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THE
PIPER
COMANCHE
SECTION 11
Installed in the instrument panel is a Fuel Flow Indicator.
This instrument is connected to the flow divider and
monitors
fuel pressure.
The
instrument
converts
fuel pressure
to an
accurate indication of fuel flow in gallons per hour, percentage
of cruise power,
and proper
leaned
mixture
for take-off at
various altitudes.
NOTE
An increasingor abnormally high fuel flow
indication
is a possible
symptom of re-
stricted injector lines or nozzles.
Induction air for either engine enters an opening inthe nose
cowl below the propeller and is picked up by a large air duct.
The air is directed through a filter and on to the carburetor or
servo regulator.
For the fuel injection installation,
located in
the air box at the throat of the servo regulator isa springloaded
door which opens automatically if the filter becomes
blocked.
STRUCTURES
Structures
are of sheet aluminum
construction,
and are
designed to ultimate load factors well in excess of normal re-
quirements.
All components
are completely
zinc
chromate
primed,
exterior
surfaces
are coated
with acrylic
lacquer.
The main spars of the wings are joined with high strength
butt fittings in the center of the fuselage,
making
in effect a
continuous main spar.
The spars are attached to the fuselage
at the side of the fuselage and in the center
of the structure;
wings
are also attached at the rear spar and at an auxiliary
front spar.
Wing airfoil sectionisa laminar flow type, NACA-64,A215,
modified,
with minimum thickness about 40% aft of the
leading
edge. This permits the main spar, located at the point of max-
660201
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