At 09:50 PM 9/17/2003 -0400, you wrote:

 

----- Original Message -----

From: Mark Steitle

To: Rotary motors in aircraft

Sent: Wednesday, September 17, 2003 9:01 PM

Subject: [FlyRotary] Re: 20B

I followed Ed Anderson's lead and used 304-SS, schedule 40, from R.B. Wagner (www.rbwagner.com).  From what Ed discovered, the added wall thickness is thick  enough to dissipate the heat.  The main pipe is thinner as the worst of the heat has been dissipated by the time it gets down that far downstream.  He has been running his exhaust system for a long time without any problem.  The drawback is that its heavier than thinwall.  My 20B exhaust system weighs 20#.

Mark S.

  WELL, I never claimed it was light, Mark {:>).  In fact, folks have told me that if I had just mounted it to the firewall more securily, I could have used it as my engine mount.  But, you are correct, no problem with the headers after 293+ engine hours on them. I too use smaller 0.065 stainless steel tube after the headers. 

 

Ed Anderson

However... you have to realize that the 20# figure for my exhaust system is INCLUDING the muffler.  Anyone know the weight of a Spin-Tech muffler? 

Mark S.