Class 378 Journey times

Discussion in 'Traction & Rolling Stock' started by HSTEd, 18 Nov 2011.

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  1. HSTEd

    HSTEd Established Member

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    As I understand it a 3 carriage Cl378 has double the power of a Cl313 of equivalent length and, even accounting for the formers higher weight, therefore must be considerably faster to accelerate than the older unit.

    As I understand it Cl313s were used on some London Overground routes prior to the introduction of the new trains, I would like to know if anyone could shed any light on the magnitude of any journey time reductions stemming from the new trains.
     
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  3. swt_passenger

    swt_passenger Veteran Member

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    I've got NRTT from Dec 07, and the running times for the NLL haven't really altered much at all...

    Stratford - Richmond was about 61-63 min, it's now about 61 min
    Euston - Watford Jn seemed to be about 48 min, it's now about 51 min

    The times seem more clock face though, back in 2007 thet varied +/- a few mins, they seem to be more consistent now, but that might not be reflected in real running times I guess.
     
  4. Peter Mugridge

    Peter Mugridge Established Member

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    They're all four cars now so the power to weight ratio is a little bit lower.
     
  5. HSTEd

    HSTEd Established Member

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    Actually four carriage makes it higher as the fourth vehicle is a motored one, giving them something on order of 2400hp for four vehicles.
     
  6. Bald Rick

    Bald Rick Established Member

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    Although the 378s have more power, they are heavier and have more non traction uses for the electricity, such as air con, so their power:weight ratio, although better, isn't a huge step up.

    Also, and I have no evidence for this except using them, their 0-30 acceleration isn't much much quicker than a 313, the difference is at the higher speed ranges which on the NLL isnt much use.

    Slightly different example but a 319 roughly matches a 377 in a drag race To about 30mph, before the 319 acceleration falls off. It's something to do with power and tractive effort equations but my physics isn't that good.

    Finally, the passenger loadings on the NLL have rocketed since the 378s came in, and dwell times are longer, offsetting the small gains in running times.

    Finally finally, the slightly quicker running times has helped improve performance as minor delays are more easily recovered - LOROL are the best performing operator in the country, and have been for a while. although c2c will overtake them in January.
     
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