Dual heat Mk1s

[Bomag]

I am doing some research work for my coach database and was looking to find out which late Mk1 lots were fitted, with, or for, ETH from new.  The last Lot (BCKs) were delivered as  electric only to the Southern but the Parkin book implies that most of the lots after 1961 were built as dual heated. However, from various Platform 5 books many Eastern and Western late Mk1s are shown as team heat only, whereas others are shown as ETH isolated.

 

Does anybody please have a list of which lots were dual heat?

Edited April 6, 2020 by Bomag

[balders]

A quick check of the 78' RCTS stock book confirms what I thought that certainly lots 30720 and 30726 SK's 26060-26217 inclusive built at Derby 1962/3 were steam heat and remained so until the end. Allocated chiefly between Western Eastern and Scotland. They were culled starting from the early 80s but a few lasted longer. 

 

Regarding new build as dual heat from 61' they appear to be;

TSO - 4900-17 lot 30646 Wolverton 1961

4918 - 5044 lot 30690 Wolverton 1961-2

5045 - 5069 lot 30724 at York 1963.

 

SK's built as dual heat appear to be;

25704 - 25905 lot 30685 Derby 1961-62

25906 - 25972 lot 30686 Derby 1962 were a combination of electric heat for the Southern and dual heat for the Midland but I don't know if the Southern ones had their steam heat isolated rather than not fitted at all.

 

25973 - 26023 of lot 30719 Derby 1962 for Midland region with the remainder to 26059 being steam heat for the ER. 

 

BSK's built dual heat;

35447 - 35449 lot 30728 Wolverton 1963

35450 - 35486 lot 30721 Wolverton 1963. 

 

Probably nowhere near comprehensive but what is to hand. Any errors are mine. Hope this gives you a steer. 

 

Regards

 

Guy

 

 

Edited April 7, 2020 by balders
Addition

[DY444]

On 06/04/2020 at 19:05, Bomag said:

I am doing some research work for my coach database and was looking to find out which late Mk1 lots were fitted, with, or for, ETH from new.  The last Lot (BCKs) were delivered as  electric only to the Southern but the Parkin book implies that most of the lots after 1961 were built as dual heated. However, from various Platform 5 books many Eastern and Western late Mk1s are shown as team heat only, whereas others are shown as ETH isolated.

 

Does anybody please have a list of which lots were dual heat?

 

I have a vague recollection that somewhere in Parkin it says that from a certain point all Mk1s were built with the internal wiring and equipment for eth but not all had the end of coach jumpers and sockets.  They were thus SH only from an operational perspective but could be relatively easily converted to DH. 

[caradoc]

That makes sense, given that when the last Mark 1s were being built the only ETH fitted locos BR had were the AC electrics and the Southern's loco fleet.

 

[Bomag]

2 hours ago, DY444 said:

 

I have a vague recollection that somewhere in Parkin it says that from a certain point all Mk1s were built with the internal wiring and equipment for eth but not all had the end of coach jumpers and sockets.  They were thus SH only from an operational perspective but could be relatively easily converted to DH. 

 

Thanks, as I mentioned in my OP Parkin says most of the lots after 1961 were fitted for dual heat, not all. In the supplement it only lists 30647, 30648, 30667, 30668 and 30669 as the starting point. The problem with Platform 5 etc is that only on some lots e.g. 30685 - 25704 to 25909 does it say ETH isolated for the ER, whereas others  lot 30720 - 26060 to 26137 say dual heat LMR delivered coaches and steam only to ER delivered coaches. It may be that the jumpers are still on for lot 30685 but not fitted for 30720 ER?

[jim.snowdon]

1 hour ago, caradoc said:

That makes sense, given that when the last Mark 1s were being built the only ETH fitted locos BR had were the AC electrics and the Southern's loco fleet.

 

BR would have been well aware from about 1957 that the LMR was going to have a substantial number of services that would have to use ETH  fitted stock given that the coming electric locomotives were not being provided with steam heating boilers. 

A second factor to consider is which Lots were ordered as steam heat only but subsequently altered before construction by means of Works Orders and similar devices that were recorded separately.

 

Jim

[45125]

Many of the ER dual heat ones when built just had the jumpers removed and no fuses fitted. The jumpers gradually appeared but the fuses were not fitted.