I accidentally stumbled upon pneumatic tools and did some research of how their inner workings look like. They are rotary vane motors. And although they seem to be quite hungry and they for sure don't look good as an engine, they might be a neat mechanical energy source for some temporary on-board applications like an engine-independent water/bilge pump or something like that. At least for the more unconventional kind of steam boater (is there even a conventional steam boater).
I already see a workshop full of pneumatic tools being tapped to a vertical fire tube boiler before my eyes.
For technical tips, questions etc. on all subjects except Engines and Boilers.
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