Another bearing question....

[Brian Young]

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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> >
> >
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> 
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=====
Brian Young
Tulsa
b4598070 at yahoo.com
918-745-6046h
918-838-0900w

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