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Post by fisherman on Dec 7, 2020 11:23:50 GMT
Hi All Being a newbie it is taking a while to get used to this creating messages, anyway here goes I have purchased a boiler for a rob roy which has a stamp of KT.8.8.89. and was wondering if anybody out there knows of this. I realise to run it in public I would need a certificate. I have not yet tested it myself but it looks quite well made.The person who i bought it off said it was from a house clearance and didn't know anything about it. May be somebody out there does. thank you in anticipation, stay safe Alan.
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don9f
Statesman
Les Warnett 9F, Martin Evans “Jinty”, a part built “Austin 7” and now a part built Springbok B1.
Posts: 960
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Post by don9f on Dec 7, 2020 13:10:49 GMT
Hi Alan, this might not help much, but back in the late 1980’s, the boiler “kit” for my 5” 9F was supplied (if I remember correctly) by a Keith Tomlinson....a model boiler maker who lived somewhere near Barnsley. Sadly he’s no longer with us, but yours could be one of his?
If it’s never been tested before and there’s no existing certificate etc. hopefully someone will be able to advise you what might be possible as regards inspection/testing etc. Are you a member of a Model Engineering society or club, as the first thing I would do is talk to the boiler inspector?
Cheers Don
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Post by fisherman on Dec 7, 2020 13:26:22 GMT
Cheers Don Think I'll have to join a club. Thanks Alan
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Post by Cro on Dec 7, 2020 17:11:49 GMT
Hi Alan, this might not help much, but back in the late 1980’s, the boiler “kit” for my 5” 9F was supplied (if I remember correctly) by a Keith Tomlinson....a model boiler maker who lived somewhere near Barnsley. Sadly he’s no longer with us, but yours could be one of his? If it’s never been tested before and there’s no existing certificate etc. hopefully someone will be able to advise you what might be possible as regards inspection/testing etc. Are you a member of a Model Engineering society or club, as the first thing I would do is talk to the boiler inspector? Cheers Don I know Paul Tomlinson very well and he said his old mans boiler numbers started GT. Paul threw all his dads formers in the skip when he passed away as he felt he didn't have a need for them but the one he did keep was the full wooden former for the duchess boiler which makes a beautifully scale shaped boiler. Paul is the chap I originally purchased my 9f chassis from, an excellent engineer which too many projects in the workshop to count! Adam
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Post by John Baguley on Dec 7, 2020 17:12:54 GMT
Hi Allan,
As you don't have any paperwork with the boiler it will have to be treated as a new boiler and will need another two times working pressure hydraulic test. It looks built to a good standard so you shouldn't have any problems.
John
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don9f
Statesman
Les Warnett 9F, Martin Evans “Jinty”, a part built “Austin 7” and now a part built Springbok B1.
Posts: 960
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Post by don9f on Dec 7, 2020 19:22:11 GMT
Hi Alan, this might not help much, but back in the late 1980’s, the boiler “kit” for my 5” 9F was supplied (if I remember correctly) by a Keith Tomlinson....a model boiler maker who lived somewhere near Barnsley. Sadly he’s no longer with us, but yours could be one of his? If it’s never been tested before and there’s no existing certificate etc. hopefully someone will be able to advise you what might be possible as regards inspection/testing etc. Are you a member of a Model Engineering society or club, as the first thing I would do is talk to the boiler inspector? Cheers Don I know Paul Tomlinson very well and he said his old mans boiler numbers started GT. Paul threw all his dads formers in the skip when he passed away as he felt he didn't have a need for them but the one he did keep was the full wooden former for the duchess boiler which makes a beautifully scale shaped boiler. Paul is the chap I originally purchased my 9f chassis from, an excellent engineer which too many projects in the workshop to count! Adam Yes I remember now....it was Geoff, not Keith....so my earlier thoughts about a “KT” boiler were most likely incorrect. Thanks Adam for refreshing my memory! Don
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Post by fisherman on Dec 8, 2020 13:46:45 GMT
Thanks for your help perhaps when I get a bit more time I'll get some photos up when I sort out how! Thanks once again ALAN
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weary
Part of the e-furniture
Posts: 290
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Post by weary on Dec 8, 2020 15:07:54 GMT
Some pics of boiler here, third post down for those interested.
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Post by fisherman on Dec 8, 2020 15:59:21 GMT
Here are photos of my boiler and thanks to Weary for the link.
Alan
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Post by durhambuilder on Dec 8, 2020 18:01:43 GMT
It looks well built with neat soldering but does appear to be missing a pair of stays beneath the fire hole, not the end of the world these could be added and comsol caulked but not ideal.
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Post by ettingtonliam on Dec 8, 2020 19:43:35 GMT
I was wondering myself about the absence of stay heads in the backhead below the firehole, but not being familiar with Rob Roy, I wasn't sure.
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Post by John Baguley on Dec 8, 2020 20:27:33 GMT
Now you mention it, it doesn't have the two stays in the throatplate either. Just checked the drawings.
John
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Post by ettingtonliam on Dec 9, 2020 0:36:36 GMT
So with stays missing from the published design, boiler inspectors won't be happy with it?
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Post by John Baguley on Dec 9, 2020 10:38:30 GMT
Not really as it's not to the published design. There's no reason to doubt that it hasn't had the twice WP test though and it obviously passed that.
I had a look at the 'sister' boiler that was also for sale. That was built by the same chap and that has three stays in the backhead and the throatplate so I wonder why he didn't fit them to Allan's boiler?
Unless you have access to oxy-acetlylene or oxy- propane the easiest way to fit the missing stays is to use 1/8" threaded rivets with brass nuts in the firebox and just seal them with Comsol as suggested by Durhambuilder. That's how I would do it. You could even use Loctite to seal them.
It could be done with ordinary Propane if you are very careful but there would be a danger of remelting other joints and causing even more problems.
John
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Post by runner42 on Dec 9, 2020 21:52:50 GMT
I assume that when the missing stays are introduced that the boiler will need to be subject to a pressure test again, since it is a significant repair. It would be beneficial to see inside the firebox since the Rob Roy boiler is noted for bulging on first steaming at the crown due to inadequate crown stay, assuming that the crown stay was fitted?
Brian
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Post by durhambuilder on Dec 10, 2020 18:11:55 GMT
Like may boilers of the time the Rob Roy boiler was originally designed/drawn with a silver soldered shell and threaded / caulked stays. Adding the caulked stays would therefore be true to design. In the absence of any existing certification the boiler will need a 2x test anyway.
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Post by fisherman on Dec 17, 2020 11:16:38 GMT
Thanks all for your input The drawings I have are the Martin Evans design so I have decided to add the missing stays, 2 on the backhead and also 2 on the throat plate,these will be threaded and nuts added, on peering through the holes with a torch from what I can see the crown stays appear to be silver soldered up OK.
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