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Post by Deleted on Nov 4, 2006 1:03:06 GMT
In a previous post, prjb said that the S stock will be a low-floor train, and that as a result it would have wheels similar in diameter to D stock.
How does this smaller wheel size affect things such as adhesion, acceleration/braking, cant rail component location, top speed and general 'feel' from the driver's perspective? I would have thought that using full size wheels and being a bit more creative with component placement below the solebar would provide economies of scale, as Metronet SSL can save money by buying "off-the-shelf" wheels/wheelsets/wheel lathes.
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Post by Deleted on Nov 4, 2006 1:06:03 GMT
AFAIK the D stock have the same size wheels as the tube stocks. So if S stock has the same it will mean that all LU trains have the same size wheels.
Having driven C stock (big wheels) and D stock (small) I can't say I've noticed any difference due to the wheel size, but then the two trains are so different in so many ways that it's hard to say.
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Post by Deleted on Nov 4, 2006 1:11:28 GMT
AFAIK the D stock have the same size wheels as the tube stocks. So if S stock has the same it will mean that all LU trains have the same size wheels. Indeed. I was thinking more in terms of sharing wheels with National Rail stock, for which there are undoubtedly hundreds already available (and dozens of companies vying to sell them to the TOCs). Having driven C stock (big wheels) and D stock (small) I can't say I've noticed any difference due to the wheel size, but then the two trains are so different in so many ways that it's hard to say. In theory, bigger wheels mean less effort needed from the traction motors, which may result in lower energy consumption, at the expense of higher speeds (I think!). |
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prjb
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LU move customers from A to B, they used to do it via 'C'.
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Post by prjb on Nov 6, 2006 20:42:27 GMT
My engineering colleagues tell me that 'S' and 09ts wheels will be interchangeable (subject to some associated 'bits and bobs' being removed) at 700mm.
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Post by Deleted on Nov 6, 2006 20:47:02 GMT
And is this size similar to the size used by the 1967/1972/1992TS?
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prjb
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LU move customers from A to B, they used to do it via 'C'.
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Post by prjb on Nov 6, 2006 23:34:02 GMT
I believe (and stand to be corrected) that 700mm is slightly smaller than current LU tube stock wheels.
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