The South African Railways Class 33-400 of 1968 was a South African and Namibian diesel-electric locomotive.
Quick Facts South African Class 33-400 TransNamib Class 33, Type and origin ...
South African Class 33-400 TransNamib Class 33 |
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Rebuilt TransNamib no. 504, ex no. 33-475, near Keetmanshoop, 2 September 2004 |
Type and origin |
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Power type | Diesel-electric |
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Designer | General Electric |
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Builder | SA GE-DL Locomotive Group |
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Serial number | 36530-36644 |
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Model | GE U20C |
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Build date | 1968-1970 |
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Total produced | 115 |
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Specifications |
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Configuration:
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• AAR | C-C |
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• UIC | Co'Co' |
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• Commonwealth | Co+Co |
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Gauge | 3 ft 6 in (1,067 mm) Cape gauge |
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Wheel diameter | 915 mm (36.0 in) |
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Wheelbase | 12,243 mm (40 ft 2.0 in) |
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• Axle spacing (Asymmetrical) | 1-2: 1,594 mm (5 ft 2.8 in) 2-3: 1,911 mm (6 ft 3.2 in) |
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• Bogie | 3,505 mm (11 ft 6.0 in) |
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Pivot centres | 9,017 mm (29 ft 7.0 in) |
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Length:
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• Over couplers | 16,866 mm (55 ft 4.0 in) |
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Width | 2,756 mm (9 ft 0.5 in) |
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Height | 3,931 mm (12 ft 10.8 in) |
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Axle load | 15,749 kg (34,721 lb) |
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Adhesive weight | 94,494 kg (208,324 lb) |
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Loco weight | 94,494 kg (208,324 lb) max |
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Fuel type | Diesel |
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Fuel capacity | 3,600 litres (790 imp gal) |
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Prime mover | GE 7FDL-12 |
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RPM range | 400-1,000 |
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• RPM idle | 400 |
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• Maximum RPM | 1,000 |
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Engine type | 4 stroke diesel |
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Aspiration | Elliott H-584 turbocharger |
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Generator | DC 10 pole GE 5GT-581C9 |
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Traction motors | Six GE 5GE-761A6 DC 4 pole |
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• Rating 1 hour | 635A |
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• Continuous | 620A @ 20 km/h (12 mph) |
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Cylinders | V12 |
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Gear ratio | 92:19 |
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MU working | 6 maximum |
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Loco brake | 28L-AV-1 with vigilance control |
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Train brakes | Westinghouse 6CDX4UC compressor/exhauster |
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Air tank cap. | 825 litres (181 imp gal) |
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Compressor | 0.029 m3/s (1.0 cu ft/s) |
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Exhauster | 0.116 m3/s (4.1 cu ft/s) |
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Couplers | AAR knuckle (SASKOP DS) |
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Performance figures |
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Maximum speed | 100 km/h (62 mph) |
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Power output:
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• Starting | 1,605 kW (2,152 hp) |
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• Continuous | 1,490 kW (2,000 hp) |
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Tractive effort:
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• Starting | 223 kN (50,000 lbf) @ 25% adhesion |
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• Continuous | 178 kN (40,000 lbf) @ 24 km/h (15 mph) |
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Factor of adh.:
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• Starting | 25% |
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• Continuous | 20% |
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Brakeforce | 70% ratio @ 345 kPa (50.0 psi) |
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Dynamic brake peak effort | 173 kN (39,000 lbf) @ 26 km/h (16 mph) |
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Close
Between 1968 and 1970, the South African Railways placed 115 Class 33-400 General Electric type U20C diesel-electric locomotives in service. Many of them were transferred to TransNamib, the Namibian Railways, upon South West Africa’s independence on 21 March 1990.[1]