As a practice before making the 4 cylinder, 4 stroke engine for the mini caterham, I have decided to make some simpler engines.
The first engine I have chosen to make the Boll Aero 18. It’s a 1.8cc diesel engine with a 1/2 bore and 0.550″ stroke. I intend to make this as a practice for making cylinder liners, pistons and shafts and achieving the correct fits / tolerance.
If you would also like to make this engine the drawings are available here: http://modelenginenews.org/plans/BollAero18.pdf