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Senior Member
Re: How to prevent cracked muffler on 912uls
Dustin - your question touched on the irony of the planned flight. That day, Monday, showed hopes of being a relative calm day aloft and was the reason for the planned flight. I had previously made two flights in hopes of obtaining decent data but the turbulence makes the data suspect. None-the-less, I've started an analysis and, as soon as a head cold clears, I'll see if any part of what I have is useful.
Jim - Your idea has merit but one detail of what a close look into the muffler reveals gives me pause. I'll try to get a better picture the next time I'm at the airport but it appears the exhaust pipe/stinger is (or was) an extension of an internal pipe that runs the length of the muffler. This pipe contains numerous holes the exhaust gases have to pass thru on their way to freedom. If that is the case, four breaks were extremely clean and normal to the center line of the pipe.
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