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well well well close your eyes for a few minutes and chuck has another engine well on its way the bessemer is a nice looking engine, a good engine collector friend of mine has a 22 1/2 hp one of these beasts and he runs it on propane.it is a double acting cylinder and runs all day just as smooth as a swiss watch.as far as no coolant in the head or towards the back of the cylinder, the engine should be ok for short runs but it will get hot fast because it is not hit and miss.i run most of my model hit and miss engines all day with no coolant and they are fine.what are you using for rod seals? the snow engine is double acting and it requires a spacial "o" ring for a seal, a regular viton "o" ring will not last very long.any way i hope there is room for me on this build wagon cause i want to tag along.chuck
At this point I'm planning on a 1.25" x 1.75" bore and stroke. The flywheel(s) will be a little under 9" diameter and the cylinder will be made from a piece of DOM tubing, 4" long x 2" diameter.