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| puddleduck engine build |
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| mzt:
Now You tell me what and where, I can see it. Thank You. Now what? "Parts for future projects" box and start over with a new piece, or some press fitting plugs into them holes & redrill ? (admitting it would be possible) Marcello |
| ParCan:
I'll just make another 1 I'm planning a Foundary doofah thingy wotsit so I can remelt all my brass scrap. |
| ParCan:
Not had quite as much time lately. Things have moved on again. valve blocks are ready to be reamed to 6 mm. just working out exactly how I go about that. Trying to re centre the hole in the lathe is not going to be easy. Drilling it on my cheepo wickes drill is garunteed to go wrong as well. The lathe is the best bet, I'll drop it in a 4 jaw, I have a height gague, and center the hole. The 1st valves are no good. I have tooling marks in them and the 4mm bit is a taper from 3.98 <--> 4.35 mm. That'll never seal. 2nd attempt at the valves is going much better. I'm using Mild steel this time. Started with 8mm Rod and used a center to hold it steady. Hogged off to 5 mm for the 4 mm dia bit then slowly to 4.05 mm. Used a fine file to take it to 4 mm, then a Pollish with solvo. The 6mm bits are hogged to 6.5 mm for now. I'll take the center bit out, do the drilling then turn the last bit to 6.0 mm and pollish with Solvo. More pictures next time...... Alex. |
| ParCan:
A good few hoiurs in the workshop later... Steam Valves are complete and work. Just need to attach the Packing glands. Remade another spool (that's the 7th started so I'm quite good at those now) Made the M2.5 Studs from a welding rod. Made the steam valve end plates. The Piston block is now assembled and complete. Made the eccentric straps (rather badly I have to say) I'll have another go at those. Remade the eccentrics in Ally - Nylon was just not going to work....... Stripped the crank and put the oil holes in the bearing blocks. Also did the cutout for the eccentric on the Base Plate. I noticed some play in the chuck whilst cutting up my sash weight so ended up stripping down the Lathe Headstock. The bearings are in very good condition all things considered. (It's an ML7 made in 1954) A Bit of blue greasy gunk showed the top shell was lose but the bottom was sitting really nicely. I re shimmed the blocks until there was a tiny bit of friction then added a fag paper. There is no play and the spindle runs freely. I'd also note that Oil Consuption has dropped dramatically :). I may get some more time to play tomorrow. Alex. |
| Brass_Machine:
Hi Alex... Looks like you are making some good progress on the engine. One of these days I will get off my rump and make one. You get some good machining experience out of it. Eric |
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