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| Jan Ridders' Simple LTD Stirling Engine - craynerd build log |
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| Stilldrillin:
Chris. I'd forgotten, you'd not actually made this one run! Well done Pete, for the tweaking! :clap: :clap: It runs at the right sort of rpm too! I like to see the wheels go around....... :thumbup: David D |
| Swarfing:
Chris just realised why it took so long to get it working? You were too close to the kettle :lol: |
| Brass_Machine:
Awesome job guys. It looks like a smooth runner. --- Quote from: craynerd on February 24, 2012, 07:29:09 PM ---... As presumed at the time, the test tube glass power piston was not true enough and this has been lapped. The pillars holding the main crank shaft have also been aligned. ... --- End quote --- So the cylinder was lapped? How was this done? Eric |
| raynerd:
Eric, not sure, I`ve been waiting for Pete to reply...I`m sure he`ll pop up in the next few days. The lapping has worked really well it seems and has certainly taken down a few high spots and you can see this where the glass has lightly clouded due to rubbing. I`m not sure how he did it though. Chris |
| Pete.:
Hey guys - sorry I had missed this, probably just because of pressures of work. I found that the test tube that the cylinder was cut from rather than being round was actually slightly four-lobed, and this was causing havoc with the piston-cylinder fit. I found a marker pen with a strong parallel body which tapered to the end and wrapped some emery paper around then sat for a good while watching the TV and gently sanding the inside with this makeshift tool to round the cylinder ID off. Also tried some autobody cutting paste which turned to be too coarse and caused the paper to bind badly so persevered with the emery and finished it off with fine wet & dry with soapy water to improve the inside surface and reduce the friction. I kept this up until the graphite piston would slowly sink in the tube when stood end-up on my desk but drop freely if I lifted it. |
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