PILOT’S OPERATING HANDBOOK
SECTION 7
DESCRIPTION
Edition 0 -- October 31, 2013
Rev. 1
Page 7.6.10
Propeller overspeed limiter
Propeller overspeed limiter is installed on left side of the reduction gear box. It prevents a propeller overspeed in
case of main propeller governor failure.
Propeller overspeed limiter is equipped with a solenoïd which makes feather the propeller when the throttle is in
condition mode.
Torque limiter
Torque limiter is located on right side of the reduction gear box. It is rated to limit engine torque to 109 % at sea
level.
PROPELLER
Airplane is equipped with an all-metal, four-bladed, constant-speed and full-feathering propeller.
Regulation
Propeller governor located on engine maintains rotation speed to the nominal value of 2000 RPM. Regulation is
obtained through propeller blade pitch variation : counterweights drive propeller blades toward high pitch
(low RPM) whereas oil pressure delivered by governor drives back blades toward low pitch (high RPM).
Propeller governor allows feathering either by voluntary pilot action via throttle (Condition mode) or automatically
in case of engine failure or shutdown.
Propeller reverse pitch allows reduced taxiing speed or landing roll. Change from idle to reverse position is
performed with throttle (Thrust mode) (Refer to Paragraph ”ENGINE CONTROLS”).
Содержание TBM 900
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