Section I Design Features - Continental Motors O-470-B Operator's Manual

SECTION I
DESIGN FEATURES
The engines have overhead valve cylinders with 5.00 inch bore, 4.00
inch stroke, 471 cubic inch displacement and a compression ratio of
7.0:1. The exception is a compression ratio of 8.0:1 for the 0-470-B,
G & M Engines and 8.6: I for the 0-470-U. The cylinders have down-
directed exhaust outlets. All models with the exception ofO-470-A,
E & J, have rotation provided for the exhaust valves by the use of
rotators. The crankshaft is equipped with pendulum-type torsional
damper weights. The engines have removable-type hydraulic
tappets. Tappets, pushrod ends and rocker arm bearings are lubri-
cated by the engine main oil pressure system.
The engines are furnished with a direct cranking starter and a belt-
driven generator or alternator. The exhaust systems are not
supplied with the engines. The engine main fuel filter, engine
cntrols, vacuum pump and propeller governor are furnished by the
aircraft manufacturer.
The relatively high power delivered by the engines, per pound of
weight, is achieved by utilization of carefully selected high strength
materials, by improvements in design calculated to make the most
of these high quality materials, and by very close control of critical
dimensions, surface finishes, heat treatment and hardening
processes. Careful work has produced more rugged engines than
could be built by less exacting methods; however, no amount of
ruggedness built into an engine will enable it to withstand serious
mistreatment. Overheating, neglect and inferior fuels and lubricants
will seriously affect engine performance, particularly when the
specific power rating is high and each part must be free to function
properly in order to withstand the imposed loads with minimum
wear. These considerations are mentioned here in order to empha-
size the necessity of using only the manufacturer's recommended
gasoline and oil and of keeping the fuel, oil and air filters clean. The
octane rating of engine fuel should be as specified under detailed
specifications in Section II.
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