My attempt at building a Jan Ridder Sterling engine.

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Shipdisturber

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I received the plans via email a few weeks ago. So far I have made a few parts but the real beauty in this build is I'm learning how to make tiny parts fit together. I've attached some pictures of the parts but I have one question or concern. The work cylinder is a .157 inch bore the piston is .156 inch is .001 too sloppy for the clearance between the piston and work cylinder?
I've also attached a picture of my machine shop, not the best but it works for me. The lathe is a 1942 South Bend with I'm guessing about a hundred hours total use, let me put it this way you can't feel any wear or see any wear.
 
Base and pedistal.jpg
Big cylinder, bottom, pedistal and work cylinder.jpg
Finished cylinder dirty.jpg
First cut with Milling Machine.jpg
Milling machine converted guide bolt.jpg
Milling machine height adjustment bolt.jpg
Milling machine side view.jpg
My machine shop!.jpg
Milling machine height adjustment bolt.jpg
Raw material and finished work cylinder.jpg
 
Last edited:
I have a question about this little engine. Is it better to have a tighter fit on the work piston with slight interference or occasional drag during movement or a looser fit on the piston with no interference during movement?
 

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