Marks, Lionel S. (Lionel Simeon), 1871- · New York [etc.] McGraw-Hill book company, inc. · leaf 191
174 THE AIRPLANE ENGINE open at the beginning of a piston stroke and to close at the end of that stroke. In actual engines it is necessary for the valves to depart from this timing in the interests of high volumetric effi- ciency and capacity. Especially must the exhaust valve open early and the… … FIG. 134. — Valves of Fiat engine. inlet valve is related to the time of closing of the exhaust valve : the exhaust valve usually closes completely shortly after the inlet valve starts to lift. The valve does not start to open until the tappet has moved a distance equal to the tappet clearance. The…
Airplanes -- Motors
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