Sung-Wu 2-4-2 Locomotives in China


Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 2891)

Data from Catalogue Descriptive of Simple and Compound Locomotives built by Brooks Locomotive Works, Dunkirk, NY (Buffalo, NY: Matthew-Northrup Company, 1899). See also "Passenger Tank Locomotive", Engineering News, Volume 38 (9 September 1897), p. 175. Builder info from

B.Rumary, 25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND and Jeremy Lambert as supplied by Allen Stanley in March 2004. Works #2769-2771 (June 1897).

A compact standard-gauge tank engine with considerable overhang at each end. One can only imagine that this engine was not particularly steady on the track. The EN report noted that the tanks were quite short while the coal bunker was at the very back.

Principal Dimensions by Steve Llanso of Middle Run Media
Classunknown
Locobase ID2891
RailroadSung-Wu
CountryChina
Whyte2-4-2T
Number in Class3
Road Numbers1-3
GaugeStd
Number Built3
BuilderBrooks
Year1897
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.50 / 2.29
Engine Wheelbase (ft / m)20 / 6.10
Ratio of driving wheelbase to overall engine wheelbase 0.38
Overall Wheelbase (engine & tender) (ft / m)20 / 6.10
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)59,000 / 26,762
Engine Weight (lbs / kg)112,800 / 51,165
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)112,800 / 51,165
Tender Water Capacity (gals / ML)1360 / 5.15
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)2 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)49 / 24.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)62.60 / 1590
Boiler Pressure (psi / kPa)165.30 / 1140
High Pressure Cylinders (dia x stroke) (in / mm)16.54" x 23.62" / 420x600
Tractive Effort (lbs / kg)14,503 / 6578.46
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.07
Heating Ability
Tubes (number - dia) (in / mm)165 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.10 / 3.38
Firebox Area (sq ft / m2)93.82 / 8.72
Grate Area (sq ft / m2)17.90 / 1.66
Evaporative Heating Surface (sq ft / m2)1051 / 97.64
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1051 / 97.64
Evaporative Heating Surface/Cylinder Volume178.93
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2959
Same as above plus superheater percentage2959
Same as above but substitute firebox area for grate area15,508
Power L14463
Power MT333.53

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