Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines
Builds, Repairs, Show Your Machines! => Restorations => Topic started by: Steam Technology on August 13, 2019, 09:36:11 pm
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The new inlet has a slightly larger internal diameter, I did not think it would make any difference but it does in fact run on a slightly lower pressure.
Serendipity ;) 8)
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Great to see this running on steam Dave. You must be happy with the resurrection progressing along nicely.
Yes very happy with it.
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Great to see this running on steam Dave. You must be happy with the resurrection progressing along nicely.
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I have changed the steam inlet to an angled one which is much more user friendly
[attachimg=1]
This was the one I intended to use originally but could not find it.
As is always the way, I found it the other day while looking for something entirely different and unrelated. ;) 8)
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Thanks Stoker, I am pleased with it.
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Well, there you go then .... WELL DONE!
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The lack of a suitable size pipe adaptor fitting meant I decided to make one.
[attachimg=1]
The thread in the exhaust port is 3/16 with a thread pitch of 32 tpi. And the pipe fitting is a flare.
[attachimg=2]
And fitted to the engine.
[attachimg=3]
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You've got it running now .... Good Job !!!
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Covers fitted properly and packing in glands.
Steam run.
https://youtu.be/ppGnhF7Ub8o
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Nice work so far 8)
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I just read your Restoration Thread.
Some very nice work on this old Stuart S50.
What kind of lathe/milling machine are you using?
Lathe is a small chinese model, as seen on ebay.
No mill, but lots of files and of course drill press, dremel etc.
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I just read your Restoration Thread.
Some very nice work on this old Stuart S50.
What kind of lathe/milling machine are you using?
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Nothing more done to the engine but another longer run on air.
https://youtu.be/cV9ATx8NAF0
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Thanks for all the encouraging comments. I am enjoying this project immensely.
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Certainly inspiring to see this mish-mash of parts being brought together into an operational engine, and a Stuart 50 has long been a favorite of mine as it is a good scale representation of that which made the world go around during the industrial revolution!
Well done on this resurrection and truly hoping it proves to be as good a runner for you as my S50 is for me!
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Nice to see it back together and running, great that it has the bronze cylinder and valve chest.
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Great to see you have life in it .
Well done on resurrecting the reject parts from here .
Cheers
Dennis
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Coming along nicely. Great fun to watch your resto
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Made the valve rod, valve and nut.
[attachimg=1]
Then on to the eccentric rod. I dismantled the engine so I could get the eccentric off to ensure the profile of the brass retaimer/follower was correct.
[attachimg=2]
I cleaned all parts before reassembly.
Then I turned the rod from 8mm bar which gave me the size at the end needed for the pivot.
Made the pivot block next.
[attachimg=3]
Then a trial fit up to set the lengths and sizes etc.
[attachimg=4]
With everything looking good all covers were fitted.
[attachimg=5]
Then curiosity got the better of me and I gave it a trial run on air. A short, rather poor quality video follows.
https://youtu.be/gsPogZ3Yhaw
I have exhaust3d my current supply of 7BA bolts so there are heaps of air leaks. Also as I have not decided whether to go with o ri gs ,oil grooves or packing, the piston is still a block so there will be blowby.
And I am not wholly comvinced that the timing is right despite the detent for the eccentric lock screw.
Anyhoo it works and there is a lot of fettling, fiddling, and finessing still to do.
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The rear cylinder cover had been modified by a previous owner so I converted it into a front cover and will make a new rear cover.
[attachimg=1]
Dismantled it then fabricated the new parts as required
[attachimg=2]
Then a quick assembly just to check.
[attachimg=3]
Also made the packing gland for thr valve chest while I was at it.
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These are nice engines. I'll be watching carefully, and hope that it all works out well for you.
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Watching with interest this resto.
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I have repaired the cylinder and I have drilled out the sheared off studs
[attachimg=1]
This is an early bronze cylinder and the threaded holes are 3/32bsw which I will be converting to 7BA.
Piston rod & piston have been made
[attachimg=2]
The crosshead pivot was seized with rust & gunk so I dismantled. cleaned & reassembled it.
Then a temporary trial fit to make sure every lined up and turned over smoothly.
[attachimg=3]
There is an alignment issue with the cylinder mounting holes and the base due to these not being from the same engine but I will deal with that at a later date.
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I think I have seen them before .
They look familiar
Cheers
Dennis
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Resurecting an S50 from parts of various engines
[attachimg=1]
There is damage to the cylinder and mods to both covers as well as heap of stuff to fabricate.
[attachimg=2]
Plenty to be going on with then!!