MOONEY SECTION VII
MODEL M20J AIRPLANE AND SYSTEMS DESCRIPTION
11.
ELECTRIC TRIM SWITGHICIRCUIT BREAKER (IF INSTALLED)
This switch is normally left in the
ON
position and serves as both a circuit
protector and as a master disconnect for the electric trim system in the event
of a malfunction.
12.
OPTIONAL
13.
THROTTLE CONTROL
Pushing the throttle control forward increases the manifold pressure thereby
increasing the engine power. Pulling the control aft decreases the manifold
pressure thereby decreasing the engine power.
14.
PROPELLER CONTROL
Pushing the propeller control forward increases engine RPM; pulling the con-
trol aft decreases the engine RPM. The control is of the vernier type and fine
adjustments of RPM can be obtained by turning the knob clockwise to in-
crease RPM and
countercloclwise to decrease RPM. The knob should not
be turned in any closer than
118"
to the panel nut face.
15.
MIXTURE CONTROL
The mixture control allows the pilot to adjust the fuel-air ratio (mixture) of the
engine. Pushing the control forward
richens the mixture. Pulling the control
full
aR closes the idle cutoff valve shutting down the engine. The control is of
the vernier type and fine adjustments of the mixture can be obtained by turn-
ing the knob clockwise to
richen the mixture, and counterclockwise to lean.
The knob should not be turned in any closer than
118" to the panel nut face.
16.
COWL FLAP SWITCH
The cowl flap switch activates the electric cowl flap actuator (motor) to open
and close the cowl flaps. Placing the switch in the lower position opens the
cowl flaps. This allows additional airflow to properly cool the engine on the
ground and during lowspeed, high power climbs. During cruise, placing the
switch in the upper position closes the cowl flaps reducing the airflow
through the engine. When full open or closed is selected the actuator will
automatically shut off when the cowl flaps have reached that position. The
switch will remain in that selected position. To keep oil and cylinder head
temperatures within the normal operating ranges (green arc of the tempera-
ture gauges) the cowl flaps may be positioned at any angle from closed to
full open. This may be accomplished by momentarily positioning the switch
in either the upper or lower position. When the cowl flaps have reached a
desired intermediate position, as shown on the indicator, place the switch to
the center
(OFF)
position.
17. PARKING BRAKE
6C)NTRC)L
Depressing the brake pedals and pulling the parking brake control sets the
parking brake. Pushing in the parking brake control releases the parking
brake.
REV.
B
6-12-87
ISSUED 6-2-86
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