Chinese Government Railways 4-4-2 Locomotives in China

Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 2667)

Data from "Atlantic-Type Express Locomotive for the Chinese Government Railways", Engineering (30 August 1912), p. 223 and "Chinese Government Rys, Atlantic Type Express Locomotive," Locomotive Magazine, Volume 18, No 241 (14 September 1912), p.179.

Said by OS Nock (RWC IV, pl 107) to have been among the ten most handsome locomotive designs ever exported from Great Britain, these Belpaire-boilered express engines are a matter of taste, one supposes. The boiler is pitched high, with a lot of air showing above the splashers, the capped stack and small cylinders seem undersized, and a Belpaire firebox never conferred smooth lines on a boiler. Still, the large piston valves inside simplified the look and the engines reportedly ran freely on the Taokow-Chingua line.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID2667
RailroadChinese Government Railways
Number in Class
Road Numbers
Number Built
BuilderKerr, Stuart & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.50 / 1.98
Engine Wheelbase (ft / m)28.92 / 8.81
Ratio of driving wheelbase to overall engine wheelbase 0.22
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)85,120 / 38,610
Engine Weight (lbs / kg)159,824 / 72,495
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)5100 / 19.32
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 8.80 / 8
Minimum weight of rail (calculated) (lb/yd / kg/m)71 / 35.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)72 / 1829
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)19" x 24" / 483x610
Tractive Effort (lbs / kg)18,411 / 8351.10
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.62
Heating Ability
Tubes (number - dia) (in / mm)193 - 2.25" / 57
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)16.23 / 4.95
Firebox Area (sq ft / m2)132.35 / 12.30
Grate Area (sq ft / m2)35 / 3.25
Evaporative Heating Surface (sq ft / m2)1976 / 183.57
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1976 / 183.57
Evaporative Heating Surface/Cylinder Volume250.90
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6300
Same as above plus superheater percentage6300
Same as above but substitute firebox area for grate area23,823
Power L17234
Power MT374.72

All material Copyright ©
Wes Barris