Max Speed on ceiling

[Egg Centric]

All non steam stock I've played simulations of has its max permitted speed on the "ceiling" - even if technically front bulkhead I mean that the driver can lookup and see what the max speed of unit/loco is. Is this some sort of requirement/standard/convention or just a coincidence?

Attached an example of the class 87 I am currently "driving" saying max speed 110mph.

 

[hexagon789]

All non steam stock I've played simulations of has its max permitted speed on the "ceiling" - even if technically front bulkhead I mean that the driver can lookup and see what the max speed of unit/loco is. Is this some sort of requirement/standard/convention or just a coincidence?

Attached an example of the class 87 I am currently "driving" saying max speed 110mph.

Do you mean does it exist in reality?

Then yes, all cabs have the maximum speed of the relevant vehicle/train written somewhere, usually over the front cab window, but a few have it at the top of the panel to the left of the driver, such as 170s or on a plate bolted to the dash such as HST power cars.

The speedometer dial also often has a red mark at the figure for the relevant maximum permitted speed as well.

Going back to the past - there are similar max speed stencils in the cabs of brand new BR diesels and electrics going back to the late-50s/early 60s, so presumably it was an official requirement of some degree.

 

[Egg Centric]

Do you mean does it exist in reality?

Then yes, all cabs have the maximum speed of the relevant vehicle/train written somewhere, usually over the front cab window, but a few have it at the top of the panel to the left of the driver, such as 170s or on a plate bolted to the dash such as HST power cars.

The speedometer dial also often has a red mark at the figure for the relevant maximum permitted speed as well.

Going back to the past - there are similar max speed stencils in the cabs of brand new BR diesels and electrics going back to the late-50s/early 60s, so presumably it was an official requirement of some degree.

I know it exists in reality. I was asking about whether it's a requirement of some kind - and if so whether it's universal (you've answered that I think) and whether there's a requirement.

And also why I guess - surely if someone signs a stock they know such basic things!

(Since posting above a possible explanation has occurred to me - subclasses - e.g. some class 37s can do 90mph and some 80mph iirc)

 

[hexagon789]

I know it exists in reality. I was asking about whether it's a requirement of some kind - and if so whether it's universal (you've answered that I think) and whether there's a requirement.

And also why I guess - surely if someone signs a stock they know such basic things!

(Since posting above a possible explanation has occurred to me - subclasses - e.g. some class 37s can do 90mph and some 80mph iirc)

Hmm, I was also thinking it would be useful when there are subclasses with different permissible speeds due to different transmission/motor gear ratios or where some members of a have been uprated but not all.

 

[driver9000]

I know it exists in reality. I was asking about whether it's a requirement of some kind - and if so whether it's universal (you've answered that I think) and whether there's a requirement.

And also why I guess - surely if someone signs a stock they know such basic things!

(Since posting above a possible explanation has occurred to me - subclasses - e.g. some class 37s can do 90mph and some 80mph iirc)

As far as I know it is a requirement to show maximum speed and vehicle identity in the cab.

 

[D365]

It would be interesting to know which standard this is/was mandated by, if anyone has it to hand.

 

[alexl92]

I know it exists in reality. I was asking about whether it's a requirement of some kind - and if so whether it's universal (you've answered that I think) and whether there's a requirement.

And also why I guess - surely if someone signs a stock they know such basic things!

(Since posting above a possible explanation has occurred to me - subclasses - e.g. some class 37s can do 90mph and some 80mph iirc)

In addition to your examples about 37s, if a driver is passed out on a mixture of second-generation DMUs (15x), some are 75pmh capable and some are 90mph so this may be another time when it's helpful

 

[ExRes]

The information should be available on the external data panel of all locos, perhaps someone somewhere started placing it in the cab as a help for drivers and it just caught on, is there an equivalent on units? I just can't remember

 

[hexagon789]

The information should be available on the external data panel of all locos, perhaps someone somewhere started placing it in the cab as a help for drivers and it just caught on, is there an equivalent on units? I just can't remember

Multiple Units have maximum speed marked in-cab as well as locos, yes

 

[ExRes]

Multiple Units have maximum speed marked in-cab as well as locos, yes

Sorry, I didn't put that too well, I meant external data panels on units

 

[hexagon789]

Sorry, I didn't put that too well, I meant external data panels on units

Ah, no worries. They have an external data panel as well yes, in the past some had them on the front end - some Pacers and 150s were like this new under BR, nowadays I believe leading vehicles only have them at the inner ends, with intermediates having them on both ends diagonally opposite.

 

[ExRes]

Ah, no worries. They have an external data panel as well yes, in the past some had them on the front end - some Pacers and 150s were like this new under BR, nowadays I believe leading vehicles only have them at the inner ends, with intermediates having them on both ends diagonally opposite.

Yes thanks @hexagon789 now you've said inner ends it all comes back to me, I may be forgetful but at least I'm not entirely senile .......

 

[DanNCL]

Out of interest what max speed do 91s, 390s and 80xs have in the cabs? With them being 140 mph stock that’s held back to 125 mph by the signalling.

 

[hexagon789]

Out of interest what max speed do 91s, 390s and 80xs have in the cabs? With them being 140 mph stock that’s held back to 125 mph by the signalling.

91s definitely have 140.

390s have 140.

80x vary I believe.

 

[RUK]

Presumably Class 91s have 140 m.p.h. written in the pointed cab, and 110 m.p.h. written in the flat cab?

 

[driver9000]

Out of interest what max speed do 91s, 390s and 80xs have in the cabs? With them being 140 mph stock that’s held back to 125 mph by the signalling.

The 802 I drive are labelled for 125 maximum and the limiter is set to 125 as a default.

It would be interesting to know which standard this is/was mandated by, if anyone has it to hand.

Section 4 of RIS-2453-RST "Vehicle registration, numbering and marking".

 

[Pyewipecarshed]

The maximum speed is there as an aide memoir for the driver.
In some TOCs, for example Northern, you might drive units with a maximum permissible speed of 75, 90 or 100 mph.
You may be driving on a route where the line speed is higher, for example 100 mph but you have a unit that is limited to 75.... it's just a quick reference to remind the driver.
The vehicle and/or unit number are there for reporting faults, so that the crew don't have to climb out to check the number whilst on the phone to maintenance control.

 

[12LDA28C]

The maximum speed is there as an aide memoir for the driver.
In some TOCs, for example Northern, you might drive units with a maximum permissible speed of 75, 90 or 100 mph.
You may be driving on a route where the line speed is higher, for example 100 mph but you have a unit that is limited to 75.... it's just a quick reference to remind the driver.
The vehicle and/or unit number are there for reporting faults, so that the crew don't have to climb out to check the number whilst on the phone to maintenance control.

No driver I've ever known has had to have an 'aide memoir' to remind them of the maximum speed of the train they are driving. Furthermore, if a driver is working a multiple unit formation where the leading unit is capable of 100mph and the rear unit can only do 75, it's probably best to ignore the 100mph sign above your head.

I suspect the in-cab maximum speed sign has rather more relevance during conducting activity where a conductor is provided who doesn't sign the traction but knows the route.

 

[D6130]

It would be interesting to know which standard this is/was mandated by, if anyone has it to hand.

Not sure....but it must have been back in the 1950s sometime....when speedometers became compulsory on all new locos and units.

Steam locos - only a minority of which were fitted with speedos - never had maximum permitted speed plates in their cabs.

 

[Pyewipecarshed]

No driver I've ever known has had to have an 'aide memoir' to remind them of the maximum speed of the train they are driving. Furthermore, if a driver is working a multiple unit formation where the leading unit is capable of 100mph and the rear unit can only do 75, it's probably best to ignore the 100mph sign above your head.

I suspect the in-cab maximum speed sign has rather more relevance during conducting activity where a conductor is provided who doesn't sign the traction but knows the route.

I doubt any driver would ever admit to using the cab sticker to remind themselves! It's one of those things where if it wasn't provided and there was a speeding incident it would be flagged up that there was no visual reminder... hence one is provided.
As for differing speeds there was a case where a 142 (75 mph) cleared 100mph when coupled to the rear of a particularly fast 158 (official maximum 90mph) because the driver forgot it was there!!