Title: British Rail Class 23 - Wikipedia
Headings: British Rail Class 23
British Rail Class 23
From Wikipedia, the free encyclopedia
Contents
Introduction and service history
Operation
Technical, design and reliability problems
Modification
Withdrawal
Preservation
Models
References
Sources
Online sources
Further reading
External links

Content: British Rail Class 23 - Wikipedia
British Rail Class 23
From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
English Electric Type 2
British Rail Class 23
"Baby Deltic" D5902 at King's Cross, July 1966. Type and origin
Power type
Diesel-electric
Builder
English Electric at Vulcan Foundry
Build date
1959
Total produced
10
Specifications
Configuration: ​
• UIC
Bo'Bo'
• Commonwealth
Bo-Bo
Gauge
4 ft 8
+
1⁄2 in ( 1,435 mm) standard gauge
Wheel diameter
3 ft 7 in (1.092 m)
Minimum curve
4 chains (80 m)
Wheelbase
40 ft 6 in (12.34 m)
Length
52 ft 6 in (16.00 m)
Width
8 ft 10 3⁄4 in (2.71 m)
Height
12 ft 8 in (3.86 m)
Loco weight
74 long tons (75.2 t; 82.9 short tons)
Fuel capacity
550 imp gal (2,500 l; 660 US gal)
Prime mover
Napier T9-29 Deltic
Generator
DC
Traction motors
DC
Transmission
diesel electric
MU working
★ Blue star
Train heating
Steam
Train brakes
Vacuum
Performance figures
Maximum speed
75 mph (121 km/h)
Power output
Engine: 1,100 hp (820 kW)
Tractive effort
Maximum: 47,000 lbf (209.1 kN)
Brakeforce
360 kN (36 long tons-force)
Career
Operators
British Railways
Numbers
D5900–D5909
Nicknames
Baby Deltic
Axle load class
Route availability 5
Withdrawn
1968–1971
Disposition
All scrapped, one new member being built
The British Rail Class 23 were a class of ten Bo-Bo diesel-electric locomotives built by the English Electric Company (EE) in 1959. The power unit used was a Napier Deltic T9-29 9-cylinder engine of 1,100 bhp (820 kW) driving an EE generator, which powered the four traction motors. They were numbered from D5900 to D5909. The T9-29 diesel engine was a single, half-sized version of those used in the more powerful British Rail Class 55 'Deltic' locomotives, and the overall design and external appearance of the Class 23 was also similar to the Class 55, but much shorter, leading to their nickname of Baby Deltics .