The arduous Calder Valley route meant they needed more power than most sets, so they were fitted with Rolls-Royce C6NFLH engines, and when delivered they had the highest hp/ton of any of the DMUs, including the lightweights. With a set weighing 87½ tons (tare), this gave a power-to-weight ratio of 8.3 hp / ton, which was appreciably higher than any other all-diesel sets in use at the time using normally aspirated engines. Performance tests included a standing start against a ruling gradient of 1 in 261 and a set in tare condition achieved a speed of in 45 seconds, in 2 minutes 4 seconds, and in 4 minutes 6 seconds. From a standing start on a 1 in 45 gradient a speed of in third gear was reached in 42 seconds. Each set had 24 first class and 159 second class seats.
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| - The arduous Calder Valley route meant they needed more power than most sets, so they were fitted with Rolls-Royce C6NFLH engines, and when delivered they had the highest hp/ton of any of the DMUs, including the lightweights. With a set weighing 87½ tons (tare), this gave a power-to-weight ratio of 8.3 hp / ton, which was appreciably higher than any other all-diesel sets in use at the time using normally aspirated engines. Performance tests included a standing start against a ruling gradient of 1 in 261 and a set in tare condition achieved a speed of in 45 seconds, in 2 minutes 4 seconds, and in 4 minutes 6 seconds. From a standing start on a 1 in 45 gradient a speed of in third gear was reached in 42 seconds. Each set had 24 first class and 159 second class seats.
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numberbuilt
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dbkwik:uk-transpor...iPageUsesTemplate
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dbkwik:uktransport...iPageUsesTemplate
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yearscrapped
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refurbishment
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multipleworking
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safety
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Brakes
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poweroutput
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Engine
| - Two Rolls-Royce C6NFLH engines per power car
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numberpreserved
| - One 3-car set, One 2-car set
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transmission
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yearconstruction
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coupling
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abstract
| - The arduous Calder Valley route meant they needed more power than most sets, so they were fitted with Rolls-Royce C6NFLH engines, and when delivered they had the highest hp/ton of any of the DMUs, including the lightweights. With a set weighing 87½ tons (tare), this gave a power-to-weight ratio of 8.3 hp / ton, which was appreciably higher than any other all-diesel sets in use at the time using normally aspirated engines. Performance tests included a standing start against a ruling gradient of 1 in 261 and a set in tare condition achieved a speed of in 45 seconds, in 2 minutes 4 seconds, and in 4 minutes 6 seconds. From a standing start on a 1 in 45 gradient a speed of in third gear was reached in 42 seconds. Each set had 24 first class and 159 second class seats.
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