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Deltic Technical Specification
These specifications are drawn from several sources, principally "English Electric Locomotives of British Rail" by Brian Webb. Various modifications were made as time went by, mainly the addition of train air brakes and electric train heating. These resulted in some slight increase in weight.
Particularly relevant to the current situation is that the the bogies and traction motors, while not identical to the more numerous classes 50 and 37, are completely interchangeable. There are several 37's still in existence, both on service and in store.
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First BR Class
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33/3, Type 5
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Second BR Class
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55
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Axle Layout
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Co-Co |
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Engine Model
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2 x Napier Deltic D18-25
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Engine rating
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1650BHP @ 1500rpm (each)
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Weight, in working order
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99 tons 0 cwt as delivered
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Weight, empty
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94 tons 8 cwt
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Brakes, locomotive
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Automatic Air/Straight Air
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Brakes, train
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Automatic air/air/Continuous Vacuum
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Train heating
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Steam, Spanner Mk2 boiler. ETH from main generator
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Boiler water supply
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830 gallons
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Length over buffers
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69ft 6in
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Overall width
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8ft 9 1/2in
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Overall height
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12ft 11in
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Wheel diameter
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3ft 7in
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Bogie pivots
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45ft 0in
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Bogie Wheelbase
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13ft 6in
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Total wheelbase
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58ft 0in
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Maximum tractive effort
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50,000lb @ 21.7% adhesion
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Continuous tractive effort
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30,500lb @ 32.5mph
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Continuous rail hp
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2640
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Total fuel capacity
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826 gallons
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Route availability
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RA5
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Traction motors
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EE type 538
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Gear ratio
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21:59
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Main generators
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EE type 829
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Contract annual mileage
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220,000 per annum
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Power to weight ratio
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33.3BHP per ton
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Top speed
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125mph (normally 110mph in service)
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Number series
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D9000-D9021, later 55001-55022
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