Good day to all,
A good friend and fellow machinist, David, has just completed the first ( to my knowledge ) one of a Steam Engine No.4 from my free plans. He states it runs very smooth and quite slow on about 2 pounds of air pressure. He plans to leave it in the natural metal finish and will install the center crankshaft support soon.
Looks like he has done a really nice job and some beautiful machine work.
Have a great day,
Thomas