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| New project, semi internal combustion atmospheric engine! |
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| Stilldrillin:
I generally buy a couple of metres at a time, from these guys..... http://www.ebay.co.uk/itm/Ceramic-Fire-Stove-Rope-Various-Sizes-/331129534946?pt=UK_HG_FireplacesMantelpieces_RL&var=&hash=item4d18dbb9e2 Not far from me. Though, I do realise, they're a bit far away from John...... :palm: David D |
| John Hill:
Raw materials.. IMGP2123 by MrJohnHill, on Flickr 11tpi thread on the bit of aluminium bar.. IMGP2124 by MrJohnHill, on Flickr Pipe cap screws on nicely.. IMGP2125 by MrJohnHill, on Flickr |
| John Hill:
Turn down the pipe cap.. IMGP2126 by MrJohnHill, on Flickr Part it off and mill a slot to make room for the connecting rod, an aluminium piston with cast iron outer.. IMGP2127 by MrJohnHill, on Flickr I would have liked the pipe cap to have been a little deeper.. :scratch: |
| John Hill:
At last, a chance to use my Keats angle plate! IMGP2129 by MrJohnHill, on Flickr There seems to be a few variations being called Keats angle plates but I think this is the original style, stamped made in Exeter. |
| John Hill:
I thought I might try a welded crankshaft for this project as it will require two crank throws and I need it to be rigid. However I have been warned against warping etc. I thought I would give it a try anyway with a simple single throw crank and trying to reduce/avoid warping by welding only on the ends of the shaft. The bits before welding.. The ends of the crankpin welded.. ... when it cooled the long shaft was still a slide fit. Shaft welded then piece cut out... Although there is no obvious warping this is not 100% satisfactory. The main problem is that I welded in the wrong order. I should have welded the shaft first and the crank pin last. The consequence of doing it the way I did is that the shaft welds are really nothing more than tacks. Alignment will be more difficult if the shaft is to be cut before welding but that can be solved by welding scraps to a plate and milling a series of 'V' supports. I need to think on this a bit.... :coffee: |
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