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LM 319 diagrams

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MatthewRead

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Do these units have any booked weekend diagrams on the West Coast Main line?
I've never seen any at the weekend only on the Abbey Flyer.
 
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Bletchleyite

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So what was the point of London Midland taking them on :o

Depends on the precise question :)

I don't think they envisaged them being quite as unreliable as they have been, and extra capacity is sorely needed on the south WCML.

If you mean why did ScotRail take the 321s and not 319s themselves, it's because of a slight difference in configuration of equipment between 319s and 321s, which are otherwise very similar. A 321's second trailer coach is near enough a piece of LHCS - it doesn't contain any important equipment, so can be removed, and ScotRail needed 3-car units to be able to operate in 3 or 6 car formation due to platform lengths. A 319 has equipment on both trailers so conversion to 3-car would be far costlier.
 

Bungle965

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Depends on the precise question :)

I don't think they envisaged them being quite as unreliable as they have been, and extra capacity is sorely needed on the south WCML.

If you mean why did ScotRail take the 321s and not 319s themselves, it's because of a slight difference in configuration of equipment between 319s and 321s, which are otherwise very similar. A 321's second trailer coach is near enough a piece of LHCS - it doesn't contain any important equipment, so can be removed, and ScotRail needed 3-car units to be able to operate in 3 or 6 car formation due to platform lengths. A 319 has equipment on both trailers so conversion to 3-car would be far costlier.

In addition to this Class 321 also have slightly more power output than the 319, stations are closer together in general on ScotRail than they are on LM so that bit more power is needed.
Sam
 

A0

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Add in Scotrail already had the class 320s which are essentially 3 car class 321s.
 

AM9

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In addition to this Class 321 also have slightly more power output than the 319, stations are closer together in general on ScotRail than they are on LM so that bit more power is needed.
Sam

I doubt that the very slight difference in power to weight ratio would influence their preference. Much more likely the fact that they already have 320s and are familiar with them. As we have seen in both the NW and LM cascaded EMUs, having experience with a particular class is much more important for in-service availability than a perception of inherited units' reliability.
 

Bungle965

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I doubt that the very slight difference in power to weight ratio would influence their preference. Much more likely the fact that they already have 320s and are familiar with them. As we have seen in both the NW and LM cascaded EMUs, having experience with a particular class is much more important for in-service availability than a perception of inherited units' reliability.

Of course yes.
Sam
 
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