The Central line's 62TS RAT and related questions.

[joeltancl]

Pardon me if these have been answered elsewhere already - mods, if they have, please point me to the correct thread and close this one.



I have seen videos and photographs of the Central line's 1962 Stock Rail Adhesion Train (RAT). When they were in frontline passenger service, the '59/'62 Stock had speedometers marked in mph. However, I am under the impression from other threads that the current Central line signalling system works using speeds calculated in km/h.



I have two questions.

1. What is the current situation regarding the RAT? Does the present-day RAT's speedometer have the ability to show speeds in km/h?



2. Are speed restrictions (not signalling-related) on the line also set in km/h?



Thank you.

[Tom]

It's been a while since I've been on one of the 1962 stock RATs, but my memory is that as part of the fitment of Central Line ATP equipment they do have the same speedometers as 1992 stock, with a dual display for Target Speed and Actual Speed, both marked in km/h. What I can't remember (as it's been a few years) is if the old dial speedometer, calibrated in mph, was still fitted or not.

All speed restrictions on the line are in km/h, and these are all imposed by the signalling system, even temporary ones.

[joeltancl]

Hmm, I wonder how they got the speedometer to work.

Another thing: How does the current signalling system interface with the RAT? If (touch wood) there were to be an incident of passing a signal at danger or unauthorised movement beyond a block marker board, how are the brakes activated? Will it cause an emergency stop, as per a similar rule on tripcock lines?

My guess (although it may be wrong) is that it works in some ways similar to the system used on the former 67TS - the ATP contraption somehow would dump the train line air...

[metman]

I’m no expert but I understand the air line is controlled by the ATP system in a similar way as it was when the tripcock was the main safety device.

[Tom]

That’s my understanding too, there is a trip valve which is energised by the ATP controller, and will exhaust the train line to atmosphere if de-energised.

[joeltancl]

Thanks for the reply. It seems my guess was not too far off...

[fish7373]

need to try again fish7373[Dstock7080]

[xtmw]

bump.... Doesn't it just have a 'Actual Speed' And 'Target Speed' just like the 92?

[Tom]

Yes, it does. From memory it's exactly the same display just mounted differently.

[xtmw]

I believe it's at the top of the cab or to the side... Can't remember.

Mod edit [Antharro]: Quote removed. Please be selective about the part of a post you wish to quote rather than the whole post verbatim, particularly if you are replying to the previous post in the thread.

[spsmiler]

I thought I might add a short film to this thread - of course its on topic - I hope this is OK

1962 RAT train calls at Roding Valley - I get to peek inside part of the train.

I found it better to film the hoppers from a short distance away, rather than standing right next to the train's windows.

The leaf fall sequence was filmed from a bridge near to Newbury Park station ... it was totally unexpected (but much welcomed)

[brigham]

Must be the best-presented departmental stock ever seen.
I hope that plans are already in existence to recover a heritage 1960s-era train from this rake when its autumn days are done.