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‘Johnboy’ Stirling Engine – Part 1
The Finished Engine ‘Johnboy’ is a Stirling Engine designed and built by ‘Aussie’ Jim to run from the heat of a cup of coffee (or any other heat source at about that temperature). This particular...
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‘Johnboy’ Stirling Engine – Part 2
The Crank Disk The outside diameter of the crank disk was next turned from a length of bar in the 4 jaw chuck (again, just because the 4 jaw was in situ). Then the bearing mount was turned leaving the...
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‘Johnboy’ Stirling Engine – Part 3
The Wheel Assembly We can’t use Bogs’ method to hold the wheel on the lathe because it has to have a large hole drilled where the centre would hold it. Instead, it was held on the rotary table together...
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‘Johnboy’ Stirling Engine – Part 4
The Glass Cylinder Liner Now it is time to cut the glass syringe to make the cylinder liner. I used a diamond wheel in an air grinder with the syringe held very gently in the lathe (and with suitable...
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‘Johnboy’ Stirling Engine – part 5
The Flywheel The flywheel is held in the 3 jaw chuck and faced, drilled to depth and bored. This is the smaller diameter bore which is the deep one. I had previously checked that the chuck could fit in...
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‘Johnboy’ Stirling Engine – part 6
The Completed Engine Running Click here to view the embedded video./ And there is the finished (or at least completed) engine. It should now run. And here it is with the chamber sealed up with tape...
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