[Fot] Crank Scrapers and Cam Lubrication

[Steven Preiss]

Kind of sheds new light on the impetus behind the development of the Wankel
engine!
Steve P.

----- Original Message ----- 
From: "Bill Babcock" <BillB at bnj.com>
To: <rikrock at aol.com>; <John.Reed at wilson.com>; <fot at autox.team.net>
Sent: Saturday, November 17, 2007 9:36 AM
Subject: Re: [Fot] Crank Scrapers and Cam Lubrication


> I've seen a video of the inside of a crankcase in a running 4 cylinder
motor.
> Oil splash to the cylinder walls is not an issue. Remember that the full
> volume of air is changing under the pistons at 100 times per second at 6K
RPM.
> Two liters of air swapping all over the place at 100 times per second. The
> crankshaft is dragging a cyclone of oil and air around behind it. We
visualize
> it as something running at 60 RPM, oil spinning lightly off the crankshaft
as
> it slowly turns. It doesn't look anything like that.  It's not a gentle
gust,
> it's a vicious tornado. Crank scrapers are diverting the tornado from the
> crankshaft. Windage trays are keeping it from jumping back out of the
sump.
> Much more dynamic than one would naturally visualize.
>
>
> -----Original Message-----
> From: fot-bounces+billb=bnj.com at autox.team.net on behalf of
rikrock at aol.com
> Sent: Fri 11/16/2007 12:56 PM
> To: John.Reed at wilson.com; fot at autox.team.net
> Subject: Re: [Fot] Crank Scrapers and Cam Lubrication
>
> So, you guys are saying that there is no downside to using a crank scraper
in
> a wet-liner motor? That even with connecting rods that don't have the
little
> oil hole like the stock rods do, enough oil gets?to the cylinder walls??
And
> that enough oil gets everywhere it needs to get, all the time?
>
> Rich Rock
>
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