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| Robinson Hot Air Engine. |
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| Stilldrillin:
Thanks for your ideas/ suggestions, Jack. :thumbup: But I think I'll leave the displacer thoughts, until this present section's sorted........ ::) Finished roughing, at .005" per pass...... I'm going to face off the 6BA threads, down to below the level of the part thread..... I'll then reduce the dia of the o/d by .1" per side, right through to the neck. Then counterbore the new piece, to replace the o/d, and machine a larger flange..... The original flange is a bit small. Doesn't seal well on the 1/16" cover plate. Making new 3mm plate with recess for flange, to replace...... Unless anyone else has a better idea? :wave: David D |
| shoey51:
david looks good to me just watching on the side lines :thumbup: |
| Reckless_Engineer:
A Top job so far david! This thread may come in handy whilst trying to convince the other half the pile of random metalic objects i have could come in handy one day :clap: |
| Dean W:
Now I get it, David. Wasn't sure I understood when you first started on that piece of CI. Makes sense, and I think it will work as you are hoping. For that displacer, do you mean the can part itself? I would use aluminum for that. Make it as thin walled and light as you are able. Less mass going up and down will do nothing but help the situation. Dean |
| Stilldrillin:
Graham, Tom, thanks! :thumbup: Dean, Isn't aluminium too conductive? Isn't steel better? :scratch: Read somewhere, someone's used balsa wood...... Looking around the still uncleaned casting. The hole for the air tube is quite generous....... Looking on t'other end, not much material left. Err...... Wossat? ...... In't back corner? Gave it a poke and a proddle. Guess this is the source of the leak....... :doh: SIGH......... Again........ Wonder if this is the last of the glitches? ....... Nah.... Doubt it! :bang: :bang: David D |
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