On Thu, 30 Nov 1995, Frank van Dalen wrote:
> I think you got it wrong John...
>
> Each piston has combustion once every 4 strokes of 180 degrees, ie once every
> two crankshaft revolutions. If there was a knock from one piston/rod, you
>would
> hear it 500 times per minute at 1000 RPM, ie 500/60 = 8.33 times per second.
> The camshaft goes round at half the speed of the crankshaft, 4.17 a second,
> which is the frequency of the knock in question. Or have I gone mad?
Mad, no, but read your post again - you contradicted yourself.
cam = crank / 2, yes, but crank is 1000, not 500!
=> both rod knock and cam knock are 8 times per sec!
Who knows, maybe I'm mad!?
Ulix
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