Thane of Fife Posted July 19, 2015 Share Posted July 19, 2015 Does anyone know the size of the G7S boiler as fitted to the 4F and 2P classes? I am planning a 4F and wondered if the boiler could be used with other loco classes. Thane of Fife Link to post Share on other sites More sharing options...
bike2steam Posted July 19, 2015 Share Posted July 19, 2015 4F & 2P = 4'8" x 10'5 & 15/16", yep both the same, and the fireboxes. Link to post Share on other sites More sharing options...
RMweb Premium Clive Mortimore Posted July 19, 2015 RMweb Premium Share Posted July 19, 2015 Does anyone know the size of the G7S boiler as fitted to the 4F and 2P classes? I am planning a 4F and wondered if the boiler could be used with other loco classes. Thane of Fife There were 3 class 3 goods with the G7S bolier, railway rumour has it that these 3 locos were better than the 4Fs. The class 3 passenger tank (Flatiron) had the G7S boiler after rebuilding. They are the only other classes fitted with this boiler. The Class 3 goods and a host of various Deeley/Fowler class 2 passenger 4-4-0 rebuilds had the saturated G7 boiler. Dimension wise the G7 was the same as the G7S. A class 2 saturated 4-4-0 would be different, various wheel diameters and wheelbases to choose from. Link to post Share on other sites More sharing options...
Thane of Fife Posted July 20, 2015 Author Share Posted July 20, 2015 Thanks everyone for the replies. I have noticed that the Austin Seven boiler was G7 3/4 S. Does this mean it was the same as the 4F boiler, but lnoger? Thane of Fife Link to post Share on other sites More sharing options...
Poor Old Bruce Posted July 20, 2015 Share Posted July 20, 2015 Thanks everyone for the replies. I have noticed that the Austin Seven boiler was G7 3/4 S. Does this mean it was the same as the 4F boiler, but lnoger? Thane of Fife Not quite. The 7 3/4 was 3 inches bigger in diameter and 4ft longer between tubeplates. Bear in mind that the sizes given by bike2steam above are of the naked boiler. Cladding will add extra diameter. Link to post Share on other sites More sharing options...
bike2steam Posted July 20, 2015 Share Posted July 20, 2015 (edited) Bear in mind that the sizes given by bike2steam above are of the naked boiler. Cladding will add extra diameter. Apologies, yes Chris you're right,I forgot to mention that, so add about 5 - 6" ( 2mm -ish)on the diameter for cladding. Edited July 20, 2015 by bike2steam Link to post Share on other sites More sharing options...
Talltim Posted August 30, 2019 Share Posted August 30, 2019 On 19/07/2015 at 13:55, bike2steam said: 4F & 2P = 4'8" x 10'5 & 15/16", yep both the same, and the fireboxes. I assume that’s 4’8” diameter and 10’5” long. What’s the 15/16”, the thickness of the steel? Also i assume the length is not including firebox? Link to post Share on other sites More sharing options...
Traintresta Posted November 27, 2021 Share Posted November 27, 2021 Does anybody have the dimensions of the G6 and G5 1/2 boilers please? Link to post Share on other sites More sharing options...
Poor Old Bruce Posted November 27, 2021 Share Posted November 27, 2021 On 19/07/2015 at 13:55, bike2steam said: 4F & 2P = 4'8" x 10'5 & 15/16", yep both the same, and the fireboxes. On 30/08/2019 at 12:31, Talltim said: I assume that’s 4’8” diameter and 10’5” long. What’s the 15/16”, the thickness of the steel? Also I assume the length is not including firebox? 10''5 & 15/16" means 1/16th of an inch short of 10ft 6in. the firebox adds another nominally 7ft, that's where the '7' in 'G7' comes from. Link to post Share on other sites More sharing options...
Jol Wilkinson Posted November 27, 2021 Share Posted November 27, 2021 Does the quoted diameters include cladding or does that have to be added? It is something I have come across when designing etched kits. Link to post Share on other sites More sharing options...
RMweb Premium Michael Edge Posted November 28, 2021 RMweb Premium Share Posted November 28, 2021 Boiler dimensions don’t include cladding, they can only be used as a rough guide to the outside appearance of the loco. 1 Link to post Share on other sites More sharing options...
Jol Wilkinson Posted November 28, 2021 Share Posted November 28, 2021 That is what I would expect, Mike, but it also depends on the source of the information. Some people quote "over cladding" figures, from outline or model drawings. As the OP was about planning a 4F, I expect it is the overall cladding dimension that is relevant. Link to post Share on other sites More sharing options...
PenrithBeacon Posted November 28, 2021 Share Posted November 28, 2021 LMS Locomotive Profiles No.10 The Standard Class 4 Goods 0-6-0s This is the book needed to resolve the issues. Link to post Share on other sites More sharing options...
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