Intercity 225's
Discussion
Spent a bit of time and Reading station yesterday and watched a couple of these come in and out (I think they are called 225's anyway)and got to wondering...
Do the trains push and pull, the rear engine was obviously on, you could hear it, or is the train just iddling... If the trains is actually pushing, does the front start to pull, as they leave the station, and the rear one engage after the train is moving, or do they both apply the power at the same time, I would imagine they have radio comms between front and back engines....
Do the trains push and pull, the rear engine was obviously on, you could hear it, or is the train just iddling... If the trains is actually pushing, does the front start to pull, as they leave the station, and the rear one engage after the train is moving, or do they both apply the power at the same time, I would imagine they have radio comms between front and back engines....
Intercity 125s is the term (225s are electric trains that run on the East Coast Mainline).
To answer your question, on the 125s (or HSTs as I know them. High Speed Trains), the rear powercar will be pushing just as the front is pulling. It's all done from the leading cab. It is usually all done at the same time but there can sometimes be a delay in the back powercar picking up power.
To answer your question, on the 125s (or HSTs as I know them. High Speed Trains), the rear powercar will be pushing just as the front is pulling. It's all done from the leading cab. It is usually all done at the same time but there can sometimes be a delay in the back powercar picking up power.
43034 said:
Intercity 125s is the term (225s are electric trains that run on the East Coast Mainline).
To answer your question, on the 125s (or HSTs as I know them. High Speed Trains), the rear powercar will be pushing just as the front is pulling. It's all done from the leading cab. It is usually all done at the same time but there can sometimes be a delay in the back powercar picking up power.
And that's straight from the horses mouth. To answer your question, on the 125s (or HSTs as I know them. High Speed Trains), the rear powercar will be pushing just as the front is pulling. It's all done from the leading cab. It is usually all done at the same time but there can sometimes be a delay in the back powercar picking up power.
davepoth said:
Love it!!When i used to go to London it was always an event on a 125, proper sense of occassion arriving in Paddington! Slam doors and V12's...proper!
If you want to sample a proper engine on the mainline, hurry up! These are the only company who use Valentas http://www.grandcentralrail.co.uk/ 2 have just gone in for MTU-ing, due out in September.
The booked turns for HSTs are shown here: http://www.125group.org.uk/diagrams-GC.pdf They vary though, so it is pot luck. Allocations are posted up on another forum I'm on most days (hstgen.co.uk, unsure if this is allowed to be linked, not really advertising?)
East Midlands Trains still use Paxman engines, just that they're VP185s instead of Valentas.
Valenta: 1 big turbo
http://www.youtube.com/watch?v=C1ICcOu0NkM (Fan howling like a right b
h too!) Pure porn though, so over 18s only!
VP185: 4 smaller turbos
http://www.youtube.com/watch?v=fcCunXRgoKk
MTU: 6 minute turbos
http://www.youtube.com/watch?v=tmpKkJ5nuUQ
Oh, if you want the turbo to power your car, it takes a minimum of a 1.4l engine just to power the turbo....
And..... If you want to see a set preserved after their working life, join this group http://www.125group.org.uk They already have numerous engines and turbos!
If anyone has any further questions, feel free to ask. I will try my best to answer them (or ask some mates more experienced in the subject than I!)
PPS: 43034 was the best one of the lot. Lots of over-notching and a nice wonky governor...
The booked turns for HSTs are shown here: http://www.125group.org.uk/diagrams-GC.pdf They vary though, so it is pot luck. Allocations are posted up on another forum I'm on most days (hstgen.co.uk, unsure if this is allowed to be linked, not really advertising?)
East Midlands Trains still use Paxman engines, just that they're VP185s instead of Valentas.
Valenta: 1 big turbo
http://www.youtube.com/watch?v=C1ICcOu0NkM (Fan howling like a right b
h too!) Pure porn though, so over 18s only!VP185: 4 smaller turbos
http://www.youtube.com/watch?v=fcCunXRgoKk
MTU: 6 minute turbos
http://www.youtube.com/watch?v=tmpKkJ5nuUQ
Oh, if you want the turbo to power your car, it takes a minimum of a 1.4l engine just to power the turbo....
And..... If you want to see a set preserved after their working life, join this group http://www.125group.org.uk They already have numerous engines and turbos!
If anyone has any further questions, feel free to ask. I will try my best to answer them (or ask some mates more experienced in the subject than I!)
PPS: 43034 was the best one of the lot. Lots of over-notching and a nice wonky governor...
As said before its done electronically from the front power car.
The rear engine normally supplies the Electric Train Supply (air con, lights etc) and revs to notch 2 (out of 7) on the fuel rack to do this.
In the event of one engine failing the remaining engine has to do supply the ETS as well as traction, leading to a bit of a stagger at times!
The rear engine normally supplies the Electric Train Supply (air con, lights etc) and revs to notch 2 (out of 7) on the fuel rack to do this.
In the event of one engine failing the remaining engine has to do supply the ETS as well as traction, leading to a bit of a stagger at times!
43034 said:
Valenta: 1 big turbo
http://www.youtube.com/watch?v=C1ICcOu0NkM (Fan howling like a right bh too!) Pure porn though, so over 18s only!
It made the light at the end of the platform quiver. http://www.youtube.com/watch?v=C1ICcOu0NkM (Fan howling like a right b
h too!) Pure porn though, so over 18s only!
neilb62 said:
As said before its done electronically from the front power car.
The rear engine normally supplies the Electric Train Supply (air con, lights etc) and revs to notch 2 (out of 7) on the fuel rack to do this.
In the event of one engine failing the remaining engine has to do supply the ETS as well as traction, leading to a bit of a stagger at times!
Only 5 notches in Powercars mate. The rear engine normally supplies the Electric Train Supply (air con, lights etc) and revs to notch 2 (out of 7) on the fuel rack to do this.
In the event of one engine failing the remaining engine has to do supply the ETS as well as traction, leading to a bit of a stagger at times!
Engine responses to notches were covered on another forum not too long. I shall copy and paste the main post. I won't claim for it to be mine, but I know the bloke who wrote it won't mind me adding it here!
"When you select N1, lots of things happen, but the summary being the traction motor contactors close and the main alternator excitation begins which starts some current flowing down those traction cables. There is no change to the engine speed - in fact the governor knows bugger all about N1 being selected on a Valenta car! What you will find though is the governor will keep the engine at 750rpm regardless (within reason) of the several hundred amps now being requested of the alternator. If you leave it long enough in N1 you'll find the Valenta starts rattling quite a bit as it tries to cope with the load at low revs. Now, going straight to N2 does all the above plus asks the governor for 1000 rpm please. So the engine speeds up and the alternator excitation begins.
When you go from N1 to N2 if you leave it until the load builds up a bit usually results in a slightly quicker opening up of the Valenta (and VP/MTU) as the governor is fighting against a heavy load already.
There is another crucial difference: there is a limit relay on the limit board (only a wee small thing) that comes into play on the car providing ETS; if this didn't exist the ETS power car would only be able to do an impression of N2 even when the driver selected N1. The relay puts a limit on the amount of power the ETS power car gives when in N1 - when N2 is selected, the relay opens and the power can increase to the N2 maximum. You can actually hear this more clearly on a VP car than anything else - you suddenly hear the VP clanking much harder when N2 is selected vs N1, which most EMT drivers seem very keen on. Bring back BR East Coast driving techniques!"
EDIT: Missed this post
Yertis said:
43034 said:
Intercity 125s is the term (225s are electric trains that run on the East Coast Mainline).
To answer your question, on the 125s (or HSTs as I know them. High Speed Trains), the rear powercar will be pushing just as the front is pulling. It's all done from the leading cab. It is usually all done at the same time but there can sometimes be a delay in the back powercar picking up power.
And that's straight from the horses mouth. To answer your question, on the 125s (or HSTs as I know them. High Speed Trains), the rear powercar will be pushing just as the front is pulling. It's all done from the leading cab. It is usually all done at the same time but there can sometimes be a delay in the back powercar picking up power.
Only* nameplate I would ever consider buying. Shame it's under lock and key atm. Silly bank wanting it back!- = Tell a lie, would consider buying Arrow ex 67017 too.
Edited by 43034 on Friday 6th August 21:21
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