ScotRail HST Introduction - Updates & Discussion

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InvHst

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9 Dec 2018
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Need to get 43128 out now. As far as I know this hasn’t worked since arriving in Scotland.

43128 is the last one I need to see however nobody seems to know just where it is and what condition its in haha

On another note 43138 which has been out of use at Inverness for almost 2 years is back in service. At Eastfield this morning.

I'm sure 43138 had been out in service back for a wee while might of been out for a month or so but regardless good to see the powercars that have been missing
 

najaB

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ls2270

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I know we shouldn't read too much into timing loads, but locomotive rather than locomotive plus load makes me think it's power cars.
It’s real headcode 5S23, formed of 43149 and 43135 hauling 40608, 42019, 42571 and 42275.

Also running today is 0S01, 0621 Slateford Yard to Haymarket Depot, formed of 43003 and 43179 with 40602, 42292, 42562 and 42045.
 

Stathern Jc

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It’s real headcode 5S23, formed of 43149 and 43135 hauling 40608, 42019, 42571 and 42275.

Also running today is 0S01, 0621 Slateford Yard to Haymarket Depot, formed of 43003 and 43179 with 40602, 42292, 42562 and 42045.
Interesting to see the plan for 2 separate 2+4 moves on the same day.
If this is for the purposes of moving a couple of coaching sets for some snagging work, is there a reason that they couldn't be marshalled into a 2+8 set for the move? Surely it would save extra pathing and crewing costs.
 

Gordonman

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It’s real headcode 5S23, formed of 43149 and 43135 hauling 40608, 42019, 42571 and 42275.

Also running today is 0S01, 0621 Slateford Yard to Haymarket Depot, formed of 43003 and 43179 with 40602, 42292, 42562 and 42045.
Very strange headcode for 5S23 when heading south

Pretty sure the 0S01 move would be powercars only otherwise it would run as 5S01.

I'm also pretty sure that HA02 has already gone to Wabtec behind 47812 last week.
 

hexagon789

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AIRC most of the later deliveries were timed as 125.
But afaik they aren't allowed to run at that due to reduced maximum brakeforce on ex-FGW power cars restricting maximum speeds of short sets. GWR 'Castles' are restricted to 100 for 2+4 and 90 for 2+3 sets for example.
 

ls2270

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Very strange headcode for 5S23 when heading south

Pretty sure the 0S01 move would be powercars only otherwise it would run as 5S01.

I'm also pretty sure that HA02 has already gone to Wabtec behind 47812 last week.
Whilst I agree with your sentiments about the headcodes, the source of my information was an official email from Rail Operations Group.
 

PG

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But afaik they aren't allowed to run at that due to reduced maximum brakeforce on ex-FGW power cars restricting maximum speeds of short sets. GWR 'Castles' are restricted to 100 for 2+4 and 90 for 2+3 sets for example.
Surely more coaches=more brakeforce?
I'm probably wrong but my understanding is that the brakeforce of the PCs is fixed and it's the number of coaches that enables longer rakes to operate at higher speeds.
 

hexagon789

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Surely more coaches=more brakeforce?
I'm probably wrong but my understanding is that the brakeforce of the PCs is fixed and it's the number of coaches that enables longer rakes to operate at higher speeds.
I thought the deliveries were usually 2+4 formations?

On the point of GWR Castles being speed restricted, I was informed by two individuals - one on this forum and one on another forum (the latter was involved in braking trials with BR in the 1980s, the former kindly contacted a colleague involved with HSTs regarding a query of mine) that FGW had reduced the maximum brake cylinder pressure on their power cars to reduce brake pad wear on power cars (occurring due to the power cars being found to be doing the majority of the effective braking during light applications), tests proved this didn't significantly affect braking distances of 2+7 and 2+8 sets but shorter sets had to be speed restricted. Other operators power cars were not so treated afaik.

Otherwise post two-stage brake disabling and brake pad material change, there is no physical need to speed restrict short sets as power cars alone can meet the W125 curve throughout the speed range unless they too have had the modification on power cars.
 

cakefiend

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But afaik they aren't allowed to run at that due to reduced maximum brakeforce on ex-FGW power cars restricting maximum speeds of short sets. GWR 'Castles' are restricted to 100 for 2+4 and 90 for 2+3 sets for example.
They are most definitely allowed to run at 125mph.
 

Railperf

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They are most definitely allowed to run at 125mph.
2+3 sets are definitely running up to 100mph in practice. The 100mph limit may just be a TOC policy. I was on a very late running 2+4 non-stop (intermediate stops skipped) from Taunton to Bristol - no attempt was made to exceed 100mph on the 110mph stretch.
 

hexagon789

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They are most definitely allowed to run at 125mph.
Not saying you're wrong, but can I ask how you know if you don't mind?

2+3 sets are definitely running up to 100mph in practice. The 100mph limit may just be a TOC policy. I was on a very late running 2+4 non-stop (intermediate stops skipped) from Taunton to Bristol - no attempt was made to exceed 100mph on the 110mph stretch.
That may be the case, but a GWR driver told me the training manual for the Castle sets prescribed the above mentioned limits, hence why I listed them.
 

InOban

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Now says cancelled 'due to an excluded reason'. Not seen that before. Anyone able to enlighten us?
 

hexagon789

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Is this anything to do with the HSTs or is it a Sprinter/Turbo move please?

While the timing load is of course not an accurate indicator, it does say 90mph Sprinter rather than the usual "diesel locomotive, trailing xxx tonnes" which the HSTs usually get described with
 

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