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Barry Railway J Class




1016600091_BarryClassJ.jpg.c93b8ff734d5cb4f2884657a2d671581.jpgThe J Class. Another fairly early version of this sketch. Interesting to compare the J class 2-4-2T with the G Class 0-4-4T. They both use the standard Barry boiler and cylinders, but the J is a longer and heavier locomotive with considerably more coal and water capacity. Sadly I don't know enough about locomotive design to understand the pros and cons of the 0-4-4 and 2-4-2 wheel arrangements. I need to focus a bit more on the differences between the Sharp, Stewart and Hudswell Clarke versions of the J class, and make sure this isn't some kind of uneasy blend. There's also the problem of dates, since they did have some changes over their lives with the Barry Railway. Its sometimes said that its as easy to get models right as wrong, and presumably the same is said of sketches like mine, but I find it an endless struggle to get a reasonable stab at the details. To say the least its rare to find a set of photographs taken from all angles of a single locomotive on a single date, and even then you'd need dimensioned drawings as well. Also one really needs to become expert on the locomotives of a given railway, and I'm more of a generalist. I'll recommend again the work of the Welsh Railway Research Circle when it comes to studying these locomotives. I was surprised to see more brightwork on the photographs of these than I've sketched for other Barry classes, and I had better go back and check the other passenger types at some stage.



Edited by JimC
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Got the Mountford drawing/sketch in front of me, seems to compare well except perhaps his looks a little lower, but that may be a boiler difference or - more likely - an optical misinterpretation on my side. And yours was done from actual photos, if I understand your approach correctly.





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The page on my web site is broadly accurate about how I produce the sketches and the limitations: https://www.devboats.co.uk/gwdrawings/howidraw.php . Please note that although drawn to scale I don't claim them to be scale drawings (!)  In the case of these Barry absorbed locomotive drawings I use drawings in Rutherford as well as Russell - and they often disagree on minor details - and refer to photographs as well. For the Rhymney the drawings in Welsh Railway Records Volume 1 are proving invaluable, being of much higher quality than weight diagrams, but I still look at photos and weight diagrams as well, especially when considering variations. If I can find GA drawings these are obviously more valuable than weight diagrams, and I seize on them. I can't possibly afford every drawing the NRM possesses though.
The biggest issue is distortions and errors, especially with the weight diagrams. They've survived decades of sometimes indifferent storage, then been scanned for the publications and the publications scanned by me. I draw a grid with the measured dimensions I have, and I can then juggle a scan so that it fits as well as possible. Chimneys and cab roofs often don't! I treat wheel centres and boiler pitch dimensions as being most reliable. Footplate height is rarely listed in weight diagrams, and for some reason seems problematic. I like to think I'm getting better at these drawings, and I hope am getting a feel for how the original draughtsmen and women drew curves and so on.

With this one the cab was a bit problematic, and I think there were variations. I spent a lot of time with a particularly good works photo, and spent some time puzzling out and drawing how an unusual handrail along the tank top was laid out, only to find, by referring to later photos, that it seems to have been soon removed, so I left it off!

Edited by JimC
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