Jonathan Posted January 8, 2013 Share Posted January 8, 2013 The L&SWR M7s which were used as push pull locomotives were, I believe, those with longer frames? Have acquired a short frame M7 and wish to convert this into a long frame. It appears that the extra length was at the front end. Is this correct and if so, apart from the addition of the push-pull paraphenalia, by how much does the frame need lengthening between the smokebox and the front bufferbeam. If this isn't possible where can I find the numbers of M7s shedded at Exmouth Junction in Southern days which were short frame. I hope this topic is in the correct place - if not, my apologies. Link to post Share on other sites More sharing options...
10800 Posted January 8, 2013 Share Posted January 8, 2013 The long framed M7s were about 1ft 3in longer, and according to Locomotives Illustrated #73 comprised nos. 30051-60, 30125/7/8/9/31, 30328 and 30479-81 (subtract 30000 to get SR nos. of course). There is information on the data page on http://www.semgonline.com/steam/m7class_01.html about push-pull fitting, but this includes short and long and seems mostly to refer to the LSWR wire-and-pulley system. Only the long M7s could accommodate the compressed air pumps for the later push-pull conversions, but I'm not sure if they were all so modified. No doubt the Irwell Book of the M7s will give chapter and verse (but I don't have it). Locomotives Illustrated #73 gives allocations for Exmouth Jn in 1950 as 30024/5/30/34/39/46/49/55, 30105/24/33, 30245/52/53/55/56, 30320/23/74/76/77, 30668/69/71 but not for SR days (again refer to the Irwell book and other sources). HTH Link to post Share on other sites More sharing options...
Jonathan Posted January 8, 2013 Author Share Posted January 8, 2013 The long framed M7s were about 1ft 3in longer, and according to Locomotives Illustrated #73 comprised nos. 30051-60, 30125/7/8/9/31, 30328 and 30479-81 (subtract 30000 to get SR nos. of course). There is information on the data page on http://www.semgonline.com/steam/m7class_01.html about push-pull fitting, but this includes short and long and seems mostly to refer to the LSWR wire-and-pulley system. Only the long M7s could accommodate the compressed air pumps for the later push-pull conversions, but I'm not sure if they were all so modified. No doubt the Irwell Book of the M7s will give chapter and verse (but I don't have it). Locomotives Illustrated #73 gives allocations for Exmouth Jn in 1950 as 30024/5/30/34/39/46/49/55, 30105/24/33, 30245/52/53/55/56, 30320/23/74/76/77, 30668/69/71 but not for SR days (again refer to the Irwell book and other sources). HTH Thank you very much for the information. That provides me with the length of the very small addition I shall need to insert to make the locomotive that little bit longer, as well as other sources for finding out the relevant numbers. Link to post Share on other sites More sharing options...
N15class Posted January 8, 2013 Share Posted January 8, 2013 You will have to watch the M7 had different splasher sand box arangements, with out my books I cant help with which ones had what. No not all where pull push fitted. They hung the aircylinder under the front running plate. Link to post Share on other sites More sharing options...
Butler Henderson Posted January 8, 2013 Share Posted January 8, 2013 It might be simpler to sell the short frame and buy a long frame one, you can get them for as low as £40 on an ebay auction if you are lucky. Link to post Share on other sites More sharing options...
tender Posted January 8, 2013 Share Posted January 8, 2013 Of the long frame M7's , 24,46,49,55, and 105 were allocated to Exmouth shed in Jan 1947 (A Historical Survey of Southern Sheds). Hope this helps Ray. Link to post Share on other sites More sharing options...
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