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| Jan Ridders' Simple LTD Stirling Engine - craynerd build log |
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| mklotz:
I had one lady spectator who introduced herself to me and offered to shake hands. I noticed that she had nice warm hands so, playing the evil genius, I set about convincing her that the engine ran on the psychic energy that humans emitted. She looked sceptical so I told her to put her fingers on the (upper) 'hot' plate and, if the engine speed increased, it would prove that she had a good 'aura'. She did, the engine sped up, and her eyes dilated and her mouth dropped open. Last I saw her she was running off to tell her girlfriends all about 'psychic' engines. My wife, standing in the background and watching all this, read me the riot act for falsely raising the hopes of the clueless but she had a hard time being serious about it for all the giggling she was doing. |
| Stilldrillin:
Recent show. Warm handed Spectator........ I wondered if I'd get the engine back! He wandered off with it, to show all his pals...... David D |
| raynerd:
Hi guys, thanks for your replies. Yes, Kvom, I did know they could run on a cold source but only because I`ve seen them doing so on youtube and it makes sense but I wouldn`t have considered it. I guess any temperature difference between the plates will cause it to run. OK, here are some pictures for you. I`m pretty sure that this is all the parts are now complete and I`ll spend tonight polishing them up and then finally sealing the displacer if I have time. Here is the displacer being cut from foam board. It actually cut very nicely on the lathe with a sharp tool, much better and more accurate than using a craft knife. This is the holder for the displacer being formed I next needed to make a similar holder for the flywheel. The plans for the flywheel to be glued to the holder but I wanted to be able to change it from something more aesthetically pleasing, I`m not keen on two CDs stuck together..but again I want to stick to the plans until it runs! To make the flywheel changeable, I wanted to drill 4 holes so that I could attach it with small screws. So onto the milling machine and mounting my new Boxford spindle nose attachment so I can use the Boxford chuck. Only ever cutting gears, believe it or not, I`ve never using it this way around so have only just run into this potential disaster!! It doesn`t fit!!!!! I need a solution for future! Luckily with about 2mm clearance I could just centre spot the hole locations but it certainly wasn`t ideal. Two CDs were glued together and attached to the holder And now all the pieces in the box ready for polishing and assembly! OK, I couldn`t resist a quick mock up..notice this was a temporary single disk on the flywheel, it seems to run very very smooth but then the power piston wasn`t in. It did give me an idea of what it would look like. Hopefully further updates shortly! I will need to leave it at least 18 hours for the sealant to dry and of course that is if I get onto it tonight. Thanks for the comments and interest so far. Chris |
| raynerd:
Oh yea, forgot to mention, I cut a middle section out of another testtube and using the same piston with no modifications it seems excellent!! Much better and doesn`t fall through with a finger on the top! :D Thanks to Kwackers for his suggestion on that one. |
| NickG:
Chris, you're right to try to keep to the drawings with thicknesses, I've not seen one with a thick top plate before so I thought you had made it thicker. Am I right in thinking the bottom of your base isn't flat then? How will it collect the heat, if only the thick edges contact the heat source, or are you planning to run it on top of a cup that it will drop over? Looking good and the new cylinder sounds promising - can't wait to see the result fingers crossed, I think you have a runner! :thumbup: Nice work. Nick |
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