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| sbwhart:
Well I've sortof made a start whilst I was making the link for the loco I had some long cuts to do so set the trips on the mill and just let it get on with it whilst I did a bit of work on the Dake. The Dale is one of those engine thats best made from the inside out that way you make the part in the sequence they fit together so its just a matter of making each part fit. So starting with the inner cylinder which is made from a 3" dia chunk of EN1A free maching mild steel. Face of to thickness, and drill and ream a 8mm hole down the middle. The turn up a 8mm mandrell a nice close fit on the cylinder, bolt the cylinder to it and skim the outside down to size. Thats it for now, but every engine has to start someware :loco: Stew |
| andyf:
I'll watch with interest and admitation, Stew. You do seem to like a challenge :proj: I might just be able to finish one like this, because it seems to be made from Lego: Andy |
| saw:
I will follow this with great interest :thumbup: :thumbup: |
| Stilldrillin:
You really have to be different, don't you Stew! :bugeye: Good luck with this build...... :thumbup: Following quietly along. David D |
| sbwhart:
--- Quote from: Stilldrillin on October 07, 2012, 05:27:37 PM ---You really have to be different, don't you Stew! :bugeye: David D --- End quote --- My boss always says that:- don't know why :D Bit more done today I was unsure as to the best way to progress on this, not quite sure what I would use the mandrel for but it just seemed a good idea to have one. To mark out mounted the mandrell on the spin indexer used this to centre the height gauge then mounted the piston to it and used the indexer as a marking aid, the marking out is just for a sanity check that everything is going in the correct direction. One of the problems with this engine is trying to get your head round what the important features are, I recon getting the side faces of the piston cymetrical and parallel but the crown of the piston is not so critical So strating on the side faces, set the disc up in the vice Using a parallel to get get it leve Find the top of the disc and zero the vertical slide on this, then mill the required amount off. Flip it over and mill exactly the same amount off the other side. A quick measure showed that they were cymetrical within 0.05mm that will do. Now to do the crown. Set it up square in the vice using a 1*2*3 block this should be good enough. Then mill as for the side. This took all of my shop time for today this is it so far. Stew |
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