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| NickG:
I've been to the doctors and diagnosed with :proj: again! :doh: This is annoying as I now have 3 projects on the go - not counting the bigger ones! The other annoying thing is that my projects always start off as a quickie but don't end up that way - this time it was Jan Ridder's fault again! He recently posted his Micro Stirling Engine on his website - I had to see it so asked for the plans, which he was very kind to send to me. The problem is, I just don't like making stuff from other peoples plans blindly! It never seems to suit my materials or processes so I have to change things - but I probably go too far. This time I've tried to combine the best ideas from Jan's and another engine I found on youtube - see below: http://heetgasmodelbouw.ridders.nu/Webpaginas/pagina_stirling_1_euro_10/frameset.htm Mine is going to end up a little larger than these two mainly to make things a bit easier for myself and what I have to hand, it should also give it a slightly better chance of running. I have done the CAD model which took a bit of working out but have not yet done the 2D drawings. Please see attachment for the 3D model. I did calculations to ensure the ratio of swept volumes between displacer piston and power piston are almost the same - this is quite important as it largely governs the temperature difference the engine can run on, of course there are a lot of other factors but I think this engine should work. Need to crack on and produce the drawings over the next few days and get cutting some metal - otherwise I'll have projects coming out of my ears! Nick |
| shoey51:
this will be very interesting to watch :) |
| cidrontmg:
Hi Nick, seems we´re both making Stirlings. Mine will be bigger, yours is really small. I d/loaded your CAD model, the yellow parts are obviously brass, flywheel seems to be aluminium. How about the pistons? Graphite power, I guess, but what´s the displacer made of? And the displacer cylinder? Ball bearings, I assume? In the video, the flywheel seems to be acrylic(?). I might try an LTD Stirling sometime soon, but not quite this small :) In HMEM, there´s an ongoing build of an alpha-type Stirling that refuses to run. I must be daft, but I can´t see why or how it would run... :scratch: Although I know that (some) alpha Stirlings DO run... Looking forward to many pictures, I´m going to watch this both eyes wide open! :wave: |
| sbwhart:
I like that Nick :thumbup: I may have a go at one when you've got the drawing completed. Stew |
| Stilldrillin:
Looking forward to this project Nick. :wave: Good luck! :thumbup: David D |
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