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The reference for locomotives and railcars

London & North Western class 380

London, Midland & Scottish class 5F

Great Britain 1923 30 produced
Locomotive Magazine, October 1923

Instead of ordering another batch of the class 1185 with a 0-8-2T wheel arrangement, H.P.M. Beames developed the class 380 with a two-axle trailing bogie to get more space for the supplies. Their area of application was the steep and winding lines in the valleys of South Wales, on which they were to pull freight trains and, if necessary, also be used in front of passenger trains. When the locomotives were delivered, the LNWR had already been merged into the LMS, where they were classified in power class 5F. 14 of the 30 locos survived the founding of British Railways, but these were retired by 1951.

Technical data

General

Built
1923-1924
Manufacturers
Crewe
Wheel arrangement
0-8-4T
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Service mass
89.4 t
Adhesion mass
67.6 t
Water capacity
9,229 l
Fuel capacity
3.6 t (coal)

Boiler

Grate area
2.183 m²
Evaporative heating surface
156.728 m²
Superheater surface
33.352 m²
Total heating surface
190.1 m²

Power plant

Driver diameter
1,346 mm
Boiler pressure
12.8 bar
Expansion type
simple expansion
Cylinders
two, 521 x 610 mm

Power

Power source
steam
Estimated power
783 kW (1,065 PS)
Starting effort
133.1 kN

Calculated values

Factor of adhesion
1 : 4.98
Optimal speed
35 km/h
Power-to-weight ratio
8.8 kW/t
Adhesive weight/Total
1 : 1.32
Tractive force/Heating surface
1 : 14.63
Grate area/Heating surface
1 : 87.07
Total/Superheater
1 : 4.70
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