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| Potty Simpson and Shipton Short Stroke Engine |
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| sbwhart:
Hi Nick Graphite sounds a good idea, I've made a cast iron piston and tried it for fit excetra and its seem a lot better than the PTFE, I've also resculptured the bases, and I'm in the process of putting it all together, but I've got a few domestic Job to do:- muck out and change the straw in the house etc. I don't think I will be going to Harogate this year we've had so much on over the last month that things have been building up also Daughter is due to give birth to second grand child about then and we're on standby to look after grandson. Cheers Stew |
| NickG:
Stew, Cast iron is probably the next best thing, that's what I used for my first flame gulper but now I want to do a graphite piston and valve for that as the next two engines ran so well with it. If you do try the graphite you'll find it very easy to get a good fit & finish, I just left mine in it's turned form to keep it nice and square and it quickly beds in to exact size. It's a bit mucky to machine but is a good lubricant anyway. Ah that's a shame, congratulations, sounds like you'll be even busier soon then!! Nick |
| sbwhart:
Thought I'd better update the build log 1st making the cast iron cylinder. Turning to size after drilling off set hole The trepanning a groove for some packing, seems to work ok without packing tough, still nice to have the option. Shaft assembly using same method as for the PTFE Also pinned the crank journal using soft nails. Then whilst waiting for deliver of new 7" fly wheel made the stop valve, body fabricated in two parts silver soldered together. Get to use the new ER32 indexing blocks to cut an hex for the valve pillars. Worked a treat :thumbup: Completed valve And on the engine Stew |
| Stilldrillin:
That engine and valve, look as though they were made for each other, Stew! :D Well done...... :clap: :clap: :thumbup: David D |
| HS93:
Nice job Stewart , there old panel pins, by the way where did you get the aluminum plate from for the layers of the cake ? :headbang: :ddb: :nrocks: :ddb: Peter :ddb: :nrocks: :ddb: :mmr: |
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