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| arnoldb:
Nick, I can't offer you advise, but have been following along closely :) - That is a really small little LTD you're busy designing and building here :bow: :bow: - I really wish you success with it! Kind regards, Arnol |
| scrapman:
This is an interesting build Nick :thumbup: what a tiny little engine :bow:, Ray. |
| madjackghengis:
Hi Nick, good luck with the car, they always do it during the cold season it seems. The balsa wood should turn well if at high speed and with very sharp edges. I've got a book on LTD stirlings, and it suggests the use of styrofoam, and a hot wire to cut it. It focuses on a coffee cup sized engine, and suggests cutting out four holes in the displacer, like one would with a cookie cutter, and filling them with stainless steel wool, as "regeneration material, absorbing the heat of the air as it passes through to the cool end, and the air absorbing the heat right back when it returns through as the displacer moves the air to the hot end. I just thought I'd mention that although it would be a bit difficult with the size of your displacer, it would affect the efficiency of the engine overall. :offtopic: I am truly surprised to think there isn't a key or other positive locating device on such an important part, and sensitive issue in that kind of engine. I know also, I would never take an engine, sitting in my shop, and put it in a car without replacing a timing belt, given their propensity for shedding teeth. That whole thing sounds like a nightmare. On the other hand, I'm really looking forward to your success with your stirling, looking to see a video of it running. :beer: mad jack |
| NickG:
Thanks Arnold & Ray. Thanks for the good luck with the car Madjack, I'm at the end of my tether with those, it's a good job I've had this stirling to take my mind off it. I did think about a regenerator but have never seen them used in an LTD, maybe it just doesn't make enough difference to warrant. I think I might try to lighten my nylon displacer and stick some very thin plastic over the holes. I've been looking at the engine manual today and the whole thing is a nightmare- not helped by such things as power steering pumps and air conditioning compressors - I'm in half a mind to remove them completely, make my own idler pully and tensioner. I'm hopeful for this engine but it is extremely small! NIck |
| DMIOM:
--- Quote from: NickG on December 09, 2010, 11:47:00 AM ---.........I've been looking at the engine manual today and the whole thing is a nightmare- not helped by such things as power steering pumps and air conditioning compressors - I'm in half a mind to remove them completely, make my own idler pully and tensioner. I'm hopeful for this engine but it is extremely small! NIck --- End quote --- going :offtopic: (and deliberately misreading things) if you just caught this thread at this point, I'd be wondering what power density this mini-stirling generated to drive hydraulic pumps and an air compressor! and/or will the project then develop equally tiny pumps and compressors .... Dave :coffee: |
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