Peking Hankow 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 511 (Locobase 10975)

Data from "Prairie Type (2-6-2) Locomotives Built for the Peking-Hankow Railway China," The Weekly Review of the Far East, Vol XX, No 8 (22 April 1922), pp. 306, 308. See also DeGolyer, Volume 60, pp. 229+. Works numbers were 54718-54740 in April 1921 and 54753-54761, 54778-54782, 54788-54801 in May 1921.

In addition to the basic equipment, the China Weekly Review's report notes the extras: "Westinghouse airbrakes, Nathan simplex No. 8 type K. injectors, Nathan five feed Bull's Eye lubricators, Coale safety valves, 18" round case headlights fitted with Pyle National type K-2 ' incandescent electric equipment and Janney M. C. B. automatic couplers." Ten-inch (254 mm) piston valves served the cylinders. Firebox heating surface area included 56 sq ft (5.2 sq m) in the combustion chamber and 15 sq ft (1.4 sq m) of arch tubes.

These were the latest Prairies to be built for this railway. Compared to North American 2-6-2s, the design was small and low-drivered.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID10,975
RailroadPeking Hankow
Number in Class30
Road Numbers511-540
Number Built30
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.83 / 4.22
Engine Wheelbase (ft / m)31.58 / 9.63
Ratio of driving wheelbase to overall engine wheebase 0.44
Overall Wheelbase (engine & tender) (ft / m)53.85 / 16.41
Axle Loading (Maximum Weight per Axle) (lbs / kg)33,060 / 14,996
Weight on Drivers (lbs / kg)99,000 / 44,906
Engine Weight (lbs / kg)155,000 / 70,307
Tender Loaded Weight (lbs / kg)92,500 / 41,957
Total Engine and Tender Weight (lbs / kg)247,500 / 112,264
Tender Water Capacity (gals / ML)4800 / 18.18
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)7 / 6.40
Minimum weight of rail (calculated) (lb/yd / kg/m)55 / 27.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)59 / 1499
Boiler Pressure (psi / kPa)170 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)20" x 26" / 508x660
Tractive Effort (lbs / kg)25,471 / 11553.46
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.89
Heating Ability
Firebox Area (sq ft / m2)183 / 17
Grate Area (sq ft / m2)31.50 / 2.93
Evaporative Heating Surface (sq ft / m2)1618 / 150.32
Superheating Surface (sq ft / m2)371 / 34.47
Combined Heating Surface (sq ft / m2)1989 / 184.79
Evaporative Heating Surface/Cylinder Volume171.15
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5355
Same as above plus superheater percentage6372
Same as above but substitute firebox area for grate area37,021
Power L110,383
Power MT693.65

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Wes Barris