1
Listeroid Engines / Re: re-phase a CS style 2 cylinder engine?
« on: February 04, 2012, 08:43:31 PM »
I think the explanation for the sound of the twin is a bit trickier. On the upright twin the crank throws are offset 180 degrees for balance reasons. Being 4 stroke cycle each cylinder fires once every two revolutions or once every 720 degrees. Thus you will have total of two ignitions every 720 degrees.
Being offset 180 degrees the second cylinder must fire either 180 degrees afterward or 180 + 360 = 540deg afterward depending on which cylinder you consider to be first firing. The other way of seeing it is ignition, pause 540 deg, ignition then pause 180 and repeat. The resulting pp, pp.......... pp, pp, has the same cadence as a single. Only it were two stroke cycle could the power pulses come evenly 360 degrees apart and give us a pup, pup, pup!
Frank
Being offset 180 degrees the second cylinder must fire either 180 degrees afterward or 180 + 360 = 540deg afterward depending on which cylinder you consider to be first firing. The other way of seeing it is ignition, pause 540 deg, ignition then pause 180 and repeat. The resulting pp, pp.......... pp, pp, has the same cadence as a single. Only it were two stroke cycle could the power pulses come evenly 360 degrees apart and give us a pup, pup, pup!
Frank