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Mooney Aircraft MARK 21 - Page 24

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perature. From the junction box, air
is
ducted to the pilot and
copilot's feet, windshield defroster, rear passengers' feet, and
to the baggage compartment.
Deflectors are provided on the pilot and copilot outlets which
can be used to direct the air flow in
ehe desired direction or
to provide individual volume controls. When these deflectors
ar? in the neutral or "off" position, the air flow
is
forced to
the windshield defrosters and to the aft outlets.
consists of a retractable air scoop
on top of the cabin
seciion which supplies four individually con-
trolled ceiling outlets. The scoop control knob, located above
the pilot,
is
turned counter-clockwise to open (extend) the scoop
so obtain ram air. To minimize drag, open the scoop only
enough to
obtain sufficient air flow at all outlets. The outlets
can be controlled individually
by
turning the inner knob to
ad-
just the air volume, and rotating the deflector to obtain
air
flow
in
the desired direction.
Left
Side
Air Scoop
-
scoop has one outlet which has
a
volume con-
trol and can be adjusted
directionally. This scoop also has two
outlets behind the upholstery panel which provide a source of
air for radio cooling.
Radio Cooling Outlet
In addition to the outlets on the left scoop for radio cooling
tubes, the right side flush air scoop provides air for the radio
vent grill which
is
mounted on the firewall, directly forward of
the center radio panel. This grill directs air aft
to
insure suf-
ficient air flow to prevent multiple radio installations from
overheating. The tube supplying the grill has a control valve
near the scoop to decrease air flow in extremely cold weather.

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