British Rail Class 29

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British Railways Class 29
Class 29 D6121 (8392450774).jpg
D6121 in BR green livery with white stripe and large yellow warning panel and headcode at Inverness MPD, August 1968
Type and origin
Power typeDiesel-electric
Builder North British Locomotive Co.
Build date1958–1960 (original Class 21)
RebuilderPaxman
Rebuild dateRebuilt: 1963, 1965–1967
Number rebuilt20
Specifications
Configuration:
   UIC Bo'Bo'
  Commonwealth Bo-Bo
Gauge 4 ft 8+12 in (1,435 mm) standard gauge
Wheel diameter3 ft 7 in (1.092 m)
Minimum curve 3.5 chains (231.00 ft; 70.41 m)
Wheelbase 37 ft 0 in (11.28 m)
Length51 ft 6 in (15.70 m)
Width8 ft 8 in (2.64 m)
Height12 ft 8 in (3.86 m)
Loco weight73 long tons (74.2  t; 81.8 short tons)
Fuel capacity460 imp gal (2,100 L; 550 US gal)
Prime mover Paxman Ventura
Engine type V12 diesel
Generator DC generator
Traction motors 4 GEC DC motors
Transmission Diesel electric
MU working Red Circle
Train heating Steam
Train brakes Vacuum
Performance figures
Maximum speed80 mph (130 km/h)
Power outputEngine: 1,350  hp (1,010  kW)
Tractive effort Maximum: 45,000  lbf (200  kN)
Brakeforce50 long tons-force (498  kN)
Career
Operators British Rail
NumbersD6100–03/06–08/12–14/16/19, D6121/23/24/29/30/32/33/37
Axle load class Route availability 6 (RA 5 from 1969)
Retired1969–1971
DispositionAll scrapped

The British Rail Class 29 were a class of 20 diesel-electric Bo-Bo locomotives produced by the re-engining of the NBL Type 2 units. The units were designed for both passenger and freight trains.

Contents

Background

The machines were produced from 1963 onwards from the North British Type 2 (later Class 21 under TOPS) by replacing the original unreliable licence-built MAN engines of the Class 21s with Paxman Ventura V12 engines at Paxman's Colchester works.

The first unit to be re-engined was D6123, a further 19 machines were re-engined in 1965–1967 at Glasgow Works and mostly Inverurie Works, along with other modifications including the fitting of four-character headcode displays in the nose ends (D6123 retained its original front ends and so did not receive a headcode panel). [1] After rebuilding, they returned to service from Eastfield depot in Glasgow. The allocation of all twenty locomotives in August 1967 was Eastfield. [2]

Withdrawal

Although these offered more power and much improved reliability over the original Class 21s, they did not survive much longer, due to their small class size and the use of a non-standard high-speed diesel engine. D6108 was withdrawn in May 1969 and scrapped by McWilliams of Shettleston in 1971, while the other 19 were withdrawn between April and December 1971 and scrapped at BR's Glasgow Works in 1971–72. No Class 21, 22 or Class 29 locomotives survive today.

Numbering

The rebuilt locomotives were numbered: [3]

Model railways

In 1978 Hornby Railways launched its first version of the BR Class 29 in BR green and blue liveries in OO gauge. [4] Dapol have more recently produced a Class 29 in multiple liveries.

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References

  1. xp64mag.co.uk [ full citation needed ]
  2. British Rail Locoshed Book. Shepperton: Ian Allan. February 1968. pp. 26–27. ISBN   0-7110-0004-2.
  3. "29 Bo-Bo". Brdatabase.info. Retrieved 4 August 2022.
  4. "Hornby BR Class 29". Hornby Railways Collector Guide. Retrieved 1 February 2020.

Sources

Further reading