[SPAM: 6.389] RE: Question on Bearing change out

[Michael Laggis]

Nat,
I have had mine for 4 years.  I have put hundreds of flights on it as well.
I run a 15in prop on stock exhaust.  The engine is on a highly modified Sig
4 Star 60.  I use the plane for flying in the winter time off of a frozen
lake and in the summer time for just messing around.  The rusty bearings are
my fault.  I took the plane out on the frozen lake with a about 5 inches of
fluffy snow.  The motor I know ingested a good amount of snow and I didn't
take care of the motor before I put the plane up.  $30 worth of bearings is
much better then $200 for a new motor.  

Michael  


-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On
Behalf Of Nat Penton
Sent: Monday, February 21, 2005 12:30 PM
To: discussion at nsrca.org
Subject: Re: Question on Bearing change out

Michael, I have about 700 flts on one 91FX and in excess of 500 on another
with the seals left in place. They are both very smoothe right now, even
after a few weeks sitting on the shelf. I never run under a 15 in prop 
except for the 14.5 in four blade.                Nat
----- Original Message -----
From: "Michael Laggis" <fishgod at pobox.mtaonline.net>
To: <discussion at nsrca.org>
Sent: Monday, February 21, 2005 1:39 PM
Subject: RE: Question on Bearing change out


>I found the shields extremely easy to remove.  They look to be  
>rubber/plastic coated brass.  I took an exacto knife and slid it up 
>into  the  outer race and the shield popped right out.  There was no 
>damage to the  shield or the bearing.  I believe that if I wanted to I 
>could put the  shields back in.
>
> Michael Laggis
>
>
> -----Original Message-----
> From: discussion-request at nsrca.org 
> [mailto:discussion-request at nsrca.org]
> On
> Behalf Of Tom Simes
> Sent: Monday, February 21, 2005 10:02 AM
> To: discussion at nsrca.org
> Subject: Re: Question on Bearing change out
>
> On Mon, 21 Feb 2005 10:28:19 -0800 (PST) Bob Richards 
> <bob at toprudder.com>
> wrote:
>
>> I had heard that the "shields" were really dust covers, and would not 
>> impede the lubrication from getting to the bearings during normal use.
>> IMHO, in the event of a bearing failure, having the shields in place 
>> might prevent parts of the bearing from damaging the rest of the 
>> engine.
>>
>> Having said that, I have never installed shielded bearings, so I 
>> don't have any experience with my theory. Any comments?
>
> I was just going by Boca's documentation which points out that 
> removing the shields on the main bearing increases the flow through 
> that bearing to the rear of the engine where the connecting rod and 
> piston pins live.  Also by example the originals in my engines haven't 
> had shields and further the things take relatively little force to 
> remove once you get a good hold on them.  I would imagine that in a 
> really catastrophic failure the shields are just going to become part 
> of the high speed metal soup anyway.
>
> --
> Tom
>
> _____________________________________________________________________
>
>       |  ,  |               Tom Simes
> ---------(@)---------        AMA 230068
>        --|--                NSRCA 3830
>          '                  nsrca at shinymetalass.com
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Content preview:  Nat, I have had mine for 4 years. I have put hundreds
  of flights on it as well. I run a 15in prop on stock exhaust. The
  engine is on a highly modified Sig 4 Star 60. I use the plane for
  flying in the winter time off of a frozen lake and in the summer time
  for just messing around. The rusty bearings are my fault. I took the
  plane out on the frozen lake with a about 5 inches of fluffy snow. The
  motor I know ingested a good amount of snow and I didn't take care of
  the motor before I put the plane up. $30 worth of bearings is much
  better then $200 for a new motor. [...] 

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 0.1 EXCUSE_3               BODY: Claims you can be removed from the list
-8.0 BAYES_00               BODY: Bayesian spam probability is 0 to 1%
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  25 AC_VIRUS_SCAM          Feeble attempt to make you execute a virus
-7.4 AWL                    AWL: From: address is in the auto white-list