| British Rail Class 127 | |
|---|---|
 BR (Derby) Class 127 4-car Suburban dmu Nos.M51592 (Class 127), M59597 (186), M59640 (186), M51644 (Class 127) in Rail Blue with all-yellow front ends gently rumbling away at St Pancras before departing for Bedford (Midland Rd), 07/75. | |
| In service | 1959–1993 |
| Manufacturer | BR Derby |
| Built at | Derby |
| Family name | First generation |
| Replaced | Steam locomotives and carriages |
| Constructed | 1958–1959 |
| Number built | 30 sets (120 vehicles) |
| Number preserved | 3 sets (8 vehicles) |
| Number scrapped | 27 sets (112 vehicles) |
| Successor | Class 317 |
| Formation | 4-cars sets: DMBS + TSL + TS + DMBS |
| Fleet numbers | 51591–51650 (DMBS) 59589–59618 (TSL) 59619–59648 (TS) |
| Capacity |
|
| Operators | British Rail |
| Specifications | |
| Car length | 64 ft 0 in (19.51 m) |
| Width | 9 ft 3 in (2.82 m) |
| Height | 12 ft 4+1⁄2 in (3.772 m) |
| Maximum speed | 70 mph (113 km/h) |
| Weight |
|
| Prime mover(s) | Rolls-Royce C8NFLH, 2 per power car |
| Power output | 476 hp (355 kW) per power car |
| Transmission | Hydraulic |
| Multiple working | ■ Originally Blue Square but later changed to ▲Red Triangle |
| Track gauge | 4 ft 8+1⁄2 in (1,435 mm) |
The British Rail Class 127 diesel multiple units were built by BR Derby in 1959. Thirty 4-car units were built, formed of two outer driving motor vehicles, sandwiching two intermediate trailers which were classified class 186.[citation needed] The technical description of such as 4-car unit was DMBS + TSL + TS + DMBS.