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To expand The Planner's answer, it is because a) they won't be able to go fast enough to avoid delaying HS2's trains and b) they wan't be able to use HS2's platforms because HS2 is being built to a different gauge altogether ...
... and they'd have to be fitted for ERTMS / ATO, which is never...
I've just been sent a link to this: https://www.amazon.co.uk/gp/product/0244815402/
Also available (cheaper) at Lulu
One for the enthusiast's Christmas stocking?
ORBIS is dead. Long live ORBIS.
A truly silly question is one asked twice ....
Anyway, the answer is one. OP didn't specify a unit, so I'm answering in units of (length of railway in London)
And yet the 14/15 satellite lounge at Manchester Piccadilly not only has sockets clearly marked for public use, but also USB sockets and a shelf on which to place the device being charged ... #betterupnorth
Check rails are designed to be in contact with the wheel backs, guard rails are placed further away from the running rail(s) and are there to manage the path of a derailed train.
It is completely possible to have one guard rail; this situation existed on the Down Oxford Road (P14 line) at...
BH is only expensive to buy because the market is so small it isn't worth big regular rolling runs.
Relaying in FB isn't automatically better, but on NR lines will allow the conversion from jointed to CWR.
Mathematically, an angle is the sound way to do it, as measuring the elevation of one rail over the other ignores the issue that the adjacent side of the triangle gets shorter. However, marking degrees up on sleepers (at any reasonably small increment) would require fractions and the error is...
Badly, as it doesn't have many (any?) 800m through lines that aren't the Independents. Also, AN other freight operator has some secluded sidings dealing with special cargo.
Some NR high output plant (HOBC / TRT) is based there too.
OK, I know its probably some kind of sand-sized blanketing material used (historically ) for clay digs, but any other information gratefully received!
Ta in advance ...
That isn't completely true - the NR standards allow for quite a variation, away from the "Main" lines, which is getting back to the OP's question. Specifying for the WCML Fasts at Wembley is easy, the interesting bits are ones to St Albans and Colne.
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