NZR DF class (1954)

New Zealand DF class (English Electric)
English Electric DF 1501 on display outside Sims-PMI in Otahuhu, Auckland. The locomotive has since moved to the Diesel Traction Group, Ferrymead Historic Park.
Type and origin Power type Diesel-electric Builder English Electric, United Kingdom Build date 1954
Specifications Configuration: ​  • AAR 2C-C2  • UIC (2′Co)(Co2′)  • Commonwealth 2Co-Co2 Gauge 3 ft 6 in (1,067 mm) Wheel diameter 3 ft 1 in (0.940 m) Minimum curve 297 ft (90.526 m) Wheelbase 52 ft 0 in (15.850 m) total, 12 ft 0 in (3.658 m) rigid Length 58 ft 0 in (17.678 m) over headstocks Width 8 ft 4 in (2.540 m) Height 11 ft 6 in (3.505 m) Axle load 11+3⁄4 long tons (11.9 t; 13.2 short tons) Adhesive weight 69 long tons (70 t) Loco weight 105 long tons (107 t; 118 short tons) Fuel type Diesel Fuel capacity 600 imp gal (2,700 L) Prime mover English Electric 12SVT Mk 2 RPM range 750 - 850 rpm Engine type four stroke, four valves per cylinder Aspiration Turbocharged Generator English Electric 828A Traction motors Six English Electric 525/2A Cylinders 12 vee Cylinder size 10 in × 12 in (254 mm × 305 mm) MU working 110V, 10 notch electro-magnetic control Loco brake air, dynamic Train brakes air
Performance figures Maximum speed 60 mph (97 km/h) Power output 1,500 hp (1,100 kW) gross, 1,370 hp (1,020 kW) net Tractive effort 38,500 lbf (171.3 kN) at 25% adhesion starting, 27,700 lbf (123.2 kN) at 16 mph (30 km/h) continuous
Career Number in class 10 Numbers 1500 - 1509 (1954 to 1965) 1300 - 1309 (1965 to 1975) Locale North Island First run July 1954 Last run 21 June 1975 Disposition 9 scrapped 1 preserved

The New Zealand D^F class locomotive of 1954 was the first class of mainline diesel-electric locomotives built for New Zealand's national railway network,^[1] built by English Electric. It should not be confused with General Motors Electro-Motive Division DF class of 1979.