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