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DavidB-AU

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  1. Details of a £96bn investment that the prime minister vows will transform Britain's rail network are set to be unveiled on Thursday. The Midlands and North of England will get the bulk of the money, which is being touted as the biggest ever public investment in rail. https://www.bbc.com/news/business-59320576
  2. For North American N, I'd look at the methods used by modular systems such as Free-moN and FREMO-americaN which are tried and tested, and very robust. Cheers David
  3. Any excuse for a Jago Hazzard video... Even if it hadn't been bombed I doubt it would have had much of a future.
  4. A few that (as best I can work out) were not intentionally temporary and appeared in public timetables. Sleightholme on the Carlisle and Silloth Bay Railway, opened September 1856, closed to passengers June 1857. Wray on the Little North Western, opened November 1849, closed to passengers May 1850. Roman Road on the Leeds and Selby Railway, opened 22 September 1834, closed to passengers 10 November 1834. Bedlay on the Monkland and Kirkintilloch Railway, opened 10 December 1849, closed to passengers 31 December 1849. Cheers David
  5. There is some complex physics and mathematics behind this. The short version is because the connecting rod is (usually) angled, the mid point of piston travel and the top and bottom positions of the crank don't exactly correspond. As a result, valve events are very slightly offset from the theoretical intervals. What you hear as a volume difference is because valve timing is not uniform even when "properly" timed. Even on a 2 cylinder loco with perfectly quartered cranks, one exhaust beat per rotation will always be louder. This is less noticeable at low speed when there is a longer time between exhaust beats. This gets more complicated if any of the cylinders are inclined. W.A. Tuplin explained this in one of his books but the mathematics went way over my head. It gets even more complicated with some 4 cylinder locos. The cranks are usually set at 90 degrees with the inside and outside cranks on each side at 180 degrees to each other, giving 4 beats per revolution. There were oddities like the Lord Nelsons which had the inside cranks at 90 degrees and the outside cranks at +/- 135 degrees giving 8 beats per revolution. It looks odd when drawn but gives one stroke every 45 degrees. There is another effect causing a difference in volume because the forward portion of most cylinders contains slightly more steam than the rear portion, as the rear portion contains a piston rod. When the forward portion is compressed and discharges. the exhaust beat will be slightly louder. You don't get this effect on double guided pistons with rods protruding from the front of the cylinder. On a 2 cylinder loco you quite often hear 2 slightly louder beats followed by 2 slightly quieter ones. On a 3 cylinder loco you often hear 3 slightly lounder beats then 3 slightly quieter ones. EDIT: I can hear this in parts of the above video. EDIT2: If you isolate the audio track from the video (done here with Audacity) it is indeed 3 and 3. So 3 consecutive louder beats per revolution rather than one Cheers David
  6. Actually that train has been modelled and even exceeded. AMRA WA has a monster HO layout called Arid Australia where they do run full length iron ore trains.
  7. That's one of the worst edited videos I've ever seen. Leigh Creek isn't anywhere near the largest and half the shots in the supposed #1 segment were in a different state. This is the (Guinness certified) longest and heaviest train in history. https://www.youtube.com/watch?v=9LsuNWjRaAo
  8. Spain’s state-owned train company Renfe is looking at operating a new high-speed rail link between London and Paris, a move that would place it in direct competition with Eurostar. https://www.ft.com/content/ba9197f8-5232-4f21-9e7b-0378a687733e
  9. I have to ask, but why? I have no desire to deposit atomised mineral oil all over the rollingstock and track. Cheers David
  10. Not me but I did once see a great exhibition layout that was a generic modern TMD. It could be operated as the green or blue era simply by changing the road vehicles and one advertising sign. Cheers David
  11. Nah, if it was Ryanair they would start at Stevenage and terminate at Berwick-upon-Tweed and call them "London" and "Edinburgh". EDIT: and every brake application would be emergency before a "hard nudge" into the buffers. Cheers David
  12. There was at least one occasion when an 87 hauled the Royal Train which included the 1920 LNWR saloon. Cheers David
  13. If it's set on the northern part of the WCML, your fiddle yard/open storage sidings could be based on any number of goods loops such as Oubeck, Grayrigg or Quintinshill. You might even be able to base the whole thing on something like Oxenholme. Cheers David
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