Author Topic: Muffler for model i.c. engine  (Read 2296 times)

Offline Zephyrin

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Re: Muffler for model i.c. engine
« Reply #30 on: August 31, 2019, 11:37:52 AM »
I have tested several mufflers on my engines, of the type illustrated above, with perforated tubes or baffles inside, mainly in the aim of reducing the noise, without great success alas...

recent readings suggest that the volume of the expanding chamber has to be at least 5 times the volume of the cylinder to reduce noise efficiently, I have not yet tested a muffler that large, which seems huge and ugly !

Offline Admiral_dk

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  • S°ften - Denmark
Re: Muffler for model i.c. engine
« Reply #31 on: September 01, 2019, 07:55:26 PM »
Quote
If you look back at some of the threads with Grahams Alyn Foundry engines in them you will see similar exhaust pots being used.

OK, so that is just another thing my memory has lost .... I usually read all postings here, but some stay better than others  :headscratch: