Open Column With Reverse Engine

Autocad 3d ModelingPerhaps the Open Column WithReverse model is more novel and interesting than practical, although it could power a small boat. It is single-acting and capable of fair speed. It is sensitive in the shaft-valve area, requiring close fits to reduce leakage. Any small model using the flats on the shaft as valving will have a bit of leakage along the shaft. Many small models depend on the close fit of the piston and valve rods to avoid making tiny pack nuts and stuffing boxes.