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 Middle Run Media | |
|---|---|
| Class | 148 |
| Locobase ID | 20556 |
| Railroad | Peking Mukden |
| Country | China |
| Whyte | 2-6-0 |
| Number in Class | 1 |
| Road Numbers | 148 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Tongshan |
| Year | 1916 |
| Valve Gear | Walschaert |
| 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 / 1240 |
| 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 Volume | 166.46 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4230 |
| Same as above plus superheater percentage | 4865 |
| Same as above but substitute firebox area for grate area | 25,668 |
| Power L1 | 9165 |
| Power MT | 566.12 |