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Clayton DHP1
Type and origin
Power type
Diesel-hydraulic
Builder
Clayton Equipment Company
Build date
1962-1963
Specifications
Configuration:
• UIC
B'B'
• Commonwealth
B-B
Gauge
4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter
3 ft 3+1⁄2 in (1.003 m)
Minimum curve
4 chains (260 ft; 80 m)
Wheelbase
34 ft 0 in (10.36 m)
Length
46 ft 3+1⁄2 in (14.11 m)
Width
9 ft 0 in (2.74 m)
Height
12 ft 6 in (3.81 m)
Loco weight
56 long tons (57 t; 63 short tons)
Fuel capacity
600 imp gal (2,700 L; 720 US gal)
Prime mover
Rolls-Royce C8TFL, 4 off
Transmission
Hydraulic
MU working
Not fitted
Train heating
Steam
Train brakes
Vacuum
Performance figures
Maximum speed
90 mph (140 km/h)
Power output
Engines: 375 hp (280 kW) at 1,800 rpm × 4 At rail: 1,200 hp (890 kW)
Tractive effort
Maximum: 37,500 lbf (167 kN)
Career
Operators
British Railways
Disposition
Scrapped
DHP1, meaning Diesel Hydraulic Prototype number 1, was a prototype Type 3 mainline diesel locomotive built between 1962 and 1963 by Clayton to demonstrate their wares to British Railways. It was designed for mixed traffic work, being equipped with steam heating facilities for working passenger trains. It was painted red, with the cab area above bonnet-level height painted cream.
Visually similar to their Class 17 Type 1 product, though longer, and with the radiator grilles in the ends of the engine covers rather than the sides. The locomotive saw little service, mainly around the International Combustion works in Derby. The locomotive was broken up by Clayton's in April 1967.
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