connected to one another by a rim equipped with fixings for the stator's central housing (14). The stator blades are made from a composition material with a foam core and a reinforcement of short fibres embedded in a synthetic resin matrix. Each blade can be made by transfer moulding an epoxy resin onto woven fibre mat, or by using fibre mat pre-impregnated with the synthetic resin. The stator blades and housing can be moulded in one piece. <IMAGE>