Great Western 0-6-2 Locomotives in Great_Britain


Class Details by Steve Llanso of Sweat House Media

Class 56xx (Locobase 3585)

See [] (Information by John Daniel, 2000) for details on this class, including all names. See also Peter Gilliam, "GWR 5600 Class" notes for his Akamaihid train simulation Release 2.1 (2013). GWR built 150 of the class with the last 50 supplied by Armstrong-Whitworth.

These moved coal traffic in South Wales. Daniels tells us that the 0-6-2T arrangement was settled on as "the best suited for the work and working conditions." Later, however, he comments that they ran better with the trailing truck leading. Elsewhere on his site, Daniels provides the clue that a driver-leading design would have better starting traction in certain conditions.

Peter Gilliam notes, however, that the class had a "long and fairly tortuous" introduction, in large part because they were rushed to fill a void in South Wales needlessly (Gilliam's view) caused by premature retirements of many of the "Taffy Tanks" that had served railways such as the Barry and the Rhymney for decades. The design itself suffered from the GWR's fitting of tight axle boxes, which the Rhymney's Caerphillly Works eventually diagnosed as owing to too little play in the axles. Gilliam describes the letter the Works' Director sent the GWR's chief mechanical officer Charles Collett as "strongly worded". Yes, he said, the 5600 was a high-quality design, but not suitable for the lines for which they were intended. (One specific flaw required the shops to remove frames before servicing the springs, "tiresome if not hazardous to those working on them.")

Whatever the objective merits, these cousins of the Rhymney "Taffy Tanks" did well. Their drivers, Gilliam reports, often ran the engines smokebox first when climbing away from the ports into the hills, then coasted back down with a loaded train with the radial truck leading. AW's engines were delivered with noisy brakes, which were then modified, but were otherwise satisfactory.

The class , surviving until their retirements in 1962-1965.

Principal Dimensions by Steve Llanso of Sweat House Media

Class56xx
Locobase ID3585
RailroadGreat Western
CountryGreat Britain
Whyte0-6-2T
Number in Class100
Road Numbers5600-5699, 6600-6699
GaugeStd
Number Built100
Builderseveral
Year1924
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)15.25 / 4.65
Engine Wheelbase (ft / m)21.75 / 6.63
Ratio of driving wheelbase to overall engine wheelbase 0.70
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)41,776 / 18,949
Weight on Drivers (lbs / kg)124,544 / 56,492
Engine Weight (lbs / kg)153,664 / 69,701
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)153,664 / 69,701
Tender Water Capacity (gals / ML)2280 / 8.64
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)69 / 34.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)55.50 / 1410
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)18" x 26" / 457x660
Tractive Effort (lbs / kg)25,803 / 11704.06
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.83
Heating Ability
Tubes (number - dia) (in / mm)218 - 1.625" / 41
Flues (number - dia) (in / mm)6 - 5.125" / 130
Flue/Tube length (ft / m)11 / 3.35
Firebox Area (sq ft / m2)121.80 / 11.32
Grate Area (sq ft / m2)20.35 / 1.89
Evaporative Heating Surface (sq ft / m2)1267 / 117.75
Superheating Surface (sq ft / m2)82 / 7.62
Combined Heating Surface (sq ft / m2)1349 / 125.37
Evaporative Heating Surface/Cylinder Volume165.46
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4070
Same as above plus superheater percentage4314
Same as above but substitute firebox area for grate area25,822
Power L16315
Power MT335.36

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