800 bOO z ONE PLUG TWO PLUGS Q. m 400 In iTONATI ON 1 » z a. • a 200 y/y2i / IGNITION IGNITION EFFECT OF SPARK ADVANCE ANDNUMBER OF PLUGS ON PRESSURESIN CYLINDER OF ONE-CYLINDER.LIBERTY AIRPLANE ENGINE —5 IN BORE . 7 IN. STROKE1IOO R.P.M. … 10 12 1.4SPARK ADVANCE (INCHES BEFORE TOP CENTER) Fig. 1 .8 1.0 0 .2 4 .6STROKE IN INCHES Fig. 2 > .8 1.0 0 .2 4 STROKE IN INCHES Fig. 3 Curves showing effect of spark advance and number of sparks on maximum pressure, detonation and poweroutput of a single-cylinder Liberty engine This method is…
Automobiles · Aeronautics
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