DescriptionHeisler locomotive - 2 cylinders in "V" configuration (3153874023).jpg
Here you can see the right side with its single cylinder connected to a central crankshaft - there is a similar cylinder on the other side making this effectively a "V2". This is a Heisler - similar in some aspects to a Shay (optimised for tight curves and steep grades) but a Shay has 3 cylinders on one side rather than one on each side.
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