Background and Design
In the mid 1960s British rail produced specifications for type 5 locomotives weighing less than 126t with more than 3,000 hp (2,200 kW) of power for both passenger and freight working. Brush Electric Engineering Ltd. (Brush Traction) in association with Sulzer Brothers Ltd. responded with a 4,000 hp (3,000 kW) locomotive for British Rail's appraisal. The design principle was that a single engine would require less maintenance than twin-engined vehicles, and that the very high power would mean that double heading for freight trains would be unnecessary.
Read more about this topic: British Rail HS4000
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