Push Pull Control Systems

Big Al · 22 янв 2016

8126 сказал(а): ↑

For a more French take on things, I've just remembered the mighty Nord/SNCF 2-141TC 2-8-2T class, used on freight work and the Paris Gare du Nord suburban services. They had a variant on the Nord 'Super Pacific' narrow firebox boiler, so think something halfway between a GWR 4700 and a 9F (only with more tractive effort than either) in tank engine form running fast push pull suburban services up to 1970. I don't know anything about the system employed, although they have quite obvious auto couplers, but I'd guess compressed air again, given the use of the Westinghouse brake on the continent.

Here they are in action in 1969. Wonderful beasts. There's one preserved, but it's stored outside and I've not seen anything to suggest it's ever run in preservation.
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They were a wonderful example of how to run intensive services in and out of a busy terminus. Spent a weekend in 1968 travelling behind them with loads of up to 8 coaches to Persan Beaumont and elsewhere.Also went out of Paris Bastille to Boissy St Leger with the 141TBs -around 15 different locos in all and always within a minute of booked time.

Johnb · 22 янв 2016

DisusedBranch сказал(а): ↑

What a wonderful change to have a thread where I have genuinely learned something interesting, as opposed to how easy it is to set up a Fudbook page / dream of reopening a railway and how good railway enthusiasts are at disagreeing with each other!
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Agree with this I too have learnt a lot but one small thing I do want to know and it is not directly related to control systems. Why did the GWR and later the WR use the light engine headlamp code on their auto trains. The only exception to this I have found is the Exeter -Dulverton service where a ll the pictures ive seen its the normal Class B headlamp.

Jimc · 22 янв 2016

Johnb сказал(а): ↑

Agree with this I too have learnt a lot but one small thing I do want to know and it is not directly related to control systems. Why did the GWR and later the WR use the light engine headlamp code on their auto trains. The only exception to this I have found is the Exeter -Dulverton service where a ll the pictures ive seen its the normal Class B headlamp.
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This came up on the GWR E list very recently:
https://groups.yahoo.com/neo/groups/gwr-elist/conversations/messages/65540

You will see a lot of pictures of locos. with the lamp in the centre of the buffer beam working on branch lines – it was an official dispensation from the normal ‘B’ headcode position for branch lines.

Peter Jordan
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Push Pull Control Systems

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