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THE PIPER CHEROKEE
SEC NII
SECTION II
DESIGN INFORMATION
ENGINE AND PROPELLER
The Cherokee is powered by a Lycoming engine of either
150, 160 or 180 H. P. (Refer to power plant specifications on
page 1) Each engine is furnished with a starter, 35 ampere 12
volt alternator, voltage regulator, shielded ignition, vacuum
pump drive, fuel pump and a dry, automotive type carburetor
air filter.
The exhaust system is of the cross-over type to reduce back
pressure and improve performance. It is made entirely from
stainless steel and is equipped with dual mufflers. A heater
shroud around the mufflers is provided to supply heat for both
the cabin and carburetor de-icing.
The Sensenich fixed-pitch propeller is made from a one-
piece alloy forging. Refer to the Power Plant Specifications on
page 1 for the model of propeller used with each engine.
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 enamel.
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 which is an integral part of the fuselage
structure, providing in effect a continuous main spar with splices
at each side of the fuselage. There are also fore and aft attach-
ments at the rear spar and at an auxiliary front spar.
The wing airfoil section is a laminar flow type, NACA
652-415 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
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