Hi Randall,
I did qualify my statement to say that - see below. My assumption that
combustion chambers space was part of the engine capacity appears to be
wrong. It certainly doesn't appear to be part of the swept volume and I
guess that means it isn't part of the the engine displacement.
Dave Kernberger clarified the position in his email. Thanks, Dave. It
looks as though I've had a false impression of what constitutes engine
capacity. I just went and checked the bore and stroke figures on one of my
engines, did the calcs and came up with the published engine capacity.
Sorry Lar, I was wrong - but I bet it made a few people think!
Regards,
Ron
Randall Young wrote:
> I beg to differ. Displacement is exactly that : displacement. How much
> volume the pistons displace in one complete revolution. Combustion
> chamber volume (which normally takes into account the shape of the
> piston top) does not affect displacement, nor does piston shape.
Ron wrote:
> > I don't think this is true - assuming we mean displacement to include
> > combustion chamber space as well. If we mean displacement to only mean
> > that volume displaced by the pistons as they move, then it probably is
> > true.
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