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JimC

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Posts posted by JimC

  1. If I read RCTS correctly I think they all started life as Peckett's  E Class. Once they were with the GWR they were all classed under the same diagram, but over time there were minor differences - not all received GWR chimney's for instance. So by the time they got to BR there were certainly variations, but I don't think the variations related to who owned them 30 years before.

  2. The second sample argues against it being an S. He forms the S in Sold quite differently. That presumes both are the same hand though. I tend to agree that what looks like a first character could be just a downstroke and we have three letters. Are there any other similar mystery entries, or is it just the one, and are there any entries that are unequivocably RSB? 

  3. 14 hours ago, kevinlms said:

    Really, so anyone that looks on Wikipedia is accepting the information as absolute? 

    It's quite evident that many do. 

     

    The worst thing about Wikipedia is the insistence on *not* using primary sources. A classic example of this was in the article about the GC London extension, where the Wikifanboys insisted the article should retain the nonsense about it being built to Berne gauge, since that was in a book, whereas the original gauge drawings were a primary source and invalid, and evidence from people who work on the preserved structures was original research and invalid! 

     

    The talk page is both amusing and frustrating in equal measure https://en.wikipedia.org/wiki/Talk:Great_Central_Main_Line. Someone eventually managed a form of words the fanatics would accept. I particularly like the statement that Wikipedia is about verifiability, not truth. 

     

     

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  4. My impression, reading RCTS, is that duties wouldn't have overlapped. The earlier bananas were geared for 60+ mph which might have been a bit of a struggle for the steam units. Lower geared branch line cars didn't appear until 1938. So while the very last steam and the first diesel units might have been seen together occasionally, at least at Swindon, it seems to me that the new didn't directly replace the old on the same services.

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  5. And here's the odd little Dean O-4-4 No 34, updated from back tank to pannier tank with a new boiler.
    1774114097_044-34asPT.JPG.ad6b055733cf55bda1eeae41d787d100.JPG

     

    I'm not feeling very inspired at the moment about your other missing types. The larger tank engines would be problematic since there would be issues of visibility with the length of boiler, and water capacity due to the greater diameter of the boiler reducing space for tanks.

     

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  6. 19 minutes ago, Compound2632 said:

     

    Ah yes, that was at the back of my mind. But the same point is made - wheels to the rear of the cylinders, otherwise the cylinders are held in place and supplied with steam by magic.

    But interesting, because with high set angled cylinders and small leading wheels the weight of the cylinders on that Stroudley must be a few helpful inches further back than they would be otherwise. 

     

    This is congruent to some thinking I've been doing about the (G)WR 15xx outside cylinder pannier tank. With exactly the same issues of clearance and weight distribution, I've come to the opinion that rather than designing it deliberately with a short wheelbase they had given it the longest wheelbase that was compatible with the desired outside cylinders. 

     

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  7. I haven't studied small prairie wheels, but there was a change to the design of 5'8 wheels under Collett. It was either crank moved from on a spoke to between spokes or vv, but I think the first off hand. The older design did sometimes replace the newer (oh and driving wheels were different to leading and trailing). Might be worth looking for similar variations. 

  8. 1 hour ago, Northmoor said:

    It isn't often said but those times should be considered a big improvement; this is the time for limited or non-stop services, nine minutes reduction from 41 minutes is well over 20%.  It is relatively harder to reduce times significantly on short journeys. 

    Good point, and I suggest the corollary is that on suburban routes increasing frequency would have a much bigger effect on quality of service than increasing speed.

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