TBM
PILOT’S OPERATING HANDBOOK
700
SECTION 7
DESCRIPTION
Page 7.6.12
Edition 1 -- November 30, 2010
Rev. 0
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 selected by
pilot with propeller governor lever. 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 the
propeller governor lever 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 power lever (Refer to
Paragraph ”ENGINE CONTROLS”).
Propeller overspeed regulator tests
(Figure 7.6.3)
”PROP O’SPEED TEST” push--button located on instrument panel near
propeller speed indicator is used on ground to check proper operation of
propeller overspeed regulator. This push--button activates a solenoïd,
attached on propeller overspeed regulator, which limits propeller rotation
speed when power lever is positioned forwards.