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<DIV><FONT size=2>When I was using .60 engines with tuned pipes, I had to
replace bearings really often. The only time I didn't have bearing problems is
when I used straight castor, however, due to the black exhaust residue, I ruined
so many shirts (mine and my caller's) that I didn't save any money, and it was
getting really difficult to find someone to call for me. Since I've gone back to
the larger (1.40) two strokes I've been using straight castor fuel as an after
run-keep it in a separate tank and run it about a minute and it seems to slow
down the rust. My 4 stroke engines have run for years wit;h no bearing
changes-no after run oil-not run dry. They have non tuned pipes-used only
for quietness, on them which makes me wonder if the exhaust residues
that are forced back into the engine by the tuned pipe are causing the corrosion
or acting as a catalyst when mixing with unburned fuel remaining in the
engine.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Jerry Voth</FONT></DIV>
<DIV><FONT size=2>NSRCA 1073</FONT></DIV>
<DIV>- Original Message ----- </DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=kgamueller@rogers.com href="mailto:kgamueller@rogers.com">Karl G.
Mueller</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, December 06, 2003 9:55
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Fuel/Water,
Bearing/Rust</DIV>
<DIV><BR></DIV>
<BLOCKQUOTE id=0><LABEL id=HbSession SessionId="645129618"></LABEL>
<DIV><FONT size=2>Anybody ever check to see if bearings with brass
cages</FONT></DIV>
<DIV><FONT size=2>will rust sooner than those with steel ones? I don't
use</FONT></DIV>
<DIV><FONT size=2>them because the brass cages with disintegrate before
the</FONT></DIV>
<DIV><FONT size=2>steel ones do.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Karl G. Mueller<BR><A
href="mailto:kgamueller@rogers.com">kgamueller@rogers.com</A><BR></FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=rcaerobob@cox.net href="mailto:rcaerobob@cox.net">Bob
Pastorello</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, December 06, 2003
10:11 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Fuel/Water,
Bearing/Rust</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Good point, Bill.</FONT></DIV>
<DIV><FONT face=Arial size=2> Does anyone KNOW if the
"brass corrosion"/conversion into acetic acid is the REAL deal? How
can we find out?</FONT></DIV>
<DIV><FONT face=Arial size=2> Wouldn't it be bizarre if
the corrosion on bearings issue was due to something like
this?</FONT></DIV>
<DIV><BR>Bob Pastorello, Oklahoma<BR>NSRCA 199, AMA 46373<BR><A
href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</A><BR><A
href="http://www.rcaerobats.net">www.rcaerobats.net</A></DIV>
<DIV> </DIV>
<DIV> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=billglaze@triad.rr.com
href="mailto:billglaze@triad.rr.com">Bill Glaze</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, December 06, 2003
9:48 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Fuel/Water,
Bearing/Rust</DIV>
<DIV><BR></DIV>Bob:<BR>You might want to take a look at the plated
clunks occasionally, I've had the plating break down, (possibly from
vonstant vibratory contact with the bottom of the fuel tank) and then
the brass begins to corrode. Bill Glaze<BR><BR>Bob Pastorello
wrote:<BR>
<BLOCKQUOTE cite=mid003601c3bb37$d6717120$5da26144@oemfu7ig3a7fro
type="cite"><PRE wrap="">Also, most clunks I've seen lately aren't brass-looking. They apparently
are plated and look shiny-brite metal. I've drilled some of them, to find
they're brass underneath. So that sort of begs the question, WHY would fuel
tank manufacturers add the expense of plating a KLUNK ??
My Mintor setup has no brass that I can see; it will be interesting to
see how this goes. Has an MK tank, aluminum tubes, nylon tees in lines.
Plated clunk in the tank.
Bob Pastorello, Oklahoma
NSRCA 199, AMA 46373
<A class=moz-txt-link-abbreviated href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</A>
<A class=moz-txt-link-abbreviated href="http://www.rcaerobats.net">www.rcaerobats.net</A>
----- Original Message -----
From: "Brian Young" <A class=moz-txt-link-rfc2396E href="mailto:b4598070@yahoo.com"><b4598070@yahoo.com></A>
To: <A class=moz-txt-link-rfc2396E href="mailto:discussion@nsrca.org"><discussion@nsrca.org></A>
Sent: Friday, December 05, 2003 7:45 AM
Subject: RE: Fuel/Water, Bearing/Rust
</PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">Cant remember if the fuel needed the water in it to
break down into acetic acid..anyone recall? ;0
I have had older brass clunks corrode the nipple off
at the end of the tubing.....I have noticed the little
green brass particles plugging up the ports on some of
my engines....always wondered why they used the brass
for this stuff. I use plastic or aluminum if I can,
and steel clunk if available.
--- Dwayne & Nancy <A class=moz-txt-link-rfc2396E href="mailto:dwaynenancy@cox.net"><dwaynenancy@cox.net></A> wrote:
</PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">Bob, Joe said that blaming water in the fuel as the
cause of bearing
rust was a "folk tale". The cause was the fuel
decomposing into acetic
acid (vinegar). The decomposition is caused by the
catalytic effect of
the brass components inside the fuel tank. Joe
tried leaving bearings
in several brands of fuel for four months without
any rust forming. You
should read the magazine more carefully. You can't
tell when something
valuable with show up. <VBG> Dwayne
-----Original Message-----
From: <A class=moz-txt-link-abbreviated href="mailto:discussion-request@nsrca.org">discussion-request@nsrca.org</A>
[<A class=moz-txt-link-freetext href="mailto:discussion-request@nsrca.org">mailto:discussion-request@nsrca.org</A>]
On Behalf Of Bob Pastorello
Sent: Thursday, December 04, 2003 8:25 PM
To: <A class=moz-txt-link-abbreviated href="mailto:discussion@nsrca.org">discussion@nsrca.org</A>
Subject: Re: Fuel/Water, Bearing/Rust
Okay - Matt - since my MA already found it's way to
the shredder....
WHAT did he say about rust protection?
Bob Pastorello, Oklahoma
NSRCA 199, AMA 46373
<A class=moz-txt-link-abbreviated href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</A>
<A class=moz-txt-link-abbreviated href="http://www.rcaerobats.net">www.rcaerobats.net</A>
----- Original Message -----
From: <A class=moz-txt-link-abbreviated href="mailto:Rcmaster199@aol.com">Rcmaster199@aol.com</A>
To: <A class=moz-txt-link-abbreviated href="mailto:discussion@nsrca.org">discussion@nsrca.org</A>
Sent: Thursday, December 04, 2003 6:11 PM
Subject: Fuel/Water, Bearing/Rust
The diatribe of the last week or so on this list has
been, shall we say,
rather........ interesting, (except for the news
about Kirk Gray, that's
plain sad). It's time for something new.
In this month's Model Aviation, Joe Wagner talks
about experiments he
has run with a trusty old engine. He ran baseline
performance data with
his regular fuel and then he added water in his fuel
to see how badly
performance would be affected. His results where
very interesting. Shall
we say that he made chopped meat out of that "sacred
cow".
He also briefly touches on what really is the root
cause of bearing
rust. Even the uninitiated should find that
interesting. Could a
solution to all of your OS bearing woes be this
simple?
There, that ought to whet your whistle.
Matt K
</PRE></BLOCKQUOTE><PRE wrap="">__________________________________
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