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| Full Roast, Gold Blend....... |
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| Stilldrillin:
Thanks Chaps! :thumbup: Star Wars! You're right Steve. But it is rather more mundane than that. I used the thin, stiff alloy, of a jam jar lid. The non stick coating has wrinkled...... Here's a link to the original build. If you have the time..... http://madmodder.net/index.php?topic=5732.0 David D |
| AussieJimG:
I have a feeling that it will return looking and running better than ever. Can't keep a good engine down. Jim |
| vtsteam:
Oh wow, I missed that thread, David, looks great! :thumbup: :thumbup: :clap: I've also been collecting stainless steel canisters forever with the idea of using them in hot air engines and turbines. My wife keeps wondering why I like going to kitchen stores with her and what all the cups, shakers, thermos bottles and canisters are for...... I have a whole box of them tucked under the bench in the workshop. Of course I also tend to hang onto cans and propane gas cylinders. I easily have enough material for twenty engines.....probably time to stop collecting! David have you tried fused glass foam for a displacer? I bought a carton of it a few years ago from a commercial kitchen supply outfit -- it's used to clean grease off of grill tops. I haven't used it yet for an engine, but hope to. As soon as I get these other, ahem, few projects off my plate.... :doh: |
| Stilldrillin:
Thanks for your kind comments, Chaps! Steve. I cannot find anything about, fused glass foam....... :scratch: Hmmm...... Almost a month gone, already! :bugeye: Not had much workshop time, recently. Just a few minutes, here and there...... I made up a bundle of offcuts, to give a 4" square cube......... And started to turn it into a former, for the new displacer. Messy stuff......... Finished article......... Wrapped tinplate around, and soldered the overlap.......... Two off, 3mm thick end discs. Thinned to 1mm, where possible........ The wooden former, held the disc square to the tube, while I drilled for 6off 1.5mm dia rivets Natural ingredients only, for my engines....... Then rolled the tin over the end cap, and tidied up with a gentle touch on the grinder......... Internal boss for the 4mm threaded displacer shaft....... Held with 2off M2 grubscrews, and hi temp sleevelock........ The assembly spins true, within half a mm. Close enough........ Initial runs, on twin candles were disappointing. The hollow displacer sounds to be grinding/ grating as it slides through it's bush. Not a coffee table engine any more! The new displacer weighs 94grms. The original one weighed 69gms, after toasting. The extra weight caused a hesitation, getting over TDC. So I added 3 extra, 2" x 1/2" x 1/8" weights to the flywheel........ Didn't make any difference! :bang: So, I tried with my temporary meths burner, and it ran happily. Well balanced, even up to blurred revs. :headbang: I feel another stainless steel burner coming on....... :thumbup: David D |
| vtsteam:
Excellent work David!!! :bow: :bow: :bow: :bow: :bow: :bow: :bow: Hmmmm, the foam stuff I was talking about was something I ordered a case of 6 years ago and never did anything with. You're getting me anxious to break that stuff out and build a hot air engine with it. |
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