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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.

This article does not cite any sources. (December 2009)

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 1800 rpm × 4 At rail: 1,200 hp (890 kW) Tractive effort Maximum: 37,500 lbf (167 kN)
Career Operators British Railways Disposition Scrapped

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.

External links

• Photo in International Combustion works in 1964
• DHP1 - The Railway Centre.Com

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