Another bearing question....

[Wayne Galligan]

Should be none after bearing replacement.  Of course don't mistake prop flex
for bearing movement.  You don't have to use much pressure to feel it.

Wayne G.

----- Original Message ----- 
From: "Brian Young" <b4598070 at yahoo.com>
To: <discussion at nsrca.org>
Sent: Wednesday, October 22, 2003 4:26 PM
Subject: RE: Another bearing question....


> Ive had the same thing happen with my Webra or Bully
> regarding poor idle to midrange and found the bearing
> to be bad by checking the prop tips; just like Wayne
> mentioned. When the bearing is new I think the prop
> tips hardly move. On my current engine they move about
> 0.030 either way, and I think its new bearing time.
>
> Wayne how much movement in the prop tips are you used
> to seeing when you replace a bearing?
>
>
> --- "White, Chris" <chris at ssd.fsi.com> wrote:
> > My Webra used to load up and die when it had about
> > 10 runs on it.... it is
> > pretty sensitive to rich/vs/lean within a couple of
> > clicks. (Fortunately it
> > is not sensitive to temp/humidity and I hardly have
> > to touch it
> > anymore....knocking on wood here:)) I'll certainly
> > keep that in mind about
> > your experience with the OS.  Seems like Keith Black
> > might have warned me
> > about the problem bearing potential when I asked
> > about my mid-range problem
> > a couple of months ago....
> > Thanks again Wayne...all this info is appreciated.
> > Chris
> >
> > -----Original Message-----
> > From: Wayne Galligan
> > [mailto:wgalligan at goodsonacura.com]
> > Sent: Wednesday, October 22, 2003 4:08 PM
> > To: discussion at nsrca.org
> > Subject: Re: Another bearing question....
> >
> >
> > My OS will do the loading up in the midrange and die
> > thing.  It has happened
> > on the last two bearings thus giving me the warning.
> >  Then of course I could
> > verify the end play at the tips of the prop. Funny
> > thing was I couldn't feel
> > any roughness.  But after a fresh bearing it ran
> > fine.
> >
> > Wayne
> >
> > ----- Original Message ----- 
> > From: "White, Chris" <chris at ssd.fsi.com>
> > To: <discussion at nsrca.org>
> > Sent: Wednesday, October 22, 2003 2:55 PM
> > Subject: RE: Another bearing question....
> >
> >
> > > Thanks Wayne.... The first 2 I would expect, the
> > 3rd is new to me, and the
> > > fourth....well that kind of says why we care....:)
> > > Chris
> > >
> > > -----Original Message-----
> > > From: Wayne Galligan
> > [mailto:wgalligan at goodsonacura.com]
> > > Sent: Wednesday, October 22, 2003 2:47 PM
> > > To: discussion at nsrca.org
> > > Subject: Re: Another bearing question....
> > >
> > >
> > > If you rock the spinner back and forth and it is
> > not smooth or you feel
> > > roughness.....bad bearing.   If you grab the prop
> > by the tips and wiggle
> > it
> > > back and forth and there is end play.... bad
> > bearing.  If you experience
> > > sudden changes in the midrange like loading up and
> > engine quits on spool
> > up
> > > and plug is OK....possible bad bearing.
> > >
> > > Or if you see metal filings coming out the
> > exhaust....... TOO LATE bad
> > > bearing and engine.
> > >
> > > Wayne G.
> > > ----- Original Message ----- 
> > > From: "White, Chris" <chris at ssd.fsi.com>
> > > To: <discussion at nsrca.org>
> > > Sent: Wednesday, October 22, 2003 2:32 PM
> > > Subject: Another bearing question....
> > >
> > >
> > > > Hi!
> > > > I hear of guys getting anywhere from 35 to 400
> > flights on bearings:
> > > >
> > > > What are the first signs of bearing problems.
> > Since starting
> > Intermediate
> > > > practice in July, I have just got into flying
> > the same airplane/engine
> > > > regularly enough to wear on an engine and tell
> > the difference in
> > > > performance.  I have 97 flights on a Zen/Webra
> > 145AAR combination. I use
> > > > Cool Power 15% and after run oil religiously.  I
> > have a  tach which
> > varies
> > > > so much with light emissions that I deem it as
> > unreliable.  So what do
> > you
> > > > look for?
> > > >
> > > >
> > > > Thanks, Chris
> > > >
> > > > -----Original Message-----
> > > > From: gene.maurice at comcast.net
> > [mailto:gene.maurice at comcast.net]
> > > > Sent: Wednesday, October 22, 2003 2:07 PM
> > > > To: discussion at nsrca.org
> > > > Subject: RE: bearing question
> > > >
> > > >
> > > > Try WWW.AFCBEARING.COM. Great prices and so far
> > a good product. They
> > carry
> > > > all of the standard sizes, but some of them have
> > to be shipped from
> > Japan.
> > > I
> > > > am using their sealed SS bearing in my OS 160
> > with the seals and grease
> > > > intact. 120 flights (+-) without a problem. And
> > I am using crank
> > pressure
> > > to
> > > > power a Perry pump. This is after going through
> > 2 sets of carbon steel
> > > > bearings after less than 35 flights each.
> > > >
> > > > --
> > > > Gene Maurice
> > > > AMA 3408 NSRCA 877
> > > > Plano, TX
> > > > gene.maurice at comcast.net
> > > >
> > > > =====================================
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>
> =====
> Brian Young
> Tulsa
> b4598070 at yahoo.com
> 918-745-6046h
> 918-838-0900w
>
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