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| We'll Call it Metisse........ |
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| vtsteam:
Well, happy birthday David!!! :clap: :beer: And I think you may have something there with a smaller power piston. :smart: |
| Stilldrillin:
Thanks VT! Yesterday, was a good day....... :thumbup: No available shop time, this morning....... But. A quick calculation, gives a displacement ratio of 1.834. Not a lot, in my opinion. :smart: Sleeving the cylinder bore, to give 14mm dia, gives 2.394. Think I'll give it a go. Unless anyone else has any ideas? :scratch: David D |
| vtsteam:
Can you sleeve it with cast iron instead of steel? |
| Stilldrillin:
--- Quote from: vtsteam on August 15, 2013, 05:38:21 PM ---Can you sleeve it with cast iron instead of steel? --- End quote --- I could....... But it seems such a waste, to reduce the only piece of c/i I have, from 30mm down to 16mm dia! :( David D |
| Stilldrillin:
I roughed the cylinder sleeve o/d, to just over, size, minus 2 thou'. Drilled out 13mm. Then bored carefully, until I had a finish I was happy with. Around .540" bore......... Topped the o/d. Until the cylinder would push on. Then, polished it with the Scotchbrite pad........ THAT, was when I noticed the flange was loose on the cylinder! :bang: :bang: Another assault with the digging in tool. Another soldering session. :palm: Soft solder, this time......... Looks ok, I think........ Assembled. Before owt else goes wrong........ Made a piston blank. Plus .010 on the o/d. Made a fixture, with M3 screw thread......... Finish turned the piston blank. Polished the final resistance marks away with Scotchbrite........ And....... Assembled it. Oiled, where necessary. And lit a temporary burner. And waited. For about 20 seconds. And............. Oh.......... HAPPY DAY! :ddb: :ddb: :ddb: That's another little engine, doing what it's supposed to do......... :thumbup: Thanks for watching! David D |
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