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The reference for locomotives and railcars

Lancashire & Yorkshire class 30 (Hughes)

London, Midland & Scottish class 6F

Great Britain 1907 80 produced
Locomotive Magazine, August 1907

George Hughes produced his first class 30 locomotive by rebuilding a class 30 locomotive from his predecessor Aspinall to a four-cylinder compound. Ten more were created in this form. Other locomotives with two cylinders and simple steam expansion, which were built from 1910 onwards, were also assigned to class 30. 29 of these had been converted from Aspinall's class 30 and 40 more had Hughes built new at Horwich. Later they received superheaters so that they were similar to the class 31. They were assigned to power class 6F by the LMS. The last locomotives survived the formation of British Railways and were retired in 1951.

Technical data

General

Property compound simple
Built 1907 1910-1918
Manufacturers Horwich
Wheel arrangement 0-8-0 (Eight-coupled)
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property compound simple
Wheelbase 4.98 m
Service mass 61.8 t 67.9 t
Adhesion mass 61.8 t 67.9 t
Total mass 103.9 t 110 t
Rigid wheelbase 4.98 m
Axle load 15.4 t 17.8 t
Water capacity 16,364 l
Fuel capacity 5.1 t (coal)

Boiler

Property compound simple
Grate area 2.141 m² 2.378 m²
Firebox surface 13.657 m² 17.652 m²
Tube heating surface 164.16 m² 210.24 m²
Evaporative heating surface 177.817 m² 227.891 m²
Total heating surface 177.8 m² 227.9 m²

Power plant

Property compound simple
Driver diameter 1,372 mm
Boiler pressure 12.4 bar
Expansion type compound simple expansion
Cylinders four, HP: 394 x 660 mm and LP: 559 x 660 mm two, 508 x 660 mm

Power

Property compound simple
Power source steam
Estimated power 671 kW (912 PS) 746 kW (1,014 PS)
Starting effort 105.2 kN 131.1 kN
Starting effort simple 126.3 kN

Calculated values

Property compound simple
Factor of adhesion 1 : 5.76 1 : 5.08
Optimal speed 39 km/h 35 km/h
Power-to-weight ratio 10.9 kW/t 11.0 kW/t
Heating Surface Equivalent 246.1 m² 316.2 m²
Cylinder volume/HSE 1 : 1,311.45 1 : 846.76
Adhesive weight/Total 1 : 1.00
Tractive force/Heating surface 1 : 12.36 1 : 12.01
Grate area/Heating surface 1 : 83.05 1 : 95.83
Firebox/Tube surface 1 : 12.02 1 : 11.91
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