Derby Works 25/1

Built by Beyer & Peacock, Crewe Works, Darlington Works, Derby Works

Top speed

145 km/h

90 mph

Power output

932 kW

1,250 hp

Length

15.39 m

50 ft 6 in

Track gauge

1,435 mm

Standard gauge

Axle arrangement

Bo'Bo'

Overview of the Derby Works 25/1

Discover the impressive Class 25/1 diesel locomotive, a stalwart of British railways.

This robust locomotive, officially known as the BR 25/1, features a powerful Sulzer 6LDA28-B prime mover delivering 932 kW of power.

With a top speed of 145 km/h and a tractive effort of 170 kN, the 25/1 is a capable machine, boasting a length of 15.39 meters and a UIC axle arrangement of Bo'Bo'.

Originally built by Beyer & Peacock, Crewe Works, Darlington Works, and Derby Works, these locomotives have found continued life with private owners groups and heritage railways like the North Norfolk Railway, preserving a piece of railway history.

The 25/1 locomotive, with its standard gauge of 1435 mm, is a classic example of diesel traction that continues to capture the imagination of railway enthusiasts.

Derby Works 25/1 technical specifications

	Value	Imperial / US
Series	BR25
Built by	Beyer & Peacock, Crewe Works, Darlington Works, Derby Works
Top speed	145 km/h90 mph	90 mph
Power output	932 kW1,250 hp	1,250 hp
Tractive effort	170 kN38,218 lbf	38,218 lbf
Prime mover	Sulzer 6LDA28-B
Track gauge	1,435 mmStandard gauge4 ft 8½ in	4 ft 8½ in
UIC axle arrangement	Bo'Bo'
Length	15.39 m50 ft 6 in	50 ft 6 in
Width	2.77 m9 ft 1 in	9 ft 1 in
Height	3.86 m12 ft 8 in	12 ft 8 in

Source of the data: en.wikipedia.orgView this model on trainspo.com Spotted an error? Let us know

Operators of the Derby Works 25/1

Railway companies that have operated the 25/1, with the class designation used by each of them.

Operator	Class	Country
British Railways Board	BR 25/1	United Kingdom
North Norfolk Railway	NNR 25/1	United Kingdom
Private owners group	@private-uk 25/1	United Kingdom
Private owners group	@private-uk 25/1	United Kingdom