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| Robinson Hot Air Engine. |
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| Stilldrillin:
Thanks for your replies, Chaps! :thumbup: I wondered if it was some sort of tuning bias. Rather than another builder's bodge...... ::) The pot is in sound condition. I will be able to turn a new top/ shaft location, to repair nicely. Probably..... :D David D |
| madjackghengis:
Well David, it looks really good so far, and like you should have it running up to snuff shortly. I'm really looking forward to seeing that video of it running, and maybe doing something useful, like pulling the cat's tail or some other good domestic job. :lol: :beer: cheers, mad jack |
| Stilldrillin:
--- Quote from: Stilldrillin on February 09, 2011, 04:17:43 AM --- The pot is in sound condition. I will be able to turn a new top/ shaft location, to repair nicely. Probably..... :D David D --- End quote --- Ah! Well........ They were prophetic words! ::) As you now know, everything stopped with a bang. :bang: ...... Well, more of a clatter from the machine, and a whimper from me....... :bang: :bang: So, I sulked for a while. Thought about making my own design..... :scratch: No!...... I want to keep it standard. So, I'll just buy another pot, and work from there. But not really in my comfort zone..... I contacted Polly Models via email, explaining I needed a displacer pot/ cup. The reply was, "A replacement displacer is £18.00 inc vat plus postage of £3.00"....... Hmmm..... Ok, then...... This is what arrived! Which I would call a hot cap........ Twice the thickness of brass, (.045", rather than .022"). 'Orribly big, dead space radius. Wouldn't fit in place of my hot cap....... So, I contacted Poll Models, and was told this best fitted my description of a displacer pot/ cup!! :bugeye: ....... Hmmm..... Didn't like to argue with a lady. So, I asked for an exchange for the displacer, as named on the invoice...... This arrived...... After I had paid to return the hot cap, and after I had paid another £3 for their postage to me...... Looks ok.... Dunnit! Only, it's twice the original material thickness, and larger diameter......... ::) The working clearance is/ would be .020"! And obviously, I can't bore out my hot cap to match! £27, for a displacer pot, I can't use! :bang: :bang: :bang: So, I put it away....... And went and did a few other things, for a couple of months! Normal fumblings will be resumed in a few weeks. Probably! :thumbup: David D |
| sbwhart:
That's a bummer Dave :( How about bushing the bore to get a fit :scratch: . Stew |
| HS93:
is the old one beyond repair? I know it looks bad but woith a bit of taping hear and there I have seen worse. :dremel: Peter |
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