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The "obvious" way would be using pneumatic cylinders in steam engines, but they would be probably way too large and out of colour. The air supply would also not be trivial, hoses would look and work awfully, and integrated compressors would take up a lot of space in addition to the usually installed electrical components. This could be eased by building a ...


The first thing that came up in my mind when reading your question is: operate switches on your track using pneumatics. You'll require a lot of hose, and would need to experiment a bit with how long the tubes can be without losing too much pressure, but the actuators could operate the switch handles easily, and you can route the hoses under buildings or even ...

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