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The reference for locomotives and railcars

Lancashire & Yorkshire classes 5 and 6

Great Britain 1889 328 produced
No. 1051 with crew Bulgarisches Staatsarchiv, Sofia PD

The class 5 of the Lancashire & Yorkshire Railway was a 2-4-2T tank locomotive designed by John Aspinall in 1889 for passenger work. As a so-called “radial tank” with radially adjustable carrying axles at both ends and with driving wheels of 68 inches (1.727 mm), they could reach good speeds in both directions. Depending on the year of production, the cylinders had a diameter of 17.5 or 18 inches.

Starting in 1898, they were built with longer frames which allowed larger supplies and increased the service weight by nearly two and a half tons. When George Hughes took over in 1904, he produced these locomotives with a Belpaire firebox and an extended smokebox. By 1911, 310 had been built. All were later taken over by the LMS and in 1948, 105 came to British Railways.

Starting in 1911, Hughes took 46 and superheated them, these were later called class 6. These also got a Belpaire firebox, an extended smokebox and the cylinder diameter was increased to 20 inches. By 1914, 18 more had been newly built in this form. Also these 18 came to the LMS and eight survived until British Railways times. The last ones were withdrawn in 1961.

Technical data

General

Property 5 6
Built 1889-1911 1911-1914
Manufacturers Horwich
Wheel arrangement 2-4-2T (Columbia)
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property 5 6
Length 11.95 m
Wheelbase 7.42 m
Service mass 57.7 t 67.5 t
Adhesion mass 32.3 t 39.9 t
Rigid wheelbase 2.62 m
Axle load 17.8 t 20 t
Water capacity 6,091 l 6,999 l
Fuel capacity 2.3 t (coal) 3.2 t (coal)

Boiler

Property 5 6
Grate area 1.742 m²
Firebox surface 10.004 m² 9.974 m²
Tube heating surface 102.966 m² 75.517 m²
Evaporative heating surface 112.97 m² 85.491 m²
Total heating surface 113.0 m² 103.6 m²
Superheater surface 18.116 m²

Power plant

Property 5 6
Driver diameter 1,727 mm
Boiler pressure 11 bar 12.4 bar
Expansion type simple expansion
Cylinders two, 444 x 660 mm two, 521 x 660 mm

Power

Property 5 6
Power source steam
Estimated power 447 kW (608 PS) 634 kW (862 PS)
Starting effort 70.8 kN 109.4 kN

Calculated values

Property 5 6
Factor of adhesion 1 : 4.47 1 : 3.58
Optimal speed 39 km/h 35 km/h
Power-to-weight ratio 7.8 kW/t 9.4 kW/t
Heating Surface Equivalent 163.0 m² 171.6 m²
Cylinder volume/HSE 1 : 1,257.50 1 : 1,639.09
Adhesive weight/Total 1 : 1.79 1 : 1.69
Tractive force/Heating surface 1 : 13.10 1 : 22.05
Grate area/Heating surface 1 : 64.85 1 : 59.48
Firebox/Tube surface 1 : 10.29 1 : 7.57
Total/Superheater 1 : 4.72

Topics

  • steam locomotive
  • passenger
  • tank locomotive
  • John Aspinall
  • George Hughes
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Last changed: 08/2024

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