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From: "Todd Bartrim" <bartrim@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] I think I screwed up
Date: Fri, 21 Mar 2008 23:14:59 -0700
Message-ID: <GBEMLCNBNOBEHJMIDGKKEEPDCAAA.bartrim@gmail.com>
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Hi Ernest;
	I'm not certain I understand clearly, but it sounds like you filled in the
end of the runner without the variable insert in place? If so, that's' what
I thought we were supposed to do? At least that's what I did. Did it make a
difference? Don't know? That's the way it's shown on the Bruce Turrentine
rebuild video. If you really feel like you need to remove the JB weld it's
easy to do with a oxy/acetylene torch. Just lightly brush it with the flame,
avoiding any direct flame contact with the surrounding metal and you will
find the JB weld will crumble easily and can be brushed away with no
problem. I've used it to mount my injector bungs to my aluminum intake as it
allows for precise positioning of the injector without any of the slight
warping or distortion that's common with an amateur TIG welder like me, but
when a redesign required repositioning, the torch removed all epoxy without
the slightest hint of excess heat to the thin aluminum injector bung, so I
can't imagine that you would have any trouble with the iron housings.
Todd Bartrim

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
Behalf Of Ernest Christley
Sent: Friday, March 21, 2008 9:46 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] I think I screwed up

I think Chris and I are getting into a battle to see who can destroy the
most rotary parts the fastest.

I mixed up some JB-Weld and aluminum powder to fill in the upper runner
on my side housings.  I'm using the 6-port, which usually caries an
insert in the upper runner.  The insert ends with a flat wall, so the
SOP is to fill it in with some epoxy to form a smooth curve into the
chamber.

Knuckle-head that I am, I just filled in the end of the runner, not the
insert.  I didn't notice until I was checking the profile of the rear
side housing to make sure that it matched the front.  That was AFTER the
JBWeld had set, of course.

The question now is "Will the slightly larger diameter for those two
inches make a noticable difference in the engines performance?"  If the
answer is what I think it is, I have the option of using a front housing
that  has a little more  wear, or dig out the JBWeld and get an insert.
(Does anyone have an extra lying around?

--

http://www.ronpaultimeline.com


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