1972 Mk2 stock on the Jubilee

[wanstead]

Does anyone have the exact dates of the last 1972 stock workings on the Jubilee Line? I'd imagine it may be around 1988 depending on when the Mk2 batch of 1983 stock was delivered, but did any hang on into 1989 or maybe even 1990 while teething trouble was ironed out on the new stock (or, knowing the 1983 stock, worked around as best as can be  )

From the few videos of 1983 stock operations I've seen on YouTube they don't fill the platforms entirely, being six-car trains. Were there any operational difficulties when the 1983 stock shared duties with the longer 1972 stock trains?

[Dstock7080]

March 1989
The last two trains were transferred from Neasden to Stonebridge Park on 17th and 23rd.

[Tom]

You beat me to it!

The info I have is 17.03.89 - units 3263 and 3551, which displaced 1959 stock units 1232 and 1055 to the Northern on 23.03.89.

[spsmiler]

Sept 19, 2023 16:53:43 GMT wanstead said:

From the few videos of 1983 stock operations I've seen on YouTube they don't fill the platforms entirely, being six-car trains. Were there any operational difficulties when the 1983 stock shared duties with the longer 1972 stock trains?

The 1996ts trains were also 6-car when first introduced but all platform works were for longer 7 car trains as it was always planned to add an extra car to each train.

With hindsight, 8 car trains may have been better, but I'm not sure if the 1939 platforms are long enough for 8 car trains. 

[Tom]

Sept 19, 2023 16:53:43 GMT wanstead said:

From the few videos of 1983 stock operations I've seen on YouTube they don't fill the platforms entirely, being six-car trains. Were there any operational difficulties when the 1983 stock shared duties with the longer 1972 stock trains?

The difference was around seven metres (1983 Stock 106m versus 1972 stock at 113m). The line would have been designed for the longer stock (if not eight car trains), without the plethora of platform furniture and barriers that we are used to today and until 1988 both stocks were crew operated, though with the guard in the saloon on 1972 stock and in the rear cab in 1983 stock. I doubt there would have been many difficulties as the stopping positions would have been provided for the longer trains.

[metman]

Sept 19, 2023 19:12:16 GMT spsmiler said:

Sept 19, 2023 16:53:43 GMT wanstead said:

The 1996ts trains were also 6-car when first introduced but all platform works were for longer 7 car trains as it was always planned to add an extra car to each train.

With hindsight, 8 car trains may have been better, but I'm not sure if the 1939 platforms are long enough for 8 car trains. 

I believe the 1930s extension platforms were designed to accommodate 8 car trains. Of course those were 8 cars of pre-1938/1938 stock not the longer 1996 stock used today.

[t697]

Those old 8 car trains were around 128 - 130m long. The current 7 car 96TS with longer individual cars is about 126m long. Not too difficult to fit in older 8 car trains crew operated, with the driver's cab possibly at the extreme end of the platform and the Guard's position at the non-cab end of the last car. If one looks at end barrier positions today there is usually space to imagine repositioning them for such a train or having the headwall/tailwall provide that function.

[t697]

Sept 19, 2023 16:53:43 GMT wanstead said:

From the few videos of 1983 stock operations I've seen on YouTube they don't fill the platforms entirely, being six-car trains. Were there any operational difficulties when the 1983 stock shared duties with the longer 1972 stock trains?

At that time there wasn't so much concern about end barriers having to meet the end of correctly berthed trains.

In any case a similar condition arises at all stations from Great Portland Street to Aldgate where there are platforms used by both S8 (Met) and S7 (Circle and H&C) trains and that is still tolerated!