Liverpool & Manchester 2-2-2 Locomotives in Great_Britain

Class Details by Steve Llanso of Sweat House Media

Class Patentee (Locobase 3029)

Data from Gustav Reder (Michael Reynolds, trans), The world of steam locomotives (New York: Putnam, 1974).

Based on Stephenson's Planet, this design added the trailing axle that allowed for a larger firebox and improved the ride. Reder argues that the improved ride was "only a happy coincidence." Rather the 1833 patent shows that Stephenson's main intent was to "sustain the weight of a larger boiler than herebefore (sic) used." In addition to the 2-2-2 arrangement, the patent also covered the valve gear, and the frame, which was of the sandwich type with thick wooden members flanked by wrought iron. Stephenson also eliminated the flange from the driver to prevent it from shouldering against the rail in curves.

Whatever the reason for adoption of the 2-2-2, the Patentee was the first of thousands of the type. The Sharp type had welded axle horns and a gently bowed frame to eliminate axle horn breakage.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID3029
RailroadLiverpool & Manchester
CountryGreat Britain
Number in Class
Road Numbers
Number Built
BuilderRobert Stephenson & Co
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)10 / 3.05
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)9637 / 4371
Weight on Drivers (lbs / kg)9637 / 4371
Engine Weight (lbs / kg)25,760 / 11,685
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)16 / 8
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)60 / 1524
Boiler Pressure (psi / kPa)50 / 3.40
High Pressure Cylinders (dia x stroke) (in / mm)11" x 18" / 279x457
Tractive Effort (lbs / kg)1543 / 699.89
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.25
Heating Ability
Tubes (number - dia) (in / mm)106 - 1.625" / 41
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 7.09 / 2.16
Firebox Area (sq ft / m2)52.20 / 4.85
Grate Area (sq ft / m2) 9.90 / 0.92
Evaporative Heating Surface (sq ft / m2)364 / 33.83
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)364 / 33.83
Evaporative Heating Surface/Cylinder Volume183.85
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation495
Same as above plus superheater percentage495
Same as above but substitute firebox area for grate area2610
Power L11578
Power MT360.99

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