Drawing: Cobra Drawing: Cobra

Tail Rotor Gearbox

The tail rotor gearbox also know as the 90 degree gearbox is located at the top of the vertical fin. The purpose of the gearbox is to provide 90 degree change in direction of drive and a 2.6:1 speed (RPM) reduction between input and output drive shaft which mounts and drives the tail rotor. The gearbox also houses the pitch change mechanism, oil filler cap ( vent breather ), an oil level sight gauge, and a drain plug with a magnetic insert.

Drawing: 90 gearbox

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Updated: 12 January 2008
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Born on 23 February 1999