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| The Rainbows Engine....... |
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| krv3000:
well this will be brill once its all dun :thumbup: |
| Stilldrillin:
Thanks for your confidence in me, Bob! :thumbup: I had a good think, about making a new hot cap/ displacer, with the largest possible diameter. The 24mm dia locating recess is the limiting factor. Trepanned through the square flange. Piece of 1" dia tube. It's bore cleaned up at 22.5mm......... Set up central to the mounting holes pcd....... And bored to 24mm, plus a bit........ Friction turned a 1.5mm thick, end plug. The machining heat glued it to the delrin. Handy for deburring........ Flux and silver solder....... Penetrated nicely........ Cleaned up nicely......... T'other end. No small dia solder in stock......... Nicely filled, and penetrated........ Cleaned up ok. Spigot to 24mm...... That should make an improvement....... Steel displacer, next. Thanks for looking in..... :thumbup: David D |
| Stilldrillin:
Next job. The displacer I found a piece of thin wall steel tube. (Handle from a Vileda mop), 21.5mm o/d. Perfectly matching the hot cap bore of 22.5mm. Silver soldered the hot end. Same as hot cap, previously. Turned a top hat bush, with 6mm spigot, for M3 thread. Also, a groove, for solder...... Formed solder ring. Fluxed. Then closed together........ With no vent hole, the solder burped a couple of times as it melted. Worked ok though....... Cleaned up. Drilled/ tapped, then fitted the displacer shaft. Comparison to original components....... I adjusted the displacer to give 1mm clearance, at either end of stroke. Then literally, just screwed the parts together. For test purposes. And, tested.......... It's a (noisy) runner! Oh HAPPY DAY!!! :ddb: :ddb: Several of the sloppy linkages need bushing/ shimming. A couple of shafts need replacing, and a new wooden base. But, overall I'm pleased with progress. :thumbup: Thanks for looking in! David D |
| krv3000:
see i sed it wood turn out ok well dun you :clap: |
| Stilldrillin:
--- Quote from: krv3000 on March 09, 2014, 06:57:06 PM ---see i sed it wood turn out ok well dun you :clap: --- End quote --- Thanks for your confidence in me, Bob! :beer: Now, we've got a runner. Just need to make it into a tidy, quiet runner. :smart: One that is appealing to steamtoy enthusiasts........ :thumbup: David D |
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