This engine is designed to be a simple machining project for the aspiring model engineer. It is designed to not use castings or brazing and used bar-stock for all the parts. The piston, con-rod and big end bearing are machined in one piece for simple assembly and only a 3-jaw chuck is required on the lathe.
1 - Base Plate
2 - Main Axle
3 - Bearing
4 - Crank
5 - Crank Pin
6 - Frame
7 - Cylinder
8 - End Cap
9 - Piston
10 - Pivot
11 - Pivot Nut
12 - Flywheel
Also : Bolts 6x 10 BA or similar
2x M4 countersunk screws
1x M4 grub screw
The menu below details the manufacture of each component in the order they were made.
A PDF file of the engine plans
Plans for a suitable simple boiler
Plans for a model boat
Since publishing these plans, lots of people have sent in pictures of their engines based on this design. Click to view the gallery.
All images shown with owner's permission.
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