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Just curious as to what the most efficient steam engine design is. I know this depends on the usage of the engine, but overall what would be the most efficient? The reason that I ask is because I am interested in possibly building a mid sized steam engine that could act as a PTO for running...

I haven't built any steam engines but am planning on putting together one of the Launch style steam engines like in my post here:http://www.homemodelenginemachinist.com/index.php?topic=8083.0 One of the questions I have is about the piston and cylinder materials. Can they both be brass or...

I found a box of Popular Mechanics magazines from the 50's up to the late 70's in the attic of my mother house when she bought it in 1993. As a mechanically inclined 13 year old, I was thrilled with my find. The one issue that I found that really caught my attention was the Feb 1973 issue. This...