Peking Hankow 2-6-2 "Prairie" Locomotives of 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.

Specifications by Steve Llanso of Sweat House Media
Locobase ID10975
RailroadPeking Hankow
Number in Class30
Road Numbers511-540
Number Built30
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase13.83'
Engine Wheelbase31.58'
Ratio of driving wheelbase to overall engine wheebase 0.44
Overall Wheelbase (engine & tender)53.85'
Axle Loading (Maximum Weight per Axle)33060 lbs
Weight on Drivers99000 lbs
Engine Weight155000 lbs
Tender Light Weight92500 lbs
Total Engine and Tender Weight247500 lbs
Tender Water Capacity4800 gals
Tender Fuel Capacity (oil/coal)7 tons
Minimum weight of rail (calculated)55 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter59"
Boiler Pressure170 psi
Cylinders (dia x stroke)20" x 26"
Tractive Effort25471 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.89
Heating Ability
Firebox Area183 sq. ft
Grate Area31.50 sq. ft
Evaporative Heating Surface1618 sq. ft
Superheating Surface371 sq. ft
Combined Heating Surface1989 sq. ft
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 area37021
Power L110383
Power MT693.65

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