Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 22, p.66. See also Foreign Office of Great Britain, China , No 7, Correspondence respecting the Imperial Railway of North China (London: Harrison & Sons, 1901), page 99 et seq. Works numbers were 16535-16546 in February 1899.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 58 |
| Locobase ID | 12336 |
| Railroad | Imperial Railways of North China/Peking-Mukden |
| Country | China |
| Whyte | 2-6-0 |
| Number in Class | 12 |
| Road Numbers | 58-69 |
| Gauge | Std |
| Number Built | 12 |
| Builder | Burnham, Williams & Co |
| Year | 1899 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13 / 3.96 |
| Engine Wheelbase (ft / m) | 21.08 / 6.43 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.62 |
| Overall Wheelbase (engine & tender) (ft / m) | 47.19 / 14.38 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 29,120 / 13,209 |
| Weight on Drivers (lbs / kg) | 82,000 / 37,195 |
| Engine Weight (lbs / kg) | 94,500 / 42,865 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 4320 / 16.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 46 / 23 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 54 / 1372 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 17,408 / 7896.15 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.71 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 159 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12 / 3.66 |
| Firebox Area (sq ft / m2) | 98.60 / 9.16 |
| Grate Area (sq ft / m2) | 20 / 1.86 |
| Evaporative Heating Surface (sq ft / m2) | 1021 / 94.89 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1021 / 94.89 |
| Evaporative Heating Surface/Cylinder Volume | 182.81 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3600 |
| Same as above plus superheater percentage | 3600 |
| Same as above but substitute firebox area for grate area | 17,748 |
| Power L1 | 4392 |
| Power MT | 354.24 |