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Reciprocating steam piston assembly

You can either tie the pivot at the flywheel to a throttle for rotation speed or tie the piston to a changing counter. I find that rotating the flywheel is easier to rig and manage, though slightly less authentic. Make sure you tie the flywheel pivot and cylinder into the body/hull of your vessel.

Note: In order to make this operate in Advanced Mode, all electric nodes except the pivot OR piston need to be disconnected so that they can spin/cycle freely.