Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 60, pp. 222. See also "'Prairie' Switching Locomotives for the Peking-Suiyuan Railway, China", Journal of the Association of Chinese & American Engineers, Volume 3, No 7 (August 1922), pp. 22-23. Works numbers were 53688-53689, 53714-53718, 53757-53759 in September 1920.
This was the renamed Peking-Kalgan that now included an extension to Suiyuan. At the time of this order, the railway had reached Fengchen, about 260 miles (419 km) from Peking. and about 100 miles (161 km) from Suiyuan. The Journal pointed out that this line "was constructed entirely with Chinese capital and by Chinese Engineers [sic], having been originally conceived by Dr. Chan Tien-Yu, better known to foreigners as Jeme Tien-Yu."
"Locomotives of this type," said the Journal, "are peculiarly adapted for switching, general utility and construction service." The account noted the "self-contained" nature of this saddle tank, its short wheelbase and flexible front and rear trucks, made the engine "safe to operate in either direction on light rails and over short radius curves."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 58 |
| Locobase ID | 14641 |
| Railroad | Peking-Suiyuan |
| Country | China |
| Whyte | 2-6-2ST |
| Number in Class | 10 |
| Road Numbers | 58-67 |
| Gauge | Std |
| Number Built | 10 |
| Builder | Baldwin |
| Year | 1920 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10 / 3.05 |
| Engine Wheelbase (ft / m) | 25.75 / 7.85 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.39 |
| Overall Wheelbase (engine & tender) (ft / m) | 25.75 / 7.85 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 87,000 / 39,463 |
| Engine Weight (lbs / kg) | 111,000 / 50,349 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 111,000 / 50,349 |
| Tender Water Capacity (gals / ML) | 1600 / 6.06 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 48 / 24 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 21,364 / 9690.56 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.07 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 152 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.54 / 4.13 |
| Firebox Area (sq ft / m2) | 90 / 8.36 |
| Grate Area (sq ft / m2) | 14.40 / 1.34 |
| Evaporative Heating Surface (sq ft / m2) | 1161 / 107.86 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1161 / 107.86 |
| Evaporative Heating Surface/Cylinder Volume | 207.88 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2592 |
| Same as above plus superheater percentage | 2592 |
| Same as above but substitute firebox area for grate area | 16,200 |
| Power L1 | 3808 |
| Power MT | 289.49 |