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| Gold Blend. A Coffee Jar Engine........ |
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| NickG:
David, I found this link useful, thought you might like to see it. Ihad to read it a few times but think I get it! http://www.stirlingengines.org.uk/modeng/note.html Cheers, Nick |
| Stilldrillin:
Thanks for your replies Chaps! :thumbup: Arnold. The displacer feels surprisingly light, for it's size. About the same as Boggy's Robinson replacement. I thought about hollowing the centre, making rings. But, wasn't sure what the heat might do to any glue used. I think unglued solid discs might be best.... For now. Nick. Thanks for your usual enthusiasm! I have a piece of brass tube, which should clean up at 17.5mm bore. Piston will be brass too, probably. I am hoping it will run on a small, single wick meths burner. If it runs on only a tealight, I'll be delighted! I have a Contax LTD engine..... Running this past 14 months, behind my computer. That is my inspiration...... Thanks for the link. Read some time ago...... Always good for a refresher! Managed a little progress today. Attached the disc to the 4mm shaft, using a 3mm countersink screw, and my faithful high temp sleeve lock....... Turned the o/d to bore size........ Drops in, so far.......... A gentle push, gets it to the bottom....... This then locates the top deck. Holding it level, and concentric with the displacer shaft....... I think 4 off, 3mm screws through the side, into the deck will locate. Allowing future dismantling and accurate re assembly. After an hour or so in the oven, to dry out any remaining moisture, I will reduce the displacer to .1" clearance. I'm expecting no progress during the next few days..... A little Crawling Person will be demanding Grandad's attention! :D David D |
| NickG:
David, this is the sort of stuff I've found myself really interested in over the last 5 years or so! People at the club give me funny looks, little sniggers etc as it's heavily loco orientated - I can only assume they haven't built / understood these magical machines! The LTD I used to have was the same one - they are so well made and would be a good thing to give a few hints on design features. Ah, I thought you were using the pepper pot for that. The 17.5mm tube may be better. The other thing I've heard of people using is K&S brass tube, which apparently is pretty accurate internally. The only thing I'm slightly worried about is the heavy displacer rod / disc at bottom, but if the intention is a spirit burner, it may not matter. Looking forward to progress after weekend - am off camping in Northumberland so will check when / if I return!! Cheers Nick |
| Stilldrillin:
Hope you have a great weekend Nick! :thumbup: Used to spend a lot of time in, above, and underneath the Yorkshire Dales. Just the memory of those times, starts the arthritis nagging, these days. Herself says the engine should have a name, like most of my others....... :poke: "Gold Blend", she says! ::) Guess I need to make the rest of the parts, in brass....... :) David D |
| stirling lad:
Good grief, your not hanging about with this one. great design, great progress, sods law must be on holiday. I hope you manage to get loads more done before it gets back ... with a little surprise for you. :thumbup: keep up the good work, I might try to copy your design one day... after i find the instructions for my screwdriver set.. Doh! ...Mike... |
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