JonL
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Post by JonL on Mar 25, 2019 21:52:47 GMT
Just been going through this thread. Very interesting, I await your experiences of cladding with interest!
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Midland
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Post by Midland on Mar 26, 2019 9:05:54 GMT
Just been going through this thread. Very interesting, I await your experiences of cladding with interest! Nobby, So do I!!!!! D
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Midland
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Post by Midland on Mar 26, 2019 19:58:48 GMT
Dear All (and I need you!) I find the the best thing to do is to sit and look at one of these projects as a couple of hours contemplation reveals! A minor issue but why did the left hand side forward steps lean back? After a while the penny dropped, the builder had put them too far back and they were in the wrong place. Minor but fixable, but a clue perhaps to other issues??!! But the real qustion is the drain cocks. The Clarkson drawings are pretty scant in detail and do not show drain cocks but we know that locos need them. Do I put them on is the question, I think yes and small automatic ones as there are lots of examples. Just a bit nervous about driling by hand into the cylinders but why not, still young enough to hold the drill steady, just have to be careful not to break a drill, nice and sharp I presume (and of cours none of this metric stuff!! Anyone any views??? Also need to try to clan her up a bit but definately not dismantling the chassis as it works!!! IMG_1338 by David Goyder, on Flickr IMG_1339 by David Goyder, on Flickr Cheers David
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JonL
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WWSME (Wiltshire)
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Post by JonL on Mar 26, 2019 21:32:04 GMT
I keep putting off making mine.
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Post by ettingtonliam on Mar 26, 2019 22:23:55 GMT
If you are going to drill into the cylinders, have the drill horizontal and put grease in the flutes, same with the tap. That should minimise any chance of swarf getting into the cylinder.
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Post by coniston on Mar 26, 2019 22:50:29 GMT
With slide valve cylinders there is less of a need for drain cocks as the hydraulic effect will tend to lift the valves, you will get a shower of water up the chimney but shouldn't damage anything if starting from cold very gently. I know Clarkson was very scant with detail, I have his drawings for his 5 inch A3 to help in rebuilding my own example. Without the castings to hand it would be impossible to make it just from the drawings!!
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Midland
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Post by Midland on Mar 27, 2019 20:04:51 GMT
Dear Coniston Indecisive, slide valves have a lot to say but look at those bits on the botton of the cylinders, just inviting a little automatic. Sleep on that one, maybe a scotch and water might help!! D
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jma1009
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Post by jma1009 on Mar 27, 2019 20:55:51 GMT
Hi David,
I would myself fit cylinder drain cocks. Hydraulic lock when starting without cylinder drain cocks is not very pleasant, nor is a shower of dirty water up the chimney.
The operating linkeage will be a challenge.
I would certainly not even attempt to drill and tap the cylinder castings for drain cocks by hand. Needs the cylinders removed and set up on a pillar drill or mill - so quite a huge major job for you to undertake dismantling the whole chassis and motion.
Alternatively, leave as is, and stand well clear when moving back and forth in the steaming bay warming up the cylinders and with a towel over the loco.
Cheers,
Julian
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Midland
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Post by Midland on Mar 28, 2019 9:12:48 GMT
Hi Julian Yes good points! They would be automtic if I did them but a towel at hand seems a simpler solution. Still building wife's new potting shed so have lots of time to ponder!!! D
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Midland
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Post by Midland on May 5, 2019 12:12:39 GMT
Finally done all the patios, potting shed etc and back on the job. Will be great having Terrier101 working alongside to keep me out of trouble, he is a lot better than I am!!!!!! D
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Midland
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Post by Midland on May 5, 2019 21:41:42 GMT
This is going to get interesting as we have two Princess Royal threads running, this one and Terrier101's on his rejuvenating his new build. We will have to let people know when to jump back and forth. Made the automatic drain cocks today and a number of people have asked about them, so first of all the words and diagram. Auto drain cocks 1 by David Goyder, on Flickr and, Auto drain cocks 2 by David Goyder, on Flickr Now these are not too pretty but the one finished one does work, it is the lowest in the picture. The rest need the small disk with the outlet made and soldered in. A bit like watchmaking for a big handed clot like me. Now to see how to fit them. Ed has already mentioned the psoition of the cylinder cover bolt! IMG_1478 by David Goyder, on Flickr and the special fixture mentioned in para 2. IMG_1476 by David Goyder, on Flickr Cheers David
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Post by terrier060 on May 6, 2019 8:27:22 GMT
David - just make sure the inside cocks clear the bogie. They don't on mine which is why I have designed the multi-cock valve. The exits from the cylinders have to be angled towards the centre of the cylinder block.
I have a lot of pictures of Princess Elizabeth I took many years ago when she was it Bulmers Cider Works in Hereford. You are welcome to any of those. May save you a journey. The backhead ones are pretty poor - they were taken in the days of film, and the flash must have failed.
Ed
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Midland
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Post by Midland on May 6, 2019 19:04:24 GMT
Ed, Thanks I am starting to use this thread as less of a "what a good boy I am" to a list of what I have to do and to test some of my ideas. I will have a proper list soon but so far, Cylinder drain cocks, becoming a maybe. Clean her up Straighten guard irons Pipework to clear the rear truck Rear truck dropable for ashpan cleaning Restore boiler to chassis and lag. Now ed look at these pics, they seem to show enough clearance. They show bogie straight, left and right. IMG_1480 by David Goyder, on Flickr IMG_1481 by David Goyder, on Flickr IMG_1482 by David Goyder, on Flickr My worry as you pointed out is the position of the cylinder head cover screws. The drawing shows them allowing a gap but one of my Cldrs is clear, the other is blocked. Will have to look at that more closely before I start drilling into them! Cheesr David
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Post by terrier060 on May 8, 2019 8:45:53 GMT
Yes I am beginning to think Jackson never intended fitting drain cocks, and I am still in two minds because of the cover screw errors. Maybe for now I will forget them, and do as Julian suggests and run up and down with a towel over the chimney! As you state there are more important things to consider.
I just had a thought. What if we made an extension to the exhaust (pointing downwards) with a simple valve on it, so that we could open it at the start of a run and blow the excess water out during the first few beats and it would stop it all being thrown out of the chimney? Worth thinking about do you think?
OR! Just put relief valves on the cylinder covers (they can be used to hold the cylinder cover plates on). Ed
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Post by terrier060 on May 8, 2019 12:30:39 GMT
Hi Dave - Jackson does not show details of the cab - only on the GA and boiler drawing. I was going to draw the cab in CAD and then cut them out on the Tormach. Do you have any full-size drawings? I could just as well cut out two sets as one.
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stevep
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Post by stevep on May 8, 2019 13:25:44 GMT
David,
When I built my Rob Roy, Martin Evans offered drain cocks as an extra, and being a novice, I didn't fit them.
I try to do two things when I have raised steam.
First, I open the regulator gently with the valve gear in mid-gear. This seems to warm the cylinders.
Then I put the engine in reverse, and gently open the regulator. The engine throws water out of the chimney, but because the engine is then going backwards, most of the water misses the engine.
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Midland
Elder Statesman
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Post by Midland on May 9, 2019 8:05:35 GMT
The drain cocks need more thought so I have gone to the other end to repipe the crudities of this one and make the pony truck easy to drop. Rather a tortuous path for the pipes in side the frames but once clipped on they will disappear. And am reducing the size of the pipes. If one scaled the existing up the pipes would be ten inch diamter buggers!!!! Such was model engineering 70 years ago. D
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Post by terrier060 on May 10, 2019 8:43:19 GMT
I like the way your oil is distributed. Nice and simple. I think my boiler must sit lower in the frames because there is not enough room to get an oiling can between. I think I shall have to cut slots in the top of the frames and run pipes under the footplate to fake lubricators on top.
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Midland
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Post by Midland on May 10, 2019 22:44:47 GMT
Ed There is hope at the end of the tunnel. I have to say this very quietly so no-one hears but there was a dog of a PR at Doncaster, I could not find the owner but will try. The poor thing was a wreck, she needs help. Perhaps we need a society for reformed Princess Royals. Perhaps I should write to her herself, she may see the fun in it. We need to find a few more. What fun, as Pip would say on Great Expections! David
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Post by terrier060 on May 10, 2019 22:50:27 GMT
Did you take any pictures?
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