Model Forum / Radio Controlled / Air Models / May 2004

Just make a tub 14 times stroke volume minimum and a stinger outlet of about
60% exhaust port area
this is no rocket science. Larger volumes work better, if you can accomodate
them. Vulume rule does not include extra muffler sections.
cheers, Pé

What ever container you use should have thicker walls than a soup can
because the thin walls will just allow much of the offending sound to
pass thru much like a drum head. Some of the cigarette lighter butane
cans worked quite well as also some of the thicker aerosol mousse
cans. Bigger the better but too large makes the walls weak and
transparent to the sound. At any rate, unless your system is fairly
tuned it may cause a lot of hp robbing backpressure.

Phil AMA609