Sylvain VAN DER WALDE wrote:
"Chris Bacon" wrote...
Sylvain VAN DER WALDE wrote:
"Chris Bacon" wrote...
Dave Plowman wrote:
The stroke of the piston and the size of the combustion chamber
determine the compression ratio.
[CPB disagreed]
Chris.
You're making a fool of yourself. Just listen to Dave Plowman (and
others).

Above is what DP says determines the CR. Do you *really* agree, or
can you add something to that statement to make it right?

Hmm! Let's try.

As the piston rises to T.D.C. (top dead centre), that fuel/air mixture
will be compressed to an extent determined by the stroke/bore ratio of
that particular engine and the capacity of the combustion chamber.

You're sort of getting there, in that you've added the bore as well as
the stroke, which was missing from the quote I included above.

In message , Chris Bacon
writes
Sylvain VAN DER WALDE wrote:
"Chris Bacon" wrote...
Sylvain VAN DER WALDE wrote:
"Chris Bacon" wrote...
Dave Plowman wrote:
The stroke of the piston and the size of the combustion chamber
determine the compression ratio.
[CPB disagreed]
Chris.
You're making a fool of yourself. Just listen to Dave Plowman (and
others).

Above is what DP says determines the CR. Do you *really* agree, or
can you add something to that statement to make it right?

Hmm! Let's try.
As the piston rises to T.D.C. (top dead centre), that fuel/air
mixture
will be compressed to an extent determined by the stroke/bore ratio of
that particular engine and the capacity of the combustion chamber.

You're sort of getting there, in that you've added the bore

I rather think that was your contribution


--
geoff

In article ,
Chris Bacon wrote:
As the piston rises to T.D.C. (top dead centre), that fuel/air mixture
will be compressed to an extent determined by the stroke/bore ratio of
that particular engine and the capacity of the combustion chamber.

You're sort of getting there, in that you've added the bore as well as
the stroke, which was missing from the quote I included above.

I just didn't think it necessary to give chapter and verse - I assumed
since the only way a combustion chamber can me measured is by volume, and
a ratio must be between like measurements, stroke of the *piston* would be
understood to be the volume moved by it.
However, what would this group be without pedants - including me. ;-)

--
*A journey of a thousand sites begins with a single click *

Dave Plowman London SW
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