N15class Posted September 8, 2014 Share Posted September 8, 2014 Right now for the stupid question. I am scratch build a loco from a general arrangment drawing scaled to 1-43.5. The detail under the cab is not very clear. There is a brake cylinder mounted horizonally. Now did vacuum cylinders get mounted horizontally or is it the steam brake cylinder? Thanks in advance Link to post Share on other sites More sharing options...
RMweb Premium Blandford1969 Posted September 8, 2014 RMweb Premium Share Posted September 8, 2014 I don't know of any engine with either a vacuum or steam brake cylinder mounted horizontally, what engine are you building? Link to post Share on other sites More sharing options...
N15class Posted September 8, 2014 Author Share Posted September 8, 2014 I don't know of any engine with either a vacuum or steam brake cylinder mounted horizontally, what engine are you building? It is an EX LSWR 0395 class. If you look at the picture of the drawing of underside part of the cab you will see there is a cylinder mounted horizontally. Link to post Share on other sites More sharing options...
RMweb Premium Blandford1969 Posted September 10, 2014 RMweb Premium Share Posted September 10, 2014 It certainly does look like its fitted horizontally, although its hard to see. Very unusual Link to post Share on other sites More sharing options...
buffalo Posted September 10, 2014 Share Posted September 10, 2014 Whilst I know nothing about LSWR practice, horizontally mounted steam cylinders are known elsewhere. For example, GWR Dean Goods, Midland 1532 class (early Johnson 1P 0-4-4T, later versions had vertical cylinders). Off hand, I can't think of an example of a horizontal vacuum cylinder. Steam cylinders are typically much smaller than vacuum cylinders. At a rough guess from memory, the above examples are no more than about one foot outside diameter. Nick Link to post Share on other sites More sharing options...
N15class Posted September 10, 2014 Author Share Posted September 10, 2014 I have come to the conclusion that it is the steam cylinder and when they fitted the vacuum brake they used a combination brake valve. Using the existing steam brake on the loco and tender, and the vacuum for the train. But I am still interested in what they actually did. Link to post Share on other sites More sharing options...
Shed Driver Posted September 11, 2014 Share Posted September 11, 2014 I believe that what you are looking at on the drawing is a section through the drag box. The draw bar is in the bottom of the rectangular centre with the draw bar pin at the left hand end. Norman Link to post Share on other sites More sharing options...
Castle Posted September 11, 2014 Share Posted September 11, 2014 Hi All, Some industrial steam locos have horizontally mounted steam brake cylinders too. Vacuum cylinders rely on being mounted vertically to work properly! I hope this helps! All the best, Castle Link to post Share on other sites More sharing options...
N15class Posted September 11, 2014 Author Share Posted September 11, 2014 Hi All, Some industrial steam locos have horizontally mounted steam brake cylinders too. Vacuum cylinders rely on being mounted vertically to work properly! I hope this helps! All the best, Castle It does help thank you I thought that was the case, but you never know 100%. I am sure they did not alter the brakes when fitting the vacuum system, I am sure they just used a combination brake valve. Link to post Share on other sites More sharing options...
Castle Posted September 11, 2014 Share Posted September 11, 2014 Hi Peter, It depends upon the loco as to what system was used. I can only really speak from my GWR experience of course but there were some shunting only engines fitted with just a steam brake. Smaller locomotives tended to be (although not always) fitted with a combination brake - steam on the loco and vacuum for the train. The mid size and larger locos were vacuum braked throughout. All the best, Castle Link to post Share on other sites More sharing options...
N15class Posted September 11, 2014 Author Share Posted September 11, 2014 It is a ex LSWR 0395 class which is about the same size as the old LMS 2F. I have made the parts now on the assumption that it had a combination brake valve. If some one can prove I am wrong I will redo it. This was assumed because it was built with steam brakes, and retro fitted vacuum. LSWR like SR never liked spending lots of money unless it was powered by electricity, and even then they did not overspend. Link to post Share on other sites More sharing options...
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