British Rail Class D16/2

British Rail Class D16/2
10201 at Tring, 1959
Type and origin
Power type Diesel-electric
Builder
Order number SR Order 3441
Build date 1950 (10201/10202)
1954 (10203)
Specifications
Configuration:
 ​
 • UIC (1'Co)(Co1')
 • Commonwealth 1Co-Co1
Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge
Wheel diameter
  • Driving: 3 ft 7 in (1.092 m)
  • Idling: 3 ft 1 in (0.940 m)
Minimum curve 4.5 chains (297.00 ft; 90.53 m)
Wheelbase 55 ft 6 in (16.92 m)
Length 63 ft 9 in (19.43 m)
Width 9 ft 3 in (2.82 m)
Height 13 ft 1 in (3.99 m)
Loco weight 133 long tons (135 t; 149 short tons)
Fuel capacity 1,150 imp gal (5,200 l; 1,380 US gal)
Lubricant cap. 16 imp gal (73 l; 19 US gal)
Coolant cap. 280 imp gal (1,300 l; 340 US gal)
Prime mover English Electric 16SVT
Traction motors English Electric 526A, 6 off
Cylinder size 10 in × 12 in (254.0 mm × 304.8 mm)
Train heating Steam
Train brakes Vacuum
Performance figures
Maximum speed 90 mph (140 km/h)
Power output Engine:
10201/2: 1,750 bhp (1,300 kW)
1,600 bhp (1,200 kW) from 1957
10203: 2,000 bhp (1,500 kW)
At rail :
10201/2 1,300 bhp (970 kW)
Tractive effort 10201/2: 48,000 lbf (213.5 kN)
Career
Operators British Railways
Class
  • 10201/2: D16/2, later 16/9
  • 10203: D20/3, later 20/9
Power class
  • 10201/2: 6P5F, later 5P5F
  • 10203: 7P6F, later 6P6F
Numbers 10201–10203
Axle load class RA 6
Withdrawn 1963
Disposition All scrapped

British Railways Class D16/2 was a class of prototype diesel locomotive built by BR at Ashford Works and introduced in 1950–1951, with a third example being introduced in 1954. They had been designed by Oliver Bulleid for the Southern Railway before the 1948 nationalisation but did not appear until after nationalisation. The diesel engine and transmission were supplied by the English Electric company but the Bulleid influence was obvious. The box-like body style closely resembled Bulleid's electric locomotives and was quite different from the usual English Electric style, typified by British Rail Class D16/1.

Unusually for pioneer British diesels, 10201 and 10202 were originally specified (prior to alteration of gear ratios to improve tractive effort when operating as mixed-traffic units) with a top speed of 110 mph (180 km/h) rather than the 90 mph (140 km/h) of 10203,[1] pre-dating the three-figure maximum speeds of the Deltic and Class 50 designs by some years.

Percy Bollen's bogie design[2] and the power train of 10203 were taken almost unmodified for the first ten production British Rail Class 40s but with a more traditional English Electric design of body with prominent noses and louvred side panels.

Operation

10203 at Wolverton, in 1957

The original locomotives, numbered 10201 and 10202, worked services on the Southern Region of British Railways. They were transferred to Camden depot in the London Midland Region in April 1955.

Number 10203 was outshopped from Brighton works in March 1954, its modified engine giving a power output of 2,000 hp (1,500 kW). It was trialled on the Southern Region before joining its sisters on the London Midland, being allocated to Willesden depot.

All three locomotives were non-standard with regards to spare parts and servicing and they were withdrawn at the end of 1963. After spending some time on the scrap line at Derby Works they were eventually scrapped at Cashmore's at Great Bridge in 1968.

Additional information

  • Bogie wheelbase (rigid): 16 ft 0 in (4.88 m)
  • Bogie wheelbase (total): 21 ft 6 in (6.55 m)
  • Bogie pivot centres: 28 ft 6 in (8.69 m)
  • Sanding equipment: Pneumatic
  • Heating boiler: Spanner
  • Gear ratio: Originally 17:65, amended to 19:61
  • Boiler water capacity: 880 imp gal (4,000 l; 1,060 US gal)
  • Boiler fuel capacity: From main supply

Footnotes

  1. ↑ http://www.southernelectric.org.uk/features/historical-features/watexdieselops.html
  2. ↑ "Brief Biographies of Major Mechanical Engineers". Steamindex. Steamindex. Retrieved 11 February 2017.

References

  • Strickland, David C. (September 1983). Locomotive Directory: Every Single One There Has Ever Been. Camberley, Surrey: Diesel and Electric Group. pp. 27, 29. ISBN 978-0-9063-7510-5. OCLC 16601890.
  • Stephens, Robert (1988). Diesel Pioneers. Atlantic Transport. ISBN 0-906899-29-X.

Further reading

  • Clough, David N. (2011). "2: Diesel-Electric Development after 1945". Hydraulic vs Electric: The battle for the BR diesel fleet. Ian Allan. pp. 19–24. ISBN 978-0-7110-3550-8.
  • Nock, O.S., "Performance and Efficiency Tests on S.R. Diesel Electric Locomotive", The Engineer, 196 No.I, 2 Oct. 1953, pp.424-427, No.II, 9 Oct. 1953, pp.451-453
  • Nock, O.S., "Performance of 2000 H.P. Main-Line Diesel-Electric Locomotive", The Engineer, 201 No.I, 25 May 1956, pp.550-553, No.II, 1 June 1956, pp.588-591
  • Muspratt, Graham, "Bulleid 1CoCo1 Diesel Electric Locomotive", www.semgonline.com
  • "10201-10203", The Railway Centre
  • Photo of 10201 in Birmingham New Street
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