I have no idea what the heck you guys are talking about but I can show you a
two-stroke model airplane engine with the cylinder parallel to the crank and
it has a slot in the piston for the rod.
The transfer of power to the crank is accomplished by a really neat
wishbone-shaped rod with a spherical bearing at the apex.
It goes in here and comes out there but what it goes through to get there is
fascinating.
Might be a tad small for racing - it's about 5 cc.
Mike Cook
----- Original Message -----
From: Bill Babcock
Sent: Tuesday, June 14, 2005 6:38 PM
To: 'Randall Young'; fot@autox.team.net
Subject: RE: 225hp
I was picturing a pin that slid inside the piston attached directly to the
crank. I'm sure it would make no sense but I figured someone, somewhere
would challenge the notion that there needs to be a connecting rod.
Bill Babcock
Babcock & Jenkins
-----Original Message-----
From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net] On Behalf
Of Randall Young
Sent: Tuesday, June 14, 2005 1:04 PM
To: fot@autox.team.net
Subject: RE: 225hp
> (rod length of zero--maybe not impossible, but hard)
Absolute minimum rod length would be 1/2 the stroke, giving a rod angle of
90 degrees at a crank angle of 90 degrees. Somehow I don't think it would
run very well, something about there being no force left turning the crank
(not to mention no skirts on the piston and the wrist pin down "inside" the
crank throw), but anything less is impossible.
Hmm, now I'm wondering about the frictional losses of the piston against the
cylinder wall when the rod angle is greater than zero. Might be another
reason long rods work better.
Randall
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