BarryH
Active member
Oh for the life of me, wheres the nearest tree I'll go cuddle it. More green crap coming outta Brussles, yes I know its spelt wrong, telling us whats good for us.
In actual fact. Silencing an internal combustion engine to the point where its "quiet" actually uses more fuel so it ain't really that green! Law of physics. Hot gases expand. If they expand violently then theres a sound. Suppressing the sound is restricting the flow of gas. Which in turn reduces the output of said engine. Don't quote road cars at me thats a whole different ball game. So are 2 strokes that require a bit of back pressure to give a better scavanging effect.
Esiest way to make boats quieter is raise the duty on marine diesel. They won't get started as much!
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In actual fact. Silencing an internal combustion engine to the point where its "quiet" actually uses more fuel so it ain't really that green! Law of physics. Hot gases expand. If they expand violently then theres a sound. Suppressing the sound is restricting the flow of gas. Which in turn reduces the output of said engine. Don't quote road cars at me thats a whole different ball game. So are 2 strokes that require a bit of back pressure to give a better scavanging effect.
Esiest way to make boats quieter is raise the duty on marine diesel. They won't get started as much!
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