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Hi Phil,
The thickness of my header tubing/pipe was 0.102 (schedule 10 pipe I think)
and has lasted over 500 hours and 10+ years. Half of that time I use a
turbo block which produces a more powerful exhaust pulse (no splitters in
the exhaust port).
Now, I would not try to persuade you away from 321 - clearly you can get
longer life and less weight (but as you know - more $$) with it over the
304.
No experience with a tangential muffler so can offer no advice on it.
Ed
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
http://www.andersonee.com
http://www.dmack.net/mazda/index.html
http://www.flyrotary.com/
http://members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.rotaryaviation.com/Rotorhead%20Truth.htm
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Phil White
Sent: Sunday, December 06, 2009 6:53 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Exhaust Manifold material
Ed Anderson: I recall (if memory can be trusted?) that you are using
304 stainless for your exhaust manifold. I am wanting to make a
tangential muffler for my 20B, and wonder if the following might last a
reasonable time:
1. From the ports; 2" x .150 wall
2. Tangential tube; 4" x .120 wall
3. Exhaust pipe; 2.5" x .120 wall
4. End caps on tangential pipe; .125 plate
5. Center tube (to help swirl, and to reinforce end caps); 3/4" x
.080 wall (wondered if it would be a good or bad idea to run cool air
through this to cool it and the exhaust a bit, or better to leave the
ends closed??)
Are these walls heavy enough to last? Or is using $175 worth of 304
a waste of time and money compared to getting the more expensive 321
stainless? Your opinion is most welcome.
Phil in IL
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