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The reference for locomotives and railcars

Lancashire & Yorkshire steam railmotors

Great Britain 1905 20 produced
Hughes type flickr/stratfordman72

The Lancashire & Yorkshire Railway operated a total of 20 steam railmotors which were of two different types. The first two vehicles were of a design that had been built by Kerr, Stuart & Co. for the Taff Vale Railway and was also ordered for the L&YR by George Hughes in 1904. They consisted of a small 0-2-2 locomotive and a passenger car that was designed like a semi-trailer. The locomotives had a small transversely mounted boiler with a central firebox and one smokebox at each end. At the rear end, the trailers had an auxiliary cab and a luggage compartment. They only remained in service until 1909.

In 1906, Hughes introduced a more conventional type that was built a total of 18 times by 1911 in their own shops. The general layout was the same, but the locomotive part was more similar to a conventional tank locomotive. So they had a longitudinally mounted boiler and had both axles driven. All 18 came to the LMS in 1923 and the first ones were only withdrawn in 1927. The last one even formally passed to British Railways in 1948, but was only assigned its new number on paper and withdrawn in March.

Hughes type PD
Kerr, Stuart type Locomotive Magezine, August 1905

Technical data

General

Property Kerr, Stuart Hughes
Built 1905 1096-1911
Manufacturers Kerr, Stuart & Co. Horwich, Newton Heath
Wheel arrangement 2-2-0+4T 0-4-0+4T
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property Kerr, Stuart Hughes
Length 17.88 m 21.16 m
Service mass 38.1 t 48.3 t
Water capacity 2,502 l
Fuel capacity 0.5 t (coal)
Adhesion mass 33.2 t
Axle load 16.6 t

Boiler

Property Kerr, Stuart Hughes
Evaporative heating surface 31.448 m² 47.288 m²
Total heating surface 31.4 m² 47.3 m²
Grate area 0.873 m²

Power plant

Property Kerr, Stuart Hughes
Driver diameter 864 mm 1,109 mm
Boiler pressure 11 bar 12.4 bar
Expansion type simple expansion
Cylinders two, 229 x 356 mm two, 305 x 406 mm

Power

Property Kerr, Stuart Hughes
Power source steam
Estimated power 60 kW (82 PS) 112 kW (152 PS)
Starting effort 20.2 kN 35.9 kN

Calculated values

Property Kerr, Stuart Hughes
Optimal speed 18 km/h 19 km/h
Power-to-weight ratio 1.6 kW/t 2.3 kW/t
Tractive force/Heating surface 1 : 13.40 1 : 15.86
Factor of adhesion 1 : 9.08
Adhesive weight/Total 1 : 1.45
Grate area/Heating surface 1 : 54.17
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