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Post by Jim on Dec 22, 2018 0:12:43 GMT
As with Pete, all the very best for Christmas and the New Year and I and I'm certain many others look forward to seeing you Clan's progress towards the big steam up day. I'll see if I can email you a tap and drill chart for taps you're using.
Jim.
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JonL
Elder Statesman
WWSME (Wiltshire)
Posts: 2,907
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Post by JonL on Dec 22, 2018 21:15:14 GMT
And the same to you Geoff
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Post by Geoff (Carlisle) on Mar 8, 2019 16:02:59 GMT
Hi all, Reading Doug Hewson's article in the Model Engineer regarding Brass Angle not being 90 deg, I've been a model engineer since the early 1960s ,and the brass angle has always been the same. I always place a short length of steel in the 'V' and squeezed it in the vice. Imagine using the brass angle between the tender floor and the tender side sheet, well if your side sheet is somewhere between 6" and 7", so at the top it's going to be well out. So either do what Doug does by milling a bit off or my method. Why it's like this I don't know .
Geoff (Carlisle).
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jackrae
Elder Statesman
Posts: 1,333
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Post by jackrae on Mar 8, 2019 19:39:04 GMT
Probably cold drawn through a nicely shaped die then stress relieves itself over time resulting the slight change of shape - or maybe not
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Post by Geoff (Carlisle) on May 8, 2019 16:59:41 GMT
Hi all, does Citric Acid when mixed with water go off as mine has been mixed for a couple of months, thanks in advanced for the reply.
Geoff (Carlisle).
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Post by 92220 on May 8, 2019 18:52:24 GMT
It should still be OK...........otherwise there is a lot of lemonade in Sainsburys and Tesco that is dud!!
Bob.
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jackrae
Elder Statesman
Posts: 1,333
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Post by jackrae on May 8, 2019 20:38:38 GMT
It should still be OK...........otherwise there is a lot of lemonade in Sainsburys and Tesco that is dud!! Bob. That's an interesting point. Would sugar free unflavoured lemonade be any good as a cleaner, assuming a water wash after cleaning. Some of the cheap own brands are probably cheaper than buying citric acid crystals edit : to answer my own question --- 8 hours of immersion in 'full strength' Coop diet lemonade cleaned the 'oxide' film from a strip of phosphor bronze edit 2 : Here's an image
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JonL
Elder Statesman
WWSME (Wiltshire)
Posts: 2,907
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Post by JonL on May 8, 2019 23:02:56 GMT
Sounds like an experiment for someone! Coke has phosphoric acid in large quantities, ideal for rust conversion.
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Post by Jim on May 9, 2019 7:00:57 GMT
I can't see how citric acid could go off if left. What I could see happening is it could gain in strength as some of the water diluting it evaporated.
I mixed up a new batch when the original became quite green with the copper sulphate from frequent cleaning of the boiler parts during building.
Jim
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Post by 92220 on May 9, 2019 8:14:46 GMT
Nobby mentions Coke has phosphoric acid in it. Coke is quite often used to clean coins and it works quickly, so it should be a handy cleaner for our bits and pieces. One point about phosphoric acid, if anyone gets any full strength phosphoric acid, for converting rust it should be diluted 15% acid to 85% water. If you try using it neat, it doesn't work very well at all. The dilution actually makes it's action much much stronger. When I assembled my loco frames, years ago, when I worked for a machine tool company, I sand blasted all the parts, and because it was wintertime and damp, they flash rusted. In about 5 seconds they had a slight yellow tinge. When immersed in the dilute phosphoric acid bath, the rust was converted to ferrous phosphate which acted as a protective layer. This was done before the parts were assembled so that every part was completely treated. Phosphating takes about 20 to 30 minutes immersion. Rinse off with hot water afterwards and allow to dry. The phosphate layer also helps paint adhesion.
Bob.
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Post by Geoff (Carlisle) on May 20, 2019 19:26:28 GMT
Hi all, does anyone know if 15mm ODx 13mm ID copper tube is still manufactured as I require it for my fire tubes as i'm having no luck in obtaining it.
Geoff (Carlisle).
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Post by ilvaporista on May 20, 2019 20:35:09 GMT
Hi all, does anyone know if 15mm ODx 13mm ID copper tube is still manufactured as I require it for my fire tubes as i'm having no luck in obtaining it. Geoff (Carlisle). I don't know about the UK but here we have 15mm copper tube with 1mm wall thickness for domestic water systems. I could not tell you the material spec or tolerance. Edit. Spec is DIN EN 1057. No idea what that is in the UK.
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Post by nick952 on May 20, 2019 21:11:48 GMT
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Post by Geoff (Carlisle) on May 24, 2019 19:02:32 GMT
Hi All, here's Charlie examining the Clan Geoff (Carlisle)
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Post by Jim on May 24, 2019 22:38:59 GMT
Geoff, I've just had an email from Charlie to say the Clan looks great with only a couple of things to do to have it up and running. So best you crack on Geoff because he's watching and waiting.
Jim
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jackrae
Elder Statesman
Posts: 1,333
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Post by jackrae on May 25, 2019 16:57:02 GMT
Rabbit Pie yum yum !!
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mbrown
Elder Statesman
Posts: 1,719
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Post by mbrown on May 25, 2019 18:25:27 GMT
Now if you had been building a Bullied Q1, it would be Charlie examining the Charlie....
Sorry - I'll get me coat!
Malcolm
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Post by Geoff (Carlisle) on Jul 10, 2019 20:18:54 GMT
Hi all, this afternoon I went along to see 70000 Britannia trying to ascertain whether the reversing rod that you see from the front of the cab to the lifting arm actually rotates or is there another shaft inside that one, Do your best.
Geoff (Carlisle).
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Post by Jim on Jul 10, 2019 21:48:39 GMT
Hi Geoff, I think you'll find 'the rod' you can see running from the cab to the running plate is actually a protective tube with the shaft that turns the worm gear on the lifting arm rotating inside it. I'll recheck my works drawings just to be sure.
Jim
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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 Jul 10, 2019 22:42:28 GMT
Hi Geoff/Jim, the shaft that operates the reverser screw is tubular and the rotating tube emerges from the front of the cab through a sort of gland arrangement (draught excluder). It then passes down at a shallow angle through the running board and it is the section of the running board with the cutout in it that is covered by an inverted U shaped cover. So, yes the section immediately in front of the cab is uncovered and can be seen to rotate. Britannias, Clans & 9Fs all had similar arrangements and you can Google photos that show this. Try here for example and here and one more.You may recall that later built 9Fs had a piece of chequer plate fitted over the top of the aforementioned cover, no doubt to reduce the chance of someone slipping off the curved shape when walking along the running board, but I don’t think the other classes ever did. Cheers Don
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