North Wales coast notice board

[connor7777]

On the notice board page I cas see a picture of 3 different clssses coupled together, class 153 on the front, 150 in the middle and 158 on the back. The train was n passenger use, just departing Llandudno Junction to Cardiff.

Now what I would like to know is, if 158 is faster than 153, so would that mean the train would go faster if the 158 was on the front, I am a bit confused about that you see.

Any advice. cheers.

 

[First class]

A consist of units generally has to travel at the maximum permitted speed of the slowest unit.

e.g. if the 158 could do 90mph, and the 153 could do 75mph, the train wouldn't generally be permitted to exceed 75mph.

So in your example, it would not make the train go any quicker just by changing what unit leads, although I'm sure the driver would prefer the 150/158 cab to the 153!

 

[connor7777]

Cheers for that, it is a great picture, I dont know if you saw it yet.

 

[merlodlliw]

Connor I put it up last week, you must have missed it. I called it Leopards Milk Flotilla,there will be more of these soon.


Bob

 

[northwichcat]

If you're ever on a 150 attached to a 142 you can feel the 142 trying to make the 150 bounce with it.

 

[connor7777]

slightly off topic, but wouldnt it be awesome if we were able to couple a 153 on the back on a pendolino, and do 120mph. haha can imagine that.

 

[tbtc]

slightly off topic, but wouldnt it be awesome if we were able to couple a 153 on the back on a pendolino, and do 120mph. haha can imagine that.

Well, no, because it couldn't do that speed, as I thought had been explained. A Bullet Train coupled to a Parry People Mover would have its speed governed by the maximum speed of the slower train.

 

[connor7777]

yes but wont the whels just turn in line with the faster train?

 

[MidnightFlyer]

Not really. Lowest max speed is the speed that must be obeyed, as has been said twice now.

 

[ChrisCooper]

As long as the coupling is compatable, you could drag any train along at higher than it's top speed. What sort of ride it would give, whether it would even stay on the track, and what damage it would do to it is another question. A 158+Sprinter combination could I'm sure do 90mph easily. In the days before OTMR I've clocked Sprinters at over 85mph on their own. All trains are capable of safely overspeeding by 10% anyway. If you could find some way of coupling them together you could drag a PPM behind a Eurostar up to 186mph, but I wouldn't want to be in the PPM whilst doing it.

 

[junglejames]

Well, no, because it couldn't do that speed, as I thought had been explained. A Bullet Train coupled to a Parry People Mover would have its speed governed by the maximum speed of the slower train.

Are you sure he wasnt joking when he said that? Thats what i took it as.

 

[Geezertronic]

Not really. Lowest max speed is the speed that must be obeyed, as has been said twice now.

Can you say it again once more?

 

[ralphchadkirk]

Are you sure he wasnt joking when he said that? Thats what i took it as.

Worringly, I don't think he is.

Can you say it again once more?

Certainly -I'll do it on Matt's behalf: Not really. Lowest max speed is the speed that must be obeyed, as has been said twice now.

As long as the coupling is compatable, you could drag any train along at higher than it's top speed. What sort of ride it would give, whether it would even stay on the track, and what damage it would do to it is another question. A 158+Sprinter combination could I'm sure do 90mph easily. In the days before OTMR I've clocked Sprinters at over 85mph on their own. All trains are capable of safely overspeeding by 10% anyway. If you could find some way of coupling them together you could drag a PPM behind a Eurostar up to 186mph, but I wouldn't want to be in the PPM whilst doing it.

As has been said 3 or 4 times now, no you couldn't. The WHOLE train must travel at the speed of the slowest permitted speed in the formation.

 

[OxtedL]

Under the rules yes, but theoretically, of course you could, surely. There's nothing in the PPM which brings the whole formation to a stop above 40mph!

I think it has been said on here before (a long time ago) you can get a 158 coupled to a pacer to go faster than 75mph, but the Pacer suffers a bit and the driver gets into trouble if caught...

 

[tbtc]

Under the rules yes, but theoretically, of course you could, surely. There's nothing in the PPM which brings the whole formation to a stop above 40mph!

I think it has been said on here before (a long time ago) you can get a 158 coupled to a pacer to go faster than 75mph, but the Pacer suffers a bit and the driver gets into trouble if caught...

This is starting to sound more like a Braniac experiment

 

[OxtedL]

This is starting to sound more like a Braniac experiment

 

[Welshman]

Worringly, I don't think he is.


Certainly -I'll do it on Matt's behalf: Not really. Lowest max speed is the speed that must be obeyed, as has been said twice now.


As has been said 3 or 4 times now, no you couldn't. The WHOLE train must travel at the speed of the slowest permitted speed in the formation.

But does it depend on the driver remembering s/he has a unit with a lower speed restriction in the train, or is there some kind of mechanical/electrical reminder/restricter in the cab?

I just have in mind the time when GNER were overhauling the cl.91 fleet and borrowed a cl.90 for use on the Leeds services, and the [apocryphal] tales of a driver finding s/he couldn't work the train up to more than about 115mph on the journey to London, and upon walking to the other end to return, finding a very hot cl.90!