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and now feel a new man!
Hi David,Please to hear you are feeling better Quote from: Stilldrillin on September 29, 2016, 01:22:40 PMand now feel a new man! Sometimes I think that I too would like to feel a new man but so far I have come to the conclusion that machine tools and castings sets are more reliable Jo
David, I don't see how the displacer can operate connected to the crank the way it is. Does the vertical bolt with the acorn nut on top slide up and down in the L shaped block on the crank, if so I would have thought there would be a lot of friction there. I would be trying to loose a good bit of weight on the displacer linkage. Also the displacer rod seems to be on the large side, but as long as the seal at the gland is OK, this should not cause any problem. The ratio between the displacer, and the power piston should be some where about 1.5 : 1, plus or minus a bit, a larger ratio will allow lower temperature. Minimum friction, no leaks, including the hollow displacer., and if it wont start remember that the displacer leads the power piston by 90*.Ian S C
Reversed emery cloth is used for polishing graphite.Fine emery cloth. Correct way around, for brass etc.The steel rule backing, gives much better control, than fingers....
Hi DaveOf course we'll have a runner soon. Alternatives are not an option. Bit heroic doing this today? Too flamin' parky here. Abandoned my shop antics after about 15 mins. and indulged in a bit of radiator cuddling. Dave
Quote from: Stilldrillin on November 06, 2016, 02:52:05 PMReversed emery cloth is used for polishing graphite.Fine emery cloth. Correct way around, for brass etc.The steel rule backing, gives much better control, than fingers....I hold it round a 10" smooth file. Steel rules have a nasty habit of getting a sharp edge from running scribers up and down their edges.I would have said typical Yorkshire man but then realised that you can't be from Yorkshire as you didn't mention about only buying one grade and as it wears out using it instead of wasting money buying the finer grades Jo
Keep on Bodging David
Looks to be a good 'redesign' of this engine I await the first trials
Just wondering, how many ball races have you got on the main bearings, it looks like two on each side. It's often suggested that the shields on the bearings are removed, the grease washed out and replaced with a low viscosity oil, although I'll admit that I leave the bearings intact.Things look as though they are getting back together.Ian S C
A small boring bar if you have one. If not a 2 flute endmill (6 or 8mm) in a suitable holder used as a boring bar. Drills or reamers will follow the existing bore.
, but may not be as efficient as a conventional conrod and bearing, but it's good to try all types of action as it is pleasing to see the different motions of each. Ian S C
I have never really bothered much about hot air engines This well made example is wonderful I may be converted!Regards Terry