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How I built a hot air engine almost entirely from junk. I've wanted to build one of these ever since discovering stirling engines in about 2003. Spe...
The "core" of a gamma stirling engine of this design is a large cylinder that holds the displacer, connected to a smaller power cylinder providing the...
Displacer cylinder Two empty steel food cans, at least one with a tapering bottom Displacer An aluminium drink can that fits closely inside the sou...
There are several ways of getting a power cylinder and piston for your stirling. At one end of the spectrum, you can buy graphite pistons and glass c...
The flywheel is a wheel that I think came from a VCR. I used it because the bearing ran smoothly and the wheel looks quite nice as a flywheel :) The...
The displacer is a section cut from an aluminium beer can, with lids taken from other cans glued over the ends to make a flat-ended cylinder. This ma...
To make the displacer cylinder, I cut the bottom off a can with a can opener which removes the entire end of the can. I then cut the bottom two inche...
The conrods are made of coathanger wire. Where a joint is only required to rotate a small amount these are simply 90 degree bends in the wire fit int...
Before building anything I drew a diagram and worked out the necessary dimensions of the engine so that nothing would collide, then dry fit all the pi...
In case the video embed doesn't work, the first run video is here on YouTube.
After the engine had run successfully, I addressed some of the issues that had become apparent. The flywheel support wasn't in quite the right place,...
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