Rusty,

    I think trying to get a 1.75" pipe swaged out to 2.125" using an exhaust
pipe expander is unlikely. Most of the cheaper exhaust pipe expanders will
only take you out another 1/8"  or so in diameter to meet the next size
pipe.  Two suggestions, you might try search on the web for exhaust pipe
"reducers", "collector cones", etc.  Also you might see if your local
muffler shop might have such a fitting or could use their hydraulic
machinery to make you one..

Ed

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From: "Ernest Christley" <echristley@nc.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, February 16, 2004 1:23 AM
Subject: [FlyRotary] Re: muffler?


> Russell Duffy wrote:
> > I also tried to expand a 1.75" .035" 321 stainless pipe today.  I need
to
> > make it fit the 2-1/8" hole in the exhaust flange, and there's no way
I'm
> > going to be able to do this.  It seems like a lot to stretch a thin wall
> > pipe, and I was doing this as a test to see if it would work.
> > Unfortunately, I just can't generate enough force with the tailpipe
expander
> > to do much with it.  I used an impact wrench, with about 120 psi of
> > pressure, and the most I could stretch it was maybe 1/16".   I assume a
> > custom exhaust shop could do this, but would the 1-3/4" pipe expand
> > successfully to be 2-1/8", or would it split?  I'll either have to have
it
> > stretched, or buy something pre-stretched, or perhaps make a new exhaust
> > flange.
> >
> > Ideas are welcome.
> >
>
>
> You sound like you're running out of new skills to learn.  Try this:
>
> http://www.aardvark.co.nz/pjet/spinning1.shtml
>
>
> --
> http://www.ernest.isa-geek.org/
> "Ignorance is mankinds normal state,
>    alleviated by information and experience."
>                                    Veeduber
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>