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THIS IS AN UNCONTROLLED DOCUMENT.
THIS ELECTRONIC DOCUMENT MAY HAVE BEEN SUPERCEDED.
THE MOST CURRENT DOCUMENT INFORMATION IS AVAILABLE
FROM YOUR BELL HELICOPTER TEXTRON REPRESENTATIVE.
PRODUCT DATA JANUARY 2003
TRANSMISSION
The transmission is an upgraded version of the Bell 230 transmission. The cases have
been machined to accept wider face width gears and larger capacity bearings.
The transmission is mounted on the cabin
roof just forward of the power plant. It
accepts and combines power from the two
engines to drive the main and tail rotors.
Each outboard power input quill
(sometimes referred to as "KNUCKLE")
incorporates a
sprag-type freewheeling
clutch to permits single engine operation.
An inoperative engine does not become a
burden as the other engine takes automatic
action to compensate for the loss of power.
Additionally, the clutches insure
continued
operation of the tail rotor and transmission
mounted accessories (hydraulic pumps)
during autorotation or single engine
flight.
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