Subject: powersport accident
From: ACRE NL
Date: 1/8/2003, 8:00 AM

What wall thickness was the 321 stainless exhaust tubing  Keith?

Paul Lamar

Keith Holm wrote:

16 gauge, or .065".
Keith Holm
Powersport Aviation

Wow! .065 thick 321 and it still broke in only four hours. Hard to believe.
Must have been a defective weld or he cantilevered the entire ridged exhaust 
system off the flange with no braces and it vibrated at a sympathetic
resonant frequency. Either that or that PowerSport PP 13B is one powerful 
motor :)

Tracy got 650 hours out of this .035 thick SS muffler.

Paul Lamar
 
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