machines which I have made, am making, or intend to make, and some other stuff. If you find this site interesting, please leave a comment.
I have been busy for the past week or so making a Stirling cycle engine. It is the Coffee Cup engine designed by Jan Ridders. It is powered by the heat from a coffee cup of hot fluid. Or an ice cube sitting on the top plate!
Page one of five of Jan Ridders’ excellent plans.
Most of the components of the coffee cup engine.
Possible alternative flywheel, roughed out, I will see how it appears with a bit more finishing. Looks interesting?
An experiment with engine turning on an aluminium surface, using a “Brownells Engine Turning Kit”, kindly loaned to me by Stuart. The pattern is made with the spring loaded wire brush seen in the picture. I used this on the upper plate of the displacement cylinder.
Lots of tiny fiddly bits.
The piston is made from graphite. An interesting material to turn. Surprisingly tough, accepting a 3mm internal thread. And presumably self lubricating. Machining it produces black, pervasive dust. SWMBO is not impressed, since my CNC lathe sits in our living room. I might get marching orders for the lathe as a result of this one.