The reference for locomotives and railcars
Furness Railway class 94 “Improved Cleator Tanks”
Rush class L4
Great Britain | 1912 | 4 produced
Locomotive Magazine, August 1915

A few years after the tank locomotives known as “Cleator tanks”, Pettigrew developed another type, now again intended for hauling iron ore to the blast furnaces on the coast at Workington. In return, they received coupled wheels that, at 4 ft 7.5 in, were even smaller than those of the class 112. Although designated class 94 by the Furness Railway from the number of the first engine built, they are now also known as class L4.

The first two examples, numbered 94 and 95, were completed in 1912 and had a smokebox superheater. Since this apparently did not meet the expectations placed in it, numbers 92 and 93 from 1914 were again built without this superheater. The space thus freed up in the smoke chamber was used to lengthen the actual boiler barrel instead, thus enlarging the tube heating surface.

All four were still in use when the Furness Railway was merged into the LMS in 1923. The first two examples were still unchanged, since the removal of the superheater would have required a completely new boiler. The four locomotives were retired between 1929 and 1935, with number 95 being the first to be affected and 94 being the last.

VariantNo. 94 and 95No. 92 and 93
ManufacturerKitson & Co.
Axle config0-6-2T (Webb) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length30 ft 0 7/8 in35 ft 6 1/2 in
Wheelbase20 ft 8 in
Fixed wheelbase14 ft 5 in
Empty weight105,500 lbs
Service weight127,455 lbs131,265 lbs
Adhesive weight96,320 lbs
Axle load34,020 lbs
Water capacity1,381 us gal1,405 us gal
Fuel capacity5,040 lbs (coal)
Power sourcesteam
Estimated power675 hp (503 kW)
Optimal speed20 mph
Starting effort21,933 lbf
Power Plant
Driver diameter55.5 in
Boiler pressure170 psi
Expansion typesimple
Cylinderstwo, 18 x 26 in
Grate area20.5 sq ft
Firebox area107 sq ft
Tube heating area1,139 sq ft
Evaporative heating area1,246 sq ft
Total heating area1,246 sq ft
Calculated Values
steam locomotive
tank locomotive
William Frank Pettigrew
last changed: 06/2022

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