Sylvain VAN DER WALDE wrote:
"Rob Morley" wrotet...
Chris Bacon wrote:
Sylvain VAN DER WALDE wrote:
[ engine tuning/ compression ratio ]
Comments: The length of the stroke is controlled by the combined
design of the cranckshaft and connecting rod.

Why the *combined* design of the crackshaft and the contorting rod?
Surely just the throw of the crank?

The crank can be offset from the bore, in which case the length of the
con rod makes a difference.

I mentioned that in my answer to Chris, but then decided that it might not
be relevent, and deleted that entry. I believe that the reason for this
offset is to reduce the pressure on the thrust "face" of the piston, and
thereby reduce wear.

That's certainly an interesting idea - do you happen to know
which engines this is used in?