Furness 0-6-2 Locomotives in Great_Britain


Class Details by Steve Llanso of Sweat House Media

Class Cleator Tank/L1 (Locobase 1118)

Data from "Six-Coupled Radial Tank Engine for the Furness Railway" The Locomotive & Railway Carriage & Wagon Review, Volume III [3] (October 1898), p. 153. See also "Furness Railway 'Cleator Tanks'" on Railway Matters on Track website at [link], last accessed 24 January 2021. Works numbers werwe 4364-4366 in 1898.

WF Pettigrew designed these powerful, short-ranged tank engines that were used on the iron-ore trains that ran through the northern part of the Furness Railway system. He added ten more of the same design in 1903-1904; see Locobase 10459.


Class Cleator Tank/L2 (Locobase 10459)

Data from "Six-Coupled Radial Tank Locomotive, Furness Ry" The Locomotive & Railway Carriage & Wagon Review, Vol X (15 August 1904), p. 139. See also "Furness Railway 'Cleator Tanks'" on Railway Matters on Track website at [link], last accessed 24 January 2021. Produced by Nasmyth Wilson (Works numbers 689-693 in 1904) and North British Locomotive Company (works numbers 16113-11634 in 1904).

As noted in Locobase 1118, WF Pettigrew designed these powerful, short-ranged tank engines. The first three and the next ten were separated by five years, but the differences were not immediately apparent. Boiler pressure rose by 10 psi (0.69 bar) which compensated for the 4" (102 mm) increase of the drivers' diameter; the boiler's center line was raised by 6" (152 mm) to 7 ft 9 in (2.36 m). One supposes that the taller drivers made a little more speed available to the commuter trains these locomotives were intended to pull.

The LM report noted a difficulty in running the locomotives, however, in that one section of the line a weight limitations restricted the engine to 53 tons 5 cwt (119,280 lb) and carry only 1,150 Imp gal (1,380 US gal) of water. A lock valve on the equalising pipes that balanced the tanks prevented any more water from entering the tanks.


Class Cleator Tank/L3 (Locobase 20319)

Data from "New Locomotives, Furness Ry" The Locomotive Magazine, Vol XIII [13] (15 May 1907), p. 89. See also Steamindex's Furness Railway entry at [link], last accessed 29 October 2017. Works numbers were 17808-17813 in 1907. See also "Furness Railway 'Cleator Tanks'" on Railway Matters on Track website at [link], last accessed 24 January 2021. Works numbers were 17808-17813 in 1907.

Locobases 11118 and 10459 show the first two batches of Cleator Tanks. This batch of six continued the design, but changed the engine's water distribution. The builder shortened both side tanks and enlarged the rear water bunker. This better balance of variable weight may have extended their lifetimes, steamindex argues, because they could more freely move around the system.


Class L4 Improved Cleator (Locobase 20318)

Data from "New Engines for the Furness Ry" The Locomotive Magazine, Vol XX [20], No 264 (15 August 1914), p. 209-210. See also "Furness Railway 'Cleator Tanks'" on Railway Matters on Track website at [link], last accessed 24 January 2021.Works numbers were 4855-4856 in 1912 and 5042-5043 in 1914.

These were the last of the basic Cleator Tank design with a larger boiler.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassCleator Tank/L1Cleator Tank/L2Cleator Tank/L3L4 Improved Cleator
Locobase ID1118 10459 20319 20318
RailroadFurnessFurnessFurnessFurness
CountryGreat BritainGreat BritainGreat BritainGreat Britain
Whyte0-6-2T0-6-2T0-6-2T0-6-2T
Number in Class31062
Road Numbers112-114/11622-1162498-107/11625-1163496-97, 108-111/11635-1164094-95, 92-93/11641-11644
GaugeStdStdStdStd
Number Built31062
BuilderSharp, StewartseveralNorth BritishKitson & Co
Year1898190419071914
Valve GearStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.42 / 4.4014.42 / 4.4014.42 / 4.4014.42 / 4.40
Engine Wheelbase (ft / m)20.67 / 6.3020.67 / 6.3020.67 / 6.3020.67 / 6.30
Ratio of driving wheelbase to overall engine wheelbase 0.70 0.70 0.70 0.70
Overall Wheelbase (engine & tender) (ft / m)20.67 / 6.3020.67 / 6.3020.67 / 6.3020.67 / 6.30
Axle Loading (Maximum Weight per Axle) (lbs / kg)35,952 / 16,30833,824 / 15,34233,824 / 15,342
Weight on Drivers (lbs / kg)99,680 / 45,21496,320 / 43,69096,320 / 43,690
Engine Weight (lbs / kg)123,200 / 55,883124,880 / 56,645131,040 / 59,439124,880 / 56,645
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)123,200 / 55,883124,880 / 56,645131,040 / 59,439124,880 / 56,645
Tender Water Capacity (gals / ML)1680 / 6.362040 / 7.732040 / 7.732040 / 7.73
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.60 / 2 2.20 / 2 2.20 / 2 2.20 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)55 / 27.5054 / 2754 / 27
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 142261 / 152461 / 152455.50 / 1410
Boiler Pressure (psi / kPa)150 / 1030160 / 1100160 / 1100170 / 1170
High Pressure Cylinders (dia x stroke) (in / mm)18" x 26" / 457x66018" x 26" / 457x66018" x 26" / 457x66018" x 26" / 457x660
Tractive Effort (lbs / kg)19,180 / 8699.9118,781 / 8518.9318,781 / 8518.9321,933 / 9948.65
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.20 5.13 4.39
Heating Ability
Tubes (number - dia) (in / mm)208 - 1.75" / 44208 - 1.75" / 44208 - 1.75" / 44230 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.81 / 3.3010.81 / 3.2910.81 / 3.2910.81 / 3.29
Firebox Area (sq ft / m2)105 / 9.76105 / 9.75105 / 9.75107 / 9.94
Grate Area (sq ft / m2)20.50 / 1.9120.50 / 1.9020.50 / 1.9020.50 / 1.90
Evaporative Heating Surface (sq ft / m2)1134 / 105.391138 / 105.721134 / 105.351246 / 115.76
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1134 / 105.391138 / 105.721134 / 105.351246 / 115.76
Evaporative Heating Surface/Cylinder Volume148.09148.61148.09162.71
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3075328032803485
Same as above plus superheater percentage3075328032803485
Same as above but substitute firebox area for grate area15,75016,80016,80018,190
Power L13033353335243657
Power MT201.24242.60251.11

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