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From: "George Lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2812835@logan.com>
Subject: Re: [FlyRotary] Re: I think I screwed up
Date: Sat, 22 Mar 2008 16:56:51 +1000
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Ernest,
The six port gives staged intake for the higher RPM- what rpm that is I 
don't know. If it's over 7,000 rpm you don't need it - but I have a feeling 
it's something like 5,000 rpm so the extra breathing area would be 
advantageous. It might be a bit lumpy down low, but Lynn would know!
George ( down under)

> 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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