Shanghai-Nanking 4-2-2 Locomotives in China

Class Details by Steve Llanso of Sweat House Media

Class D (Locobase 2665)

Data from "4-2-2 Locomotive, Shanghai-Nanking Railway", Locomotive Magazine, Volume 15 (15 August 1910), p. 159-160.

Showing even taller drivers than its predecessor 4-4-0s, this "bogie single" had the largest boiler ever put on a single built in Britain. "From all accounts," says Nock (RWC III, pl 109),"these engines did very well, running freely and economically." They appear to have had a virtually identical Belpaire boiler and motion to those of the three classes delivered just a few years before, but they were painted bright yellow instead of the more typical green.

Several articles in contemporary journals noted with pride that the first of the four locomotives was ready for testing in steam within 47 days of the order with others only days behind.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID2665
Number in Class4
Road Numbers
Number Built4
BuilderNorth British
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)25.17
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)48.75
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)125,552
Tender Loaded Weight (lbs / kg)95,536
Total Engine and Tender Weight (lbs / kg)221,088
Tender Water Capacity (gals / ML)4200
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 7.70
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)84 / 2134
Boiler Pressure (psi / kPa)184.20 / 12.70
High Pressure Cylinders (dia x stroke) (in / mm)18" x 26" / 457x660
Tractive Effort (lbs / kg)15,702 / 7122.32
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.25
Firebox Area (sq ft / m2)182.61
Grate Area (sq ft / m2)28 / 2.60
Evaporative Heating Surface (sq ft / m2)1650 / 153.35
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1650 / 153.35
Evaporative Heating Surface/Cylinder Volume215.47
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5158
Same as above plus superheater percentage5158
Same as above but substitute firebox area for grate area33,637
Power L18631
Power MT

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