... and you can't forget about those big ol' steam engines. There is nothing
like standing a two feet away from a 6' dia. flywheel spinning at some obscene
rpm... The way they sling oil onto the journal surfaces is so simple yet so
effective. Much like the way Bill described, but on a MUCH grander scale. For
those who are interested in internal combustion engines, I recommend that you
go to a steam engine/tractor show. You'll see some really oddball creations and
you can't miss the "dyno pulls" with 120 year old steam engines running as much
pressure into those cylinders as they possible can.. scary but worth checking
out. There was (is?) a great steam tractor / engine show in Lancaster PA
sometime in August. I haven't been back in a few years, so I can't say wether
they still have it or not. If they still do, for those in the area, it's
certaintly worth checking out.
-Bob
Bill Babcock <BillB@bnj.com> wrote: Centrifugal pumps look exactly like a
diff--a spinning impeller that slings
a liquid to the outside of a case. You don't need much pressure, a pound of
differential would be plenty.
There are millions of engines that use the pumping motion of the crankshaft
to oil the motor--most every lawnmower has one. No oil pump at all other
than the slinger on the crank. I wouldn't try it on a plain bearing engine
with overhead valves, but it works fine on a small sidevalve motor with
roller bearings or a loose bushing.
>From what I understand Kas and Tullius used pumps--doesn't mean they needed
to.
-----Original Message-----
From: SHANE Ingate [mailto:hottr6@hotmail.com]
Sent: Tuesday, April 25, 2006 10:52 AM
To: Bill Babcock; oldskooling@yahoo.com
Cc: fot@autox.team.net
Subject: RE: [FOT] Differential fluid
Hey Bill,
I guess I've never heard of a diff described as a "pump" before.
And seeing that there is no directionality of the "pump" (into/out-of either
of the two short pipe runs), then I still don't see how fluid/heat could
transfer between the diff and the catch can other than by dispersion.
Gee, if that worked, we wouldn't need oil pumps on our motors because the
crank could "pump" oil to heads and bearings.
Besides, didn't Kas and/or Tullius use pumps?
Shane
----Original Message Follows----
From: Bill Babcock
To: 'SHANE Ingate' , oldskooling@yahoo.com
CC: fot@autox.team.net
Subject: RE: [FOT] Differential fluid
Date: Tue, 25 Apr 2006 07:54:49 -0700
It has an inlet and an outlet and there's a short run of pipe so there's not
much friction. There's lots of pumping going on inside any differential at
speed. I'd guess that the connector located near the middle is low pressure
and the one close to the periphery is higher. We don't need no stinkin'
pumps. And anything Prather builds is absolutely certain to be well thought
out and functional.
-----Original Message-----
From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net] On Behalf
Of SHANE Ingate
Sent: Tuesday, April 25, 2006 7:18 AM
To: oldskooling@yahoo.com
Cc: fot@autox.team.net
Subject: Re: [FOT] Differential fluid
>Is this what you're talking about
>http://www.pratherracing.com/products/miatadiff.html
I don't get this; this looks just like a catch can that relies on
serendipity to transfer hot fluid to the can and return cool fluid to the
diff. Unless it is pumped, I cannot see how it could provide any
quantitative effect.
Shane "P.T. Barnam" Ingate in Md
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