Diamond DA 40, Flight Manual

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DA 40 AFM
Airplane
Description
Doc. # 6.01.01-E Rev. 8 01-Dec-2010 Page 7 - 21
7.9.2 OPERATING CONTROLS
The engine performance is controlled by means of three levers: throttle, RPM lever and
mixture control lever, situated together as a group on the large center console (also
referred to as the throttle quadrant). Front and rear are defined in relation to the direction
of flight.
Throttle
- Left hand lever with large, black knob.
This lever is used to set the manifold pressure (MP). When the throttle is furthest forward,
the engine is being provided with extra fuel for high performance settings.
Lever forward (MAX PWR) = Full throttle, higher MP
Lever to rear (IDLE) = Idle, low MP
High manifold pressure means that a large quantity of fuel-air mixture is being supplied
to the engine, while low manifold pressure means a lesser quantity of fuel-air mixture is
being supplied.
RPM Lever
- Central lever with blue handle.
Lever forward (HIGH RPM) = High RPM, fine pitch
Lever to rear (LOW RPM) = Low RPM, coarse pitch
By means of this lever the propeller governor controls the propeller pitch and thus engine
RPM (= propeller RPM). A selected RPM is held constant by the governor independent
of the airspeed and the throttle setting ('Constant Speed').