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CTRL to benefit Kent: What services?
Add on to Richard's excellent summary that the trains need to be capable
of running with AWS, TPWS, TVM, KVB, to fit the UK standard loading gauge, to be able to support CSR and GSM-R, to satisfy the EMI/EMC characteristics of the UK conventional trains, to operate at both 25kV and 750DC with automated changeover between the two, possibly to have a capability to work on limited 25kV current if they escape to a BR AC area, etc. John In article , Richard Catlow writes Alex Terrell wrote: I pointed out that the Amtrak Metroliners had proved decades ago that front doors weren't incompatible with high speeds, and they passed that info on to the train manufacturers. Yes indeed the Metroliners do have end corridor connections, but if I recall correctly they are limited to 125 MPH. Until the end of 2001 I was the head of Electrification & Plant for Union Railways and was initmately involved in the development of the CTRL domestic rolling stock specification. A few facts: The units have to be 6 coaches long in order to prevent both pantographs (1 per unit) from entering the long carrier wire neutral setions. If they did, a phase to phase short circuit at 44kV would result. In order to maintain the required line capacity, the units were specified to have a top speed of 140MPH (225 Km/h), with a high rate of accelleration. The crashworthiness standards for stock of this speed are very stringent unless you want to end up with the farce applied to the like of pendolinos where the front half of each leading vehicle cannot be used for passenger accommodation - a complete non starter for a commuter train where bums on seats is paramount. We consulted 7 rolling stock manufacturers over the crashworthiness standards and end loadings and not one of them could satisfactorily engineer the requisite stength with a central corridor connection. So for other posters on this thread - 16 train cars? Are you serious. Which platforms could accommodate them (apart from the eurostar platforms), certainly not rural station platforms unless they were split to 2 x 8 cars. That's not in the spec, so don't expect that to happen either! Richard -- John Alexander, |
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