British Rail DP1
DP1, or Prototype Deltic is a demonstrator locomotive built by English Electric in 1955. This locomotive resulted in 22 similar locomotives being ordered by British Rail, which became their Class 55.
English Electric DELTIC prototype | |
The nose end of DP1 at Locomotion | |
Power type | Diesel-electric |
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Builder | English Electric at Dick, Kerr Works, Preston |
Serial number | EE: 2003 |
Build date | 1955 |
UIC classification | Co'Co' |
Gauge | Lua error in package.lua at line 80: module 'Module:Track gauge/data' not found. |
Wheel diameter | 3 ft 7 in (1.09 m) |
Length | 66 ft |
Locomotive weight | 106 long tons (108 t) |
Prime mover | Napier Deltic D18-25 (2 off) |
Traction motors | EE 526/A, 6 off |
Cylinders | 18 × 2 |
Transmission | Diesel Electric |
Top speed | 90 mph (140 km/h) 106 mph (171 km/h) from 1956 |
Power output | 3,300 hp (2,500 kW) |
Tractive effort | 90 mph gearing: 60,000 lbf (266.89 kN) 106 mph gearing: 52,500 lbf (233.53 kN) |
Train heating | Stone-Vapor/Clarkson steam generator |
Career | British Railways |
Power class | Type 5 |
Number | DP1 |
Official name | DELTIC |
Retired | March 1961 |
Disposition | to Science Museum, London, April 1963 |