><ami@mcfadyean.freeserve.co.uk>
>
>That being so, the 'shaking and banging' is likely caused by the low
>frequency primary resonance (torsional and/or blade-flap) that is inevitably
>present below normal cranking speeds. In the absence of any damping, the
>forces produced by resonance will build-up towards infinity.
I have always believed that the shaking and banging on start up was due to
the fact that at low cranking speeds the ignition timing is too advanced,
hence the regular kick backs. The rough stopping may well be due to high
compression/ small flywheel effect.
just a thought or two
Graham
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