Question about Twin Cylinder model steam engine

Question about Twin Cylinder model steam engine

I was looking at plans for single cylinder model steam engines running off of a spool valve powering the engine in a double action, and had a potential light bulb moment. If a guy were to make a twin cylinder engine Rather than machining a second eccentric and valve, why not just time the crankshaft so the pistons are 180° of each other and have the supply line after the valve y off and run both cylinders in double action? (double action as in the piston is powered when it extends toward the crank shaft and away from it.) If you were to do this, couldn't you have the same power out of 2 cylinders as 4?

Also has anybody ever used rubber o-rings as piston rings and as seals instead of packing where the con rod slips in and out of the bore?

Submitted June 11, 2017 at 10:10PM by notkoreytaube
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Question about Twin Cylinder model steam engine

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