Canister Muffler Theory
12-09-2003, 03:28 PM
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Canister Muffler Theory
I'm trying to understand how a canister muffler boosts the power from a 2 cycle engine. I have experience with tuned pipes and understand how they work with the reflected pressure wave in concert with the port timing. But, I have been unable to locate any information on just how a canister muffler does its job. I don't have one yet to take apart. But, it appears to be a pipe in a can. I can believe it will reduce sound. Is it boosting power only through less restriction? Are there any volume or length equations for these things?
Any pointers to canister muffler design/theory would be appreciated.
Happy Flying!
Lloyd
Any pointers to canister muffler design/theory would be appreciated.
Happy Flying!
Lloyd
12-09-2003, 04:46 PM
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RE: Canister Muffler Theory
I've searched for this info and nothing is documented. Dick Hanson is likely the best source of info. The ones that boost power have a header that goes almost to the back of the can. This provides a header length around 20-25 inches so the boost is in the range of 6,00-7,000 rpm. By reflecting off the back wall of the can, the overall length of the system is short enough to fit in an airplane. Think of it as a conventional tuned pipe folded back on itself internally.
