Two Home Made Steam Engines and a Manual Air Compressor.....One Blows Up

I built these six years ago while learning how to use a vertical mill and metal lathe, out of scrap aluminum, steel, and brass in my home workshop. I had no engineering plans for the engines, preferring instead to simply design them as they progressed. They ran upon completion, but have been gathering dust for several years, so this video was a great excuse to dust them off and see if they were still operational. As we will see, there was one casualty due to operation at excessive speed and pressure, but the damage been repaired and the engine is now back in working order.