Looks pretty interesting. I
need a small, lightweight muffler for the single rotor project, and have
been thinking of these:
http://www.burnsstainless.com/UltraliteMuffler/ultralitemuffler.html
It sounds like there's either
ceramic, or stainless packing in the Burns muffler though, and no
lifetime warranty.
Rusty (off to do another 30 minute test
for oil leakage)