Piper CHEROKEE ARROW 200 Owner's Handbook Manual page 12

SECTION II
CHEROKEE "ARROW"
pressure is maintained above most vapor forming conditions while
fuel inlet pressure is low enough to allow use of a diaphragm
pump. The servo system feature also checks vapor lock and
associated starting problems.
The servo regulator meters fuel flow proportionally with air-
flow and maintains the mixtures as manually set for all engine
speeds. The fuel flow divider receives metered fuel and dis-
tributes fuel to each cylinder fuel nozzle.
The fuel flow portion of the manifold pressure fuel flow
gauge is connected to the flow divider and monitors fuel pres-
sure. This instrument converts fuel pressure to an indication of
fuel flow in gallons per hour and percentage of rated horsepower.
The alternate air source of the induction system contains a
door that functions automatically and/or manually. If the primary
source is obstructed, the door will open automatically. It may be
opened manually by moving the selector on the right side of the
quadrant. The primary source should always be used for take-off.
STRUCTURES
All structures are of aluminum alloy construction and are
designed to ultimate load factors well in excess of normal re-
quirements. All exterior surfaces are primed with etching primer
and painted with acrylic lacquer.
The wings are attached to each side of the fuselage by in-
serting the butt ends of the respective main spars into a spar box
carry-through, an integral part of the fuselage structure, thus
providing in effect a continuous main spar which splices at each
side of the fuselage. There are also fore and aft attachments at
the rear spar and at an auxiliary front spar.
The wing airfoil section is a laminar flow type,
NACA6~-
415 with the maximum thickness about 40% aft of the leading
edge. This permits the main spar carry-through structure to be
located under the rear seat providing unobstructed cabin floor
space ahead of the rear seat.
6
690203