British Rail Class 01

British Rail's Class 01 diesel locomotives were a short wheelbase 0-4-0 diesel-mechanical design intended for use in areas with tight curves and limited clearance.

British Rail Class 01
Type and origin Power type Diesel-mechanical Builder Andrew Barclay Sons & Co. Serial number 395–398, 424 Build date 1956 (4), 1958 (1) Total produced 5
Specifications Configuration: ​  • Whyte 0-4-0  • UIC B Gauge 4 ft 8 1⁄2 in (1,435 mm) Wheel diameter 3 ft 2 in (0.965 m) Minimum curve 1.06 chains (21 m) Wheelbase 6 ft 0 in (1.83 m) Length 23 ft 8 in (7.21 m) Width 8 ft 5+1⁄2 in (2.578 m) Height 11 ft 10+1⁄2 in (3.620 m) Loco weight 25 long tons (25 t) Fuel capacity 325 imp gal (1,480 L; 390 US gal) Prime mover Gardner 6L3 RPM range 1,200 (max) Engine type Four-stroke diesel Transmission Mechanical: Wilson SE4, 4-speed epicyclic gear box, Vulcan-Sinclair type 23 rigid hydraulic coupling, to a Wiseman 15LGB reverse and final drive unit. Loco brake Straight Air Train brakes 11503–11506: none 18: Vaucuum
Performance figures Top speed 14.5 mph (23.3 km/h) Power output Engine: 153 hp (114 kW) At rail: 102 hp (76 kW) Tractive effort 12,750 lbf (56.7 kN) (max) Brakeforce 15 long tons-force (150 kN)
Career Railroad(s) British Railways Number 11503–11506, 81 (departmental); later D2953–D2956; later 01001–01002 Axle load class RA 1 Retired 1966–1981