British Rail DP2

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English Electric DP2
DP2 at Kings Cross, 1963
Power type Diesel-electric
Builder English Electric at Vulcan Foundry
Serial number English Electric: 3205
Vulcan Foundry: D733
Build date 1962
UIC classification Co'Co'
Gauge ft 8+12 in (1,435 mm)
Wheel diameter 3 ft 7 in (1.09 m)
Wheelbase 58 ft 6 in (17.83 m)
Length 69 ft 6 in (21.18 m)
Width 8 ft 9 in (2.67 m)
Height 12 ft 10 in (3.91 m)
Locomotive weight 105 long tons (107 t)
Fuel capacity 900 imp gal (4,100 l; 1,100 US gal)
Prime mover EE 16CSVT
Traction motors EE, 6 off
Transmission Diesel Electric
Top speed 90 mph (144.8 km/h)
Power output 2,700 hp (2,000 kW)
Tractive effort 50,000 lbf (222.41 kN)
Train heating Clayton Mk.1 steam generator
ETH
Career British Railways
Power class Type 4
Number DP2
Axle load class Route Availability: 6
Disposition Wrecked July 1967, withdrawn September 1967, scrapped

DP2, meaning Diesel Prototype number 2, was a prototype Type 4 mainline diesel locomotive built in 1962 by English Electric at their Vulcan Foundry in Newton-le-Willows to demonstrate its wares to British Railways. As the Deltics were then in production, it was decided to produce the locomotive on the same production line; the bodyshell used for DP2 reputedly being the eighteenth made. While DP2 looked like a Class 55 locomotive in outline, there were many detail differences; particularly the large bodyside radiator vents at one end, and the single roof fan as opposed to the four symmetrically placed fans on the Deltics. These differences were the external effect of DP2 being totally different from the twin-engined Deltics internally, being the forerunner of the Class 50.