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Thanks for the feedback, all pretty interesting. Had a thought myself, one issue seems likely to be the size of silencer required to achieve comparable dB levels to a 2 - 2system. My thinking is that the gases have to pass through twice as fast i.e, giving half the time to do the silencing bit. If you need double the size of silencer then maybe the weight saving potential ain't so great. Another issue might be the restriction created, maybe larger internal dia? but then reducing the gas to baffle contact, meaning more length again?
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Bitza
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