This article is about 1990s-era locomotives used by DB Cargo France and Eurotunnel. For diesel locomotives built 1958-1960, see
British Rail Class 21 (NBL).
The second use of the TOPS classification Class 21 for locomotives used on the British railway network came through the use of a number of related diesel-hydraulic and diesel-electric locomotives procured following the opening of the Channel Tunnel. The total of 16 locomotives were obtained by two separate operators, with some used for freight, and others to propel service trains and as "Thunderbird" locomotives.
Quick Facts Type and origin, Power type ...
British Rail Class 21 (MaK) |
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NS 6450 in 2009 - this locomotive was subsequently procured by Eurotunnel [1] |
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Specifications |
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Configuration:
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• UIC | Bo'Bo' |
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Gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
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Wheel diameter | 1,000 mm (39.37 in) |
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Length | 14.7 m (48 ft 2+3⁄4 in) (21/5) 14.09 m (46 ft 2+3⁄4 in) (21/6) 14.4 m (47 ft 2+7⁄8 in) (21/9) |
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Width | 3.3 m (10 ft 9+7⁄8 in) |
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Height | 4.8 m (15 ft 9 in) |
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Loco weight | 87 t (86 long tons) (21/5) 80 t (79 long tons) (21/6) 90 t (89 long tons) (21/9) |
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Prime mover | CAT 3512 B DITA-SC (21/5) MTU 8V 4000R41L (21/6) MTU 12V 396TC13 (21/9) |
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Transmission | Hydraulic / L5r4szeU2 by Voith Diesel electric / three phase electrical by ABB Group |
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Train heating | None |
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Loco brake | Air disc (21/5 and/6) Air (21/9) |
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Performance figures |
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Maximum speed | 100 km/h (62 mph) |
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Power output | 1,570 kW (2,110 hp) (21/5) 1,100 kW (1,500 hp) (21/6) 950 kW (1,270 hp) (21/9) |
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