This one is my favourate muDped- What a rhythm. https://www.youtube.com/watch?v=hJYyJccePh8
Aye, that is a goodun'! What a beautiful monster! With just a wee bit of TLC that one could run forever. When looking closely at the exhaust plume you'll see that each "puff" shoots a small donut vortex straight up into the air which very rapidly flies up several meters. Really a very pleasant sound. They begin to show up with pretty good regularity at about 18 seconds into the video. The exhaust seems to consist of two major areas; the lower smoke cloud which blows with the wind horizontally away from the machine, and the very speedy toroidal vortex which shoots straight up really, really fast for a surprisingly long distance. At about 1 minute and 20 seconds, near the end of the video, the cameraman shows more of the exhaust stream and they're very pretty. It's a shame that they're not made for such durability today. Well, maybe the Lister.
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