Wickham Green too Posted January 25 Share Posted January 25 1 hour ago, Fishplate said: When in BR(S) Gauging section, we went to survey a short tunnel. Can't remember the location. ... Tanners Hill ? .................. only 87 yards but your chainman's assertion was more than questionable ! 1 Link to post Share on other sites More sharing options...
RMweb Premium Welly Posted January 26 RMweb Premium Share Posted January 26 21 hours ago, Jeremy Cumberland said: I've done land surveying using chains, but they were metric by then: 20 metres. They were still divided into 100 links, though, and seeing this finally explained what was probably the weirdest measurement on the back of my school exercise book: 1 link = 7.92 inches. Also, 25 links = 1 rod, pole or perch = ¼ chain, which is probably rather more informative than the seemingly random 1 rod, pole or perch = 5½ yards. Reminds me of Grandpa Simpson's rant at metric https://www.youtube.com/watch?v=z5-s-4KPtD8 Link to post Share on other sites More sharing options...
2251 Posted January 26 Share Posted January 26 The chain (more accurately Gunter's chain, named after the man who invented it) is metric, after a fashion. The point of it is that it is divided into links each of 1/00 of a chain and one square chain equals 1/10 acre. That makes surveying reasonably straightforward -- the sums to obtain an area figure in square chains are base 10, and (likewise) all that needs to be done to turn a result in square chains into a (decimal) acres figure is to divide by 10 (and old OS maps and so on show area figures in decimal acres). For example, suppose a square area measures 1.27 by 3.56 chains. That equals 4.5212 square chains (1.27 x 3.56) or 0.45212 acre (4.5212 divided by 10). Apologies for the massive thread drift. 3 4 1 Link to post Share on other sites More sharing options...
Artless Bodger Posted January 26 Share Posted January 26 5 hours ago, 2251 said: (and old OS maps and so on show area figures in decimal acres). Thank you, I'd often wondered what those numbers meant in the middle of fields etc. Link to post Share on other sites More sharing options...
RMweb Premium brushman47544 Posted January 26 RMweb Premium Share Posted January 26 All i remember is that one chain is the length of a cricket pitch (i.e. between the stumps) and equals 22 yards. 1 Link to post Share on other sites More sharing options...
2251 Posted January 26 Share Posted January 26 39 minutes ago, Artless Bodger said: Thank you, I'd often wondered what those numbers meant in the middle of fields etc. There are usually two numbers. The first is a reference number (so you can refer to "field 27", for example) and the second is the area in acres to three decimal places. Here is an example (with some railway included to try to keep this on-topic): 2 4 Link to post Share on other sites More sharing options...
montyburns56 Posted January 26 Share Posted January 26 Stoke Prior 2020 by Thomas Stobbs 14 Link to post Share on other sites More sharing options...
RMweb Gold SHMD Posted January 26 RMweb Gold Share Posted January 26 Is that a Hornby train set? Kev. 1 2 8 Link to post Share on other sites More sharing options...
25kV Posted January 26 Share Posted January 26 It's an "Exclusive Dining Experience ... 125". 2 Link to post Share on other sites More sharing options...
RMweb Premium melmerby Posted January 26 RMweb Premium Share Posted January 26 26 minutes ago, SHMD said: Is that a Hornby train set? Kev. No The coach would be extra.🙂 2 1 Link to post Share on other sites More sharing options...
RMweb Premium melmerby Posted January 26 RMweb Premium Share Posted January 26 8 hours ago, 2251 said: The chain (more accurately Gunter's chain, named after the man who invented it) is metric, after a fashion. Bit like BA screw threads, often considered part of the imperial measurements. They are based on 0BA being 6mm over thread peaks and each successive size is a fixed fraction of the previous one. (0.9 times to 2 significant figures (metric), then converted to thousanths of an inch and quoted to 1 significant place. 2 Link to post Share on other sites More sharing options...
pH Posted January 26 Share Posted January 26 12 minutes ago, melmerby said: Bit like BA screw threads, often considered part of the imperial measurements. They are based on 0BA being 6mm over thread peaks and each successive size is a fixed fraction of the previous one. (0.9 times to 2 significant figures (metric), then converted to thousanths of an inch and quoted to 1 significant place. Is there an app for that? 2 Link to post Share on other sites More sharing options...
Michael Hodgson Posted January 26 Share Posted January 26 4 hours ago, Artless Bodger said: Thank you, I'd often wondered what those numbers meant in the middle of fields etc. Oh, so it's not the number of cows? 7 Link to post Share on other sites More sharing options...
Wickham Green too Posted January 28 Share Posted January 28 On 26/01/2024 at 19:49, pH said: Is there an app for that? App-roximate ? - no it's exact. 1 Link to post Share on other sites More sharing options...
RMweb Premium Rich_F Posted January 28 RMweb Premium Share Posted January 28 Have class 20s & Class 43s ever worked together on a freight? 18 Link to post Share on other sites More sharing options...
Matt37268 Posted January 29 Share Posted January 29 17 hours ago, Rich_F said: Have class 20s & Class 43s ever worked together on a freight? They have now! 2 Link to post Share on other sites More sharing options...
montyburns56 Posted February 4 Share Posted February 4 Leeds 1990 by Neil Young 11 Link to post Share on other sites More sharing options...
Mol_PMB Posted February 4 Share Posted February 4 1 minute ago, montyburns56 said: Leeds 1990 by Neil Young Not just the wrong way round, but apparently coupling up to the Manchester/Liverpool Pullmans. Were they even compatible? I know the Mk2 Pullmans were fussy about what they could be hauled by. Link to post Share on other sites More sharing options...
Wickham Green too Posted February 4 Share Posted February 4 While we're on a*** about face 91s - here are a couple of oddities I scanned the other day : - Kings Cross : 19/9/98 Doncaster : a little later ( Wasn't there a recent thread about 90s with MkIV stock ? - I couldn't track it down ! ) 10 Link to post Share on other sites More sharing options...
RMweb Premium Steven B Posted February 5 RMweb Premium Share Posted February 5 (edited) 17 hours ago, Mol_PMB said: Not just the wrong way round, but apparently coupling up to the Manchester/Liverpool Pullmans. Were they even compatible? I know the Mk2 Pullmans were fussy about what they could be hauled by. Mk2 Pullmans's had standard drop-buck eye couplings so no problem there. They were converted to air-brakes in 1986. When built they could only run with AC electrics due to their need for a 800V AC train supply. I believe the work carried out in 1986 resulted in them being able to run behind a wider range of locos. The set was used by Interciy charters, with the set being named Lakeland Pullman with appropriate car names). There are a couple more photos of the same train on Flickr: Whitehall Junction. by Keith Long, on Flickr Leeds Whitehall Junction. by Keith Long, on Flickr And heading up to Copy Pit with class 25 Tamworth Castle on the front: D7672 Holme Chapel 291290 img375-1090MAH-a by Tony Woof, on Flickr Steven B Edited February 5 by Steven B 12 1 Link to post Share on other sites More sharing options...
DavidB-AU Posted February 5 Share Posted February 5 More from the same gallery of 91s hauling additional bank holiday trains. 14 Link to post Share on other sites More sharing options...
montyburns56 Posted February 5 Share Posted February 5 21 hours ago, Mol_PMB said: Not just the wrong way round, but apparently coupling up to the Manchester/Liverpool Pullmans. Were they even compatible? I know the Mk2 Pullmans were fussy about what they could be hauled by. Well you wouldn't want any old riff raff getting intimate with the Pullmans. 3 Link to post Share on other sites More sharing options...
Mol_PMB Posted February 5 Share Posted February 5 36 minutes ago, montyburns56 said: Well you wouldn't want any old riff raff getting intimate with the Pullmans. As Steven noted above, as-built they were only operationally compatible with vac-braked ac electric locos, which narrowed down the options considerably. Link to post Share on other sites More sharing options...
RMweb Premium Ian Morgan Posted February 7 RMweb Premium Share Posted February 7 Run out of telegraph poles? Just use a model tree instead: 11 1 6 Link to post Share on other sites More sharing options...
Southernman46 Posted February 7 Share Posted February 7 Woking ? Link to post Share on other sites More sharing options...
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