<< > > > > Inner tube 4" of  stamped perforated tube (300mm long 1.2mm thick)
 -
 > > >  filled> with very tightly packed fiberglass. The ends of this tube
are sealed
 > > >  with a
 > > >  > half dome end plate 1.2 to 1.6mm thick.
 > >
 > > > Will the fiberglass packing survive the exhaust heat of a rotary???
 > > > Don

 > > Not likely.

 > Sure it will survive!  For 15, maybe 20 minutes.
 >
 > Hans

How did you get it to go 15 minutes? Stay away from the exhaust when you rev
it up the first time. The melted blobs stick to your skin and melt cheap
socks.

Lava rock several weekends.
Stainless scouring pads, almost a season. (guessing 10 hours of full
throttle).
That is with the muffler a good distance from the engine.

Lynn E. Hanover

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