Structure for cooling helicopter tail rotor gearbox

Details Structure for cooling helicopter tail rotor gearbox Structure for cooling helicopter tail rotor gearbox

1975-02-28

1976-06-29

Kunin, Stephen G.

Aeronautics and astronautics

Aircraft, heavier-than-air

Helicopter or auto-rotating wing sustained, i.e., gyroplanes

244 57, B64D 3310

Patent

active

039661458

ABSTRACT:
A structure is provided for cooling the tail rotor gearbox of a single rotor helicopter having an anti-torque tail rotor mounted to a vertical stabilizer. The gearbox is mounted within the vertical stabilizer inside an air passage passing through the stabilizer. An air inlet is located in the vertical stabilizer on the side thereof opposite the tail rotor. An exhaust orifice is positioned in the vertical stabilizer on the same side of the stabilizer as the tail rotor. In operation the pressure differential over the vertical stabilizer caused by the rotation of the rotor causes ambient air to enter the inlet, pass through the passage, over the gearbox, and exit from the exit orifice thereby cooling the gearbox.

REFERENCES:
patent: 2369652 (1945-02-01), Avery
patent: 2383038 (1945-08-01), Bossi
patent: 2447486 (1948-08-01), Burke
patent: 3506219 (1970-04-01), Mouille et al.

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