British Rail Class D16/1

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LMS 10000 & 10001
(British Rail class D16/1)
Power type Diesel-electric
Builder LMS Derby Works
Order number LMS Lot number 198
Build date 1947–1948
Total production 2
UIC classification Co'Co'
Gauge ft 8+12 in (1,435 mm)
Wheel diameter 3 ft 6 in (1.067 m)
Wheelbase 51 ft 6 in (15.70 m)
Length 61 ft 2 in (18.64 m)
Locomotive weight 127.65 long tons (129.70 t) later 130.65 long tons (132.75 t)
Fuel capacity 900 imp gal (4,100 l; 1,100 US gal)
Prime mover English Electric 16SVT Mark 1
Engine RPM range 750 (max)
Traction motors EE 519/3B, 6 off
Transmission DC generator
DC traction motors
Multiple working Fitted
Top speed 93 mph (150 km/h)
Power output 1,600 hp (1,200 kW)
Tractive effort 41,400 lbf (184.2 kN)
Train heating Clarkson Steam generator, later replaced by Spanner 2,000 pounds (910 kg) per hour model
Train brakes Vacuum
Career London, Midland and Scottish Railway, British Railways
Power class 6P5F, later 5P5F, later Type 3
Number 10000–10001
Axle load class RA 9
Retired 1963, 1966

British Railways Class D16/1 or 10000 and 10001 were the first mainline diesel locomotives in Great Britain. They were built by the London, Midland and Scottish Railway at its Derby Works, using the EE16SVT 1600 hp diesel engine with electric transmission, in association with English Electric and the Vulcan Foundry, with whom the LMS had had a long working relationship.