MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 126
he momentum of theoutgoing exhaust gases leaves a partial vacuum in thecylinder which accelerates the entry of the incomingcharge. Valve TimingVALVE TIMING means timing the valves to open atthe right time and meshing the cam gear. To time the valves on an aero engine: 1. Disconnect the cam shaft… … .inlet 75° LATE fLAo) EXHAUST.OPENS 70° EARLY B.D.C. (lead) fig. 21. Engine Timing Diagram. 3. Turn the camshaft until the push rod is justriding the cam. 4. Mesh the cam gear with the crankshaft gear.An engine is so designed that when the inlet valve is correctly timed on the induction stroke on…
Airplanes
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