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Date: Sat, 26 Aug 2006 17:29:09 -0700
From:  <tonyslongez@cox.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Exhaust systems
Cc: Charlie England <ceengland@bellsouth.net>
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---- Charlie England <ceengland@bellsouth.net> wrote: 
> tonyslongez@cox.net wrote:
> 
> >Hello 
> >
> >fellow rotary fliers I don't usually reply to this group as I've been tied up with the "other e-mail group" but all that aside, I have an idea that I would like to run by you guys as I hear this group is a little more open to ideas than the "other group". I've been reading about these heat issues, I think this might be an answere. Mcmaster Carr has this  part#   8498K35 they have several different types of castable ceramics that have all sorts of properties -200  + 7000 deg F and this stuff is really strong, it cures room temp after 16 -24hrs depending on the type you buy. So what I'm prposing won't necessarily keep your exhaust from cracking do to improper fabrication, maybe we could cast a box around the exhaust to keep the radiant heat out of our cowlings. Maybe??? 
> >
> >Tony
> >
> 
> Interesting idea; is it strong enough to just cast a manifold? What 
> would it weigh relative to the cast iron stock manifold?
> 
> 
Charlie
Not sure I think the weight  would be determind by the casting technique.
I'm thinking a hollow box inside a slightly larger hollow box with equal distance all around. I'm at work right now so I can't draw a 3D for you but I will do that when I get home tonight. I think it will work great and we can customize it to fit almost any exhaust.

Tony