Rear bearing

[Lem and Christina Stevens]

I am getting about 10,100 rpm on the engine I just cleaned, and it runs very
rough in the mid range.  With the same header and pipe, I get about 10,700
rpm on my other engine.  Both engines are OS 61 Hannos.  I am using an APC
12 x 12 pipe.

Urs, the engine was frozen up with the castor, so that it would not turn.
The carb barrel was also stuck.  It took three day soaking in fuel and then
a heat gun just to free the crankshaft so that it would turn.

Del,  bearing is free now, but definitely can feel some rough spots.  From
your description, it probably should be replaced.  Rough running and lower
rpm.

Lem
----- Original Message ----- 
From: "Urs Baertschiger" <urs3 at hotmail.com>
To: <discussion at nsrca.org>
Sent: Saturday, May 22, 2004 3:38 PM
Subject: Re: Rear bearing


> Since you do not mention what engine you are working on almost anything is
> possible. I'd recommend you fly the engine till it has accumumulated at
> least 1 hour of running time. Then you tell us what problems you have
> encountered if any. Basically I wouldn't expect castor oil to affect
> bearings even if the engine hasn't been used for some years.
>
> Urs
> NSRCA 3069
>
>
>
>
>
> >From: "Lem and Christina Stevens" <landcstevens at comcast.net>
> >Reply-To: discussion at nsrca.org
> >To: <discussion at nsrca.org>
> >Subject: Re: Rear bearing
> >Date: Sat, 22 May 2004 11:45:02 -0500
> >
> >I am interested to learn what the symptoms are for a bad rear bearing.  I
> >have an old engine that I am cleaning up.  It was run on castor oil and
> >then
> >sat since mid 1990s.  I have it running after much work, (I hate castor
> >oil)
> >but I wonder if the bearing is any good.
> >
> >Thanks,  Lem
> >----- Original Message -----
> >From: "Alan Schiaffino" <alan at schiaffino.org>
> >To: <discussion at nsrca.org>
> >Sent: Friday, May 21, 2004 8:12 PM
> >Subject: YS-60
> >
> >
> > > Well looks like I won't be able to make to Temple. Just lost a bearing
> >on
> > > my engine while practicing for tomorrow. Does anybody have any
> >experience
> > > with this engine? Seems I go thru bearings pretty quick (~60 flights).
> > > I've used Omega, CoolPower, PowerMaster 20/20, and always run the
engine
> > > on the rich side.
> > > =====================================
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> > > and follow the instructions.
> > >
> > >
> >
> >
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