A short closer explanation to the Engine
This engine has two oscillating cylinders, and works very similar to the original Penn-Engine. The stroke is 18mm and the bore 12 mm. The engine is reversible, the steam goes in and out the cylinders by the center bolts in the middle, and is distributed in the middle block. The crankshaft can be shortened from 100 mm down to around 90 mm.
Lathe and milling machine is required, clean and exactly work absoluteley necessary!
Best regards from Vienna
Gerhard