Question on Bearing change out

[Nat Penton]

Wayne I wonder if the Purvis bearing has the same mfgr as BOCA ? 
Nat
----- Original Message ----- 
From: "Wayne Galligan" <wgalligan at goodsonacura.com>
To: <discussion at nsrca.org>
Sent: Monday, February 21, 2005 1:36 PM
Subject: Re: Question on Bearing change out


>I use the Purvis bearings and leave the rubber seals in them and have had
> good service with that setup.  OS 1.40  has over 130 flights and still
> running strong.
>
> Wayne G.
>
> ----- Original Message ----- 
> From: "Tom Simes" <nsrca at shinymetalass.com>
> To: <discussion at nsrca.org>
> Sent: Monday, February 21, 2005 1:01 PM
> 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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