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Post by Deleted on May 18, 2014 22:53:00 GMT
---------- carefully !!
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jma1009
Elder Statesman
Posts: 5,919
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Post by jma1009 on May 18, 2014 23:45:13 GMT
thanks alan!
i used for the first time on the above joint some stuff of a bulk buy i obtained from CupAlloys of their cadmium silver solder '842' 2mm dia rods to BS EN 1044. range is stated to be 610-620 degrees C. having recently used johnson matthey easyflo 2 strip on the R-H firebox stays, i was disappointed that the '842' stuff didnt seem to flow anything like easyflo 2, and initially melted on the copper but didnt flow and had to use a stellite rod to move the molten mass about. it seems to require a larger joint gap than easyflo 2. i havent used my stellite rod for years on silver soldering. i also didnt think it flowed as well as silverflo 55 (non cadmium).
the rod waves about a bit and isnt as easy to handle as silver solder strip and the less flexible silverflo 55 rod. i really ought to cut it in half and fix it into a rod of larger dia steel for further use on boiler work.
none of the above is a problem but might be of interest to anyone else who bought this grade off CupAlloys before the cadmium ban end of 2011.
cheers,
julian
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jma1009
Elder Statesman
Posts: 5,919
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Post by jma1009 on May 19, 2014 17:04:09 GMT
a couple of pics of the completed inner firebox assembly after silver soldering in position the inner firebox doorplate yesterday afternoon. the boiler was placed in the same position and set up as doing the side stays ie 'bottom up' and the firehole ring and most of the inside of the firebox filled with thermalite pieces. the inside was also fluxed up at the back. 2 easyflo2 rings of silver solder rod were placed around the phos bronze screw heads - these can be seen in the second pic on what is the top of the rear flange of the inner firebox doorplate. the whole lot was then heated up from outside with the flame being directed at the inner firebox doorplate. you do tend to get a bit of a tendancy for the silver solder to flow by gravity but this isnt too much of a problem and helps get a nice fillet around the curved joints lots more phos bronze bushes to make next and the rear section of the foundation ring. the backhead still fits perfectly im pleased to say! cheers, julian   |
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Post by Roger on May 19, 2014 17:44:03 GMT
That looks superb Julian.
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Post by Deleted on May 19, 2014 18:43:57 GMT
top stuff Julian....if I could afford it I'd be quite happy to pay you to build Doncaster's boiler with the peace of mind knowing that it would be well built and more than up to the task.
Cheers
Pete
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Post by Deleted on May 19, 2014 19:29:13 GMT
"if I could afford it I'd be quite happy to pay you to build Doncaster's boiler with the peace of mind knowing that it would be well built and more than up to the task.".............Blimey, for a moment there I thought you had access to some private telegrammes from Nigel to George, back in the day !!!..............Woah-there chaps, only joshing !!  |
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Geoff
Hi-poster
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Post by Geoff on May 20, 2014 7:25:55 GMT
Looking good Jullian. Without wishing to blow cadmium fumes up your proverbial, I do believe that your sequence is preferable to the others I have seen. The backplate going on last seems to give you more 'time' to do the backhead. The TSMEE method of putting the tubes in last is altogether too scary for me.
Geoff
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jma1009
Elder Statesman
Posts: 5,919
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Post by jma1009 on May 20, 2014 22:50:23 GMT
not all my 'drawings' are as clear as this, but shows how i work - using the inside of cereal packets to sketch things out. this is left the wet header assembly thanks to all your help on here awhile back to use the best 'modern' arrangement. below right is a sketch of the boiler and smokebox to check clearances with same. the sketches are only some 4" wide in pencil. i was rather interested to note that in the current edition of ME harold hall showed a similar arrangement for EMMA VICTORIA but 1. missed out the 'O' ring seal, and 2. specified thick gauge 3/8" dia tube for the regulator steam pipe which is no longer obtainable! parts already made and await silver soldering with high melting point silverflo 24 to the smokebox tubeplate (plus the flange other end for the backhead). all made out of PB1. cheers, julian  |
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Post by ejparrott on May 21, 2014 12:06:42 GMT
I don't like that Emma Victoria thing at all....
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Post by gingerneer on May 21, 2014 14:34:09 GMT
Hi Julian
I am enjoying the description and photos of the build. Its got me wanting to finish the boiler for Ayesha.
Thanks
Will
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jma1009
Elder Statesman
Posts: 5,919
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Post by jma1009 on May 21, 2014 21:42:08 GMT
hi will,
glad the stuff on STEPNEY is found to be enjoyable. i would dearly love to build a 5"g version of AYESHA though might end up doing a super duper 3.5"g MAISEE again as an LBSCR H2 Atlantic, this time much closer to scale with piston valves and a different more prototypical version of the valve gear. no point me doing a 2.5"g version as neither my own club or any other local clubs have a 2.5"g track.
ive finished making the wet header and bush it will get bolted to as per the above sketch. had a very annoying few hours this evening when my last remaining No.43 drill for 6BA tapping size broke in the hard drawn phos bronze bush. i eventually managed to drift it out from the other end by carefully drilling the otherside of what was supposed to be a blind tapped hole. luckily i got it spot on. there was a point when i nearly gave up and thought i'd have to make a new part.
hard drawn phos bronze is awful stuff unless the drills are dead sharp plus not worn on the flutes. where possible i prefer to have blind tapped holes in things such as inner dome bushes and the front and rear regulator flanges.
thanks also to everyone else for your kind comments.
cheers,
julian
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smallbrother
Elder Statesman
Errors aplenty, progress slow, but progress nonetheless!
Posts: 2,269
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Post by smallbrother on May 22, 2014 8:53:58 GMT
To think all this workmanship eventually gets hidden away!
Pete.
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Post by Deleted on May 22, 2014 10:40:18 GMT
True !!-------- but at least YOU know it's there and via this forum so do WE as well.....ps, where's your "Summer report" for the garden railway then, Pete ??
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smallbrother
Elder Statesman
Errors aplenty, progress slow, but progress nonetheless!
Posts: 2,269
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Post by smallbrother on May 22, 2014 15:41:13 GMT
True !!-------- but at least YOU know it's there and via this forum so do WE as well.....ps, where's your "Summer report" for the garden railway then, Pete ?? Hopefully not too far away! Pete. |
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jma1009
Elder Statesman
Posts: 5,919
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Post by jma1009 on May 22, 2014 21:43:12 GMT
popped up to the club this evening, and progress so far on the boiler inspected by our club boiler inspector and the secretary and all passed ok for the final stages.
hopefully might get the smokebox tubeplate silver soldered in position this weekend.
cheers,
julian
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Post by Deleted on May 22, 2014 23:52:57 GMT
Who inspects a Boiler Inspector's boiler ??-------How long before the EU set up an Inspectorate Assessment Department to annually test the Boiler Inspectors for their continual knowledge and Compliance with current regulations etc ??..It's for your own safety, Sir..
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Post by ejparrott on May 23, 2014 9:13:46 GMT
Another boiler inspector. That's why all clubs should have more than 2. We have 4...well.... 3 1/2 in reality. It's also possible to have another clubs inspector do it by prior consent, its all in the green book.
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Post by Deleted on May 23, 2014 9:19:58 GMT
What's the Min. No of people that constitutes a "Club" ??
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uuu
Elder Statesman
your message here...
Posts: 2,860
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Post by uuu on May 23, 2014 9:42:38 GMT
It wouldn't really work with less than three. You need the boiler owner, the inspector and a witness. If they were all "inspectors", they could stand in a small circle and do each others all at the same time.
Wilf
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jma1009
Elder Statesman
Posts: 5,919
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Post by jma1009 on May 24, 2014 23:06:57 GMT
i am a little bit behind schedule this weekend despite the appalling weather as decided to fit the regulator body as a trial fit to the boiler to check it and the regulator steam pipe etc lined up with the holes for the bushes ive made in the smokebox tubeplate and backhead. i find regulator bodies fixed to the boiler barrel very fiddly and havent done one this way for quite a few years but luckily all went ok.
the smokebox tubeplate has also had a trial fit inside the front end of the barrel for the first time since the inner firebox and tubes were fitted inside. as ive used the smokebox end of the barrel to lift up the boiler with tongs to place in pickle after the various silver soldering operations it required a bit of getting true again where the tongs had gripped.
cheers,
julian
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