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| British Rail Class 123 | |
| A mixed four car diesel-mechanical multiple unit formed from a class 123 driving motor corridor second, 2 class 124 trailer brake corridor seconds, and a class 123 driving motor corridor second number at Manchester Piccadilly on 10 March 1984. A mixed four car diesel-mechanical multiple unit formed from a class 123 driving motor corridor second, 2 class 124 trailer brake corridor seconds, and a class 123 driving motor corridor second number at Manchester Piccadilly on 10 March 1984. | |
| In service | 1963–1984 |
|---|---|
| Manufacturer | Swindon Works |
| Number built | 40 (Ten 4-car units) |
| Number scrapped | All |
| Formation | DMBSL-TCK-TSL[RB]-DMSK |
| Capacity | 24 First class, 176 Second class seats (units with buffet 32 second class less) |
| Operator | British Rail |
| Specifications | |
| Car length | Category:Aldwych Branch The Short Streach Of Line Between Holborn And Aldwych Was Closed In 1994.The Line Was Due To be extended to Waterloo but never was.There will be a bit of Aldwych In My Website when added |
| Width | Category:Aldwych Branch The Short Streach Of Line Between Holborn And Aldwych Was Closed In 1994.The Line Was Due To be extended to Waterloo but never was.There will be a bit of Aldwych In My Website when added |
| Height | Category:Aldwych Branch The Short Streach Of Line Between Holborn And Aldwych Was Closed In 1994.The Line Was Due To be extended to Waterloo but never was.There will be a bit of Aldwych In My Website when added |
| Maximum speed | 70 mph (Template:Convert/outsep) |
| Weight | Template:Convert/LT |
| Engine(s) | Template:Convert/hp, 2 per power car |
| Power output | Template:Convert/hp |
| Bogies | B4 |
| Multiple working | Blue Square |
| Gauge | {{#switch:ussg
|3mm=3 mm (0.118 in) |4mm=4 mm (0.157 in) |4.5mm=4.5 mm (0.177 in) |4.8mm=4.8 mm (0.189 in) |6.5mm=6.5 mm (0.256 in) |6.53mm=6.53 mm (0.257 in) |8mm=8 mm (0.315 in) |8.97mm=8.97 mm (0.353 in) |9mm=9 mm (0.354 in) |9.42mm=9.42 mm (0.371 in) |10.5mm=10.5 mm (0.413 in) |11.94mm=11.94 mm (0.470 in) |12mm=12 mm (0.472 in) |12.7mm=12.7 mm (0.5 in) |13mm=13 mm (0.512 in) |13.5mm=13.5 mm (0.531 in) |14mm=14 mm (0.551 in) |14.125mm=14.125 mm (0.556 in) |14.2mm=14.2 mm (0.559 in) |14.28mm=14.28 mm (0.562 in) |14.3mm=14.3 mm (0.563 in)|15.76mm=15.76 mm (0.620 in) |
The Class 123 was a design of Diesel Multiple Unit built for British Rail in 1963. They were built by British Rail at Swindon Works, and designed like all Swindon units as inter-city sets. Ten of the four-car sets were built and introduced in 1963. The units bear a visible similarity to the British Rail Class 309; however, there is no 'relation' here as the two types were built by different manufacturers for different markets.
Swindon-built DMUs, including the Class 123 and 124, had a structure and internal construction with much more in common with BR coaching stock (British Rail Mark 1) than they do with many DMU classes. The carriage underframes were longer (Mk1 standard main-line Category:Aldwych Branch The Short Streach Of Line Between Holborn And Aldwych Was Closed In 1994.The Line Was Due To be extended to Waterloo but never was.There will be a bit of Aldwych In My Website when added frames, vs the Category:Aldwych Branch The Short Streach Of Line Between Holborn And Aldwych Was Closed In 1994.The Line Was Due To be extended to Waterloo but never was.There will be a bit of Aldwych In My Website when added frames common to most 1st generation DMUs) and the units were provided with Mk1-style "Pullman" gangways instead of the "British Standard Gangways" fitted to most contemporary DMUs of the period. It was also unusual for a first-generation DMU to sport a front end gangway. None of these units survive today.
| Lot No. | Type | Diagram | Qty | Fleet numbers | Notes |
|---|---|---|---|---|---|
| 30703 | Driving Motor Brake Open Second (DMBSL) | 566 | 10 | 52086–52095 | 32 seats, 2 lavatories |
| 30704 | Driving Motor Corridor Second (DMSK) | 574 | 10 | 52096–52105 | 7 compartments (56 seats), 2 lavatories |
| 30705 | Trailer Corridor Composite (TCK) | 567 | 10 | 59818–59827 | 4 first class and 3 second class compartments: 24 & 24 seats; 2 lavatories |
| 30706 | Trailer Open Second with lavatory (TSL) | 568 | 5 | 59235–59239 | 64 seats, 2 lavatories |
| 30707 | Trailer Buffet Second (TSLRB) | 569 | 5 | 59828–59832 | 32 seats, 8 seats in buffet area, 1 staff lavatory |
Further Use[]
One of the buffet cars, 59831 was rebuilt as a Class 309 AC EMU griddle car, and renumbered 69108. It replaced a griddle car that had developed an underframe fault
References[]
- Motive Power Recognition: 3 DMUs. Colin J. Marsden
- British Rail Fleet Survey 8: Diesel Multiple Units- The First Generation. Brian Haresnape
Further reading[]
- Template:Cite magazine
External links[]
Template:British Rail DMU
Template:Diesel-loco-stub