Stuart Major Beam Steam Engine running at 10 RPM
Here is an outstanding example of a Stuart Major Beam Steam Engine running on air at just 10 RPM and powered only by a single small aquarium air pump. This engine was constructed in 1997 by John McDivitt who machined and fitted every piece of it right down to the last bolt, stud, and nut. I am very fortunate to have this fine piece in my collection.