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This engine was designed following a number of requests for a simple machining project. There are many other oscillating steam engine designs, and some are much simpler, using plumping fittings and wire links etc... However because this engine was designed to be a machining project, bar-stock was used for all the parts.
The design had several key features : It used no castings and no brazing. The piston, con-rod and big end bearing were machined in one piece for simple assembly. Only a 3-jaw chuck was required on the lathe. |
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Click to Enlarge
A - Cap nuts. 3x 10 BA or similar B - Bearing nuts. 3x 10 BA or similar |
1 - Base Plate 2 - Main Axle 3 - Frame 4 - Cylinder 5 - Cylinder Cap 6 - Crank 7 - Crank Pin 8 - Main Bearing 9 - Cylinder Pivot 10 - Pivot Nut 11 - Piston Assembly 12 - Flywheel |
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Although simple, this design does assume the builder has access to a small pillar drill, lathe, drill set and some hand tools including files and marking out equipment. However the instructions are quite comprehensive and don't assume the machinist has any prior knowledge. The menu below details the manufacture of each component in the order they were made. |
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Click the image on the left to download a zip file of the engine plans. After the engine was complete a simple boiler and steam boat were made to put it into use. |
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Since publishing these plans several people have sent me pictures of their engines made to this design. Click here to view the engines. All images shown with owner's permission. |
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