Peking Mukden 2-6-0 Locomotives in China

Class Details by Steve Llanso of Sweat House Media

Class 148 (Locobase 20556)

Data from "Superheater Mogul Locomotives: Chinese Government Rys -Peking-Mukden Line", Locomotive Magazine, Volume 23 (16 July 1917), p. 141; and "The Government Rys of North China, The Pekin-Mukden Ry", Locomotive Magazine, Volume 22 (15 September 1916), p. 187.

The Chinese Government Railways' Tongshan shops began manufacturing their own locomotives in 1910. By 1915, they had produced several engines and were manufacturing six more with road numbers 143-148. These Moguls were relatively small, but for the P-M line they were "heavy goods". Tongshan undertook a superheater installation on the last of the set and created the 148. It used the same cylinders, 11" (279 mm) piston valves, driver size, and grate.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID20556
RailroadPeking Mukden
Number in Class1
Road Numbers148
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)15 / 4.57
Engine Wheelbase (ft / m)23.25 / 7.09
Ratio of driving wheelbase to overall engine wheelbase 0.65
Overall Wheelbase (engine & tender) (ft / m)50 / 15.24
Axle Loading (Maximum Weight per Axle) (lbs / kg)37,184 / 16,866
Weight on Drivers (lbs / kg)107,072 / 48,567
Engine Weight (lbs / kg)126,112 / 57,204
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)5 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)59 / 29.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)60 / 1524
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)19" x 24" / 483x610
Tractive Effort (lbs / kg)22,093 / 10021.23
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.85
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)124 / 11.52
Grate Area (sq ft / m2)23.50 / 2.18
Evaporative Heating Surface (sq ft / m2)1311 / 121.80
Superheating Surface (sq ft / m2)231 / 21.46
Combined Heating Surface (sq ft / m2)1542 / 143.26
Evaporative Heating Surface/Cylinder Volume166.46
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4230
Same as above plus superheater percentage4865
Same as above but substitute firebox area for grate area25,668
Power L19165
Power MT566.12

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