| British Rail Class 117 | |
|---|---|
 A Class 117 at Didcot Parkway, 1989 | |
 Interior of a Class 117. | |
| In service | 1959–2000; one unit used in departmental use until 2015 |
| Manufacturer | Pressed Steel Company |
| Family name | First generation |
| Replaced | Steam locomotives and carriages |
| Constructed | 1959–1961 |
| Number built | 123 cars (42 DMBS, 42 DMS, 39 TCL) |
| Number preserved | 35 cars (17 DMBS, 16 DMS, 23 TCL) |
| Number scrapped | 88 cars (25 DMBS, 26 DMS, 16 TCL) |
| Formation | DMBS-TCL-DMS |
| Operators | British Rail ScotRail Silverlink |
| Lines served | Western Region London Midland region Scottish region |
| Specifications | |
| Car body construction | Steel |
| Car length | 64 ft 0 in (19.51 m) |
| Width | 9 ft 3 in (2.82 m) |
| Height | 12 ft 8+1⁄2 in (3.87 m) |
| Doors | Slam |
| Articulated sections | Single car (2) |
| Maximum speed | 70 mph (113 km/h) |
| Weight | Power cars: 36 long tons 0 cwt (80,600 lb or 36.6 t), Trailer cars: 30 long tons 0 cwt (67,200 lb or 30.5 t) |
| Prime mover(s) | BUT (AEC) then BUT (Leyland), of 150 hp (110 kW), (both types), two per power car |
| Power output | 600 hp (450 kW) per 3-car set |
| Transmission | Mechanical |
| HVAC | Oil burning air heater |
| Braking system(s) | Vacuum |
| Safety system(s) | AWS |
| Coupling system | Screw |
| Multiple working | ■ Blue Square |
| Track gauge | 4 ft 8+1⁄2 in (1,435 mm) |
The British Rail Class 117 diesel multiple units (DMUs) were built by Pressed Steel from 1959 to 1961. It was a licence-built variant of the British Rail Class 116.[1]