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| British Rail Class 122 Bubble Car | |
|---|---|
 Class 122, no. 55006, at Bewdley on the Severn Valley Railway on 15 October 2004, whilst taking part in the Railcar 50 event. This unit is painted in the second version of BR Green livery, and is preserved on the Ecclesbourne Valley Railway. | |
 Interior of W55000 on the South Devon Railway | |
| In service | 1958–1995 |
| Manufacturer | Gloucester RC&W |
| Family name | First generation |
| Replaced | Steam locomotives and carriages |
| Number built | 20 motor, 9 trailer |
| Number preserved | DMBS: 8 |
| Formation | Single car |
| Diagram |
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| Fleet numbers |
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| Capacity |
|
| Operators | British Rail |
| Depots | |
| Lines served | |
| Specifications | |
| Car body construction | Steel |
| Car length | 64 ft 0+1⁄2 in (19.52 m) |
| Width | 9 ft 3 in (2.82 m) |
| Height | 12 ft 8+1⁄8 in (3.86 m) |
| Doors | Slam |
| Articulated sections | Single car (2) |
| Maximum speed | 70 mph (113 km/h) |
| Weight |
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| Prime mover(s) | Two BUT (AEC) then BUT (Leyland) of 150 hp (110 kW) (both types) |
| Power output | 300 hp (220 kW) |
| Transmission | Standard mechanical |
| Safety system(s) | AWS |
| Multiple working | ■ Blue Square |
| Track gauge | 4 ft 8+1⁄2 in (1,435 mm) |
The British Rail Class 122 diesel mechanical multiple units were built by Gloucester RC&W in 1958. Twenty single-car, double-ended driving motor vehicles, nicknamed "Bubble Cars", were built, numbered 55000–55019. These were supplemented by nine single-ended trailer vehicles, numbered 56291–56299[9] (some of which were later renumbered into the 54291–54299 block).
- ^ British Rail Locoshed book. Ian Allan. 1981. p. 50. ISBN 0-7110-1112-5.
- ^ a b c Hemming 1978, p. 12.
- ^ British Rail Locoshed book. Ian Allan. 1979. p. 48. ISBN 0-7110-0931-7.
- ^ Mitchell 1994, p. 25.
- ^ Heginbotham, Stephen (2010). Cornwall's Railways Remembered. Halsgrove. pp. 51–52. ISBN 978-0-85704-005-3.
- ^ Mitchell 1994, p. 33.
- ^ Mitchell 1994, p. 89.
- ^ Mitchell 1994, p. 136.
- ^ Butcher, Roger (November 1993). Departmental Coaching Stock (5th ed.). Southampton: South Coast Transport Publishing. pp. 60, 75. ISBN 1-872768-10-5.