Al,
Thanks for that data.  My stock unit minus heat shields weighs about 15#.
Quite a penalty, but soaks up a lot of heat.  Got a ways to go before I have to make a decision on exhaust.

On another note, has anyone contemplated using the two part puttys in areas
like intake manifold construction.  I saw some in HD that claims good for
temps up to 450.  I'm hesitant, but this stuff seems to be a cousin to JB
Weld.

Bryan  -----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Al Gietzen
Sent: Sunday, April 26, 2009 12:49 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Exhaust system wall thickness

Bryan;

Here's a data point for an inconel tangential manifold/muffler, with the
3/8" racing beat steel flange.   For my 20B the weight is 12.5#.  The
comparable weight for 2-rotor would be 7-8 lbs.

Al G

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Bryan Winberry
Sent: Sunday, April 26, 2009 5:49 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Exhaust system wall thickness

Sorry for the previous empty message.
Does anyone have a feel for the difference in weight between the stock
manifold and custom SS or inconel, etc.?

Bryan




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