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| Potty Dake Engine |
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| Rob.Wilson:
Interesting build Stew :thumbup: Sitting quietly watching . Rob |
| Stilldrillin:
I'm with Rob...... Mesmerised. :scratch: David D |
| sbwhart:
Thanks Bennie/Rob/Dave A little more done today. I didn't like the look of the bearing housing far too square to look like a casting so set it back up in the lathe, and slew the compound over 5 deg and tapered the back end a bit. That looks better OK back to the front plate turned up the central boss to a tight fit in the exhaust port with the outside 50mm dia so that I can write the words DAKE ENGINE on it, and fixed it in place with some high strength loctite. The plug only goes into the exhoust 5mm, I wanted to fit it first as the long air ways will cut into it. To drill the air way I used a 4mm long series drill. Long series drill along side a standard jobber drill. Clamp to angle plate centre drill and then drill part way with the jobber and finishe to depth with the long series clearing the chips as you go so that it doesn't jamb or break. I also ground one land of the long series drill long so that it would drill big so if it did break i would have a fitting chance of getting it out. The inlet hole only goes as far as the anular port, the exhaust hole crosses the anular port into the exhaust port, to seal it off from the the inlet a thin wall brass tube goes down the hole to bridge the inlet anular port. Stew |
| sbwhart:
Well I'm a bit overwelmed by the interest this is generating. So moving on to the next part the outer cylinder this is ally fabrication and is made the same way as for the inner cylinder. With the square made I I found the centre and drilled the hole for the location dowels so that the end plates could be accuratly located. As I doubted that the holes for the two end plates would be accuratly matched i decided that it would be best to spot the hole postions for the two plates seperatly using a tranfer punch. The fixing screws holes were filled with Milliput epoxy stuff. I then had to make a spacers to take the slipper strip this is instead of the gyb strips that the real engine has fitted. Then make the brass slipper plates. This is how they fit And a quick hows it looking so far shot Stew |
| andyf:
--- Quote from: sbwhart on November 06, 2012, 04:39:45 AM ---Well I'm a bit overwelmed by the interest this is generating. --- End quote --- It's had 850 views so far, Stew, so there's plenty of interest. It's just that our minds are so boggled :bugeye: that we don't know what to say! Andy |
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