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Group,
I am attaching several JPEGS of tangential mufflers. The smaller muffler is a variant on the cool tube theme, with the bounce panel added. The Jabaru uses a muffler of this style without the cool tube, and it's very quiet. I think the cool tube is a good idea on the rotary to help control temps. The second set of JPEGS is the original VAM concept. Note that the layout is setup for a 20B since that is what I'll be running. The pic with the text shows where the idea was "got wrong" for the test unit. I believe ED K. did a good job of building it but then they ran it sans tailpipe which skewed the result.
Bill Jepson
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