Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 60, pp. 152. (Thanks to Ivo Rutishauser for his email correcting the road numbers for this pair.) Works numbers were 52527-52528 in October 1919.
To manufacture this order, Eddystone took the 1915 Prairie tank design supplied to the Yu Tung Mining Company (Locobase 14628) and duplicated the specifications.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 3 |
| Locobase ID | 14624 |
| Railroad | Hupeh Government Mining Bureau |
| Country | China |
| Whyte | 2-6-2T |
| Number in Class | 2 |
| Road Numbers | 3-4 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1919 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9.33 / 2.84 |
| Engine Wheelbase (ft / m) | 25.75 / 7.85 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.36 |
| Overall Wheelbase (engine & tender) (ft / m) | 25.75 / 7.85 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 96,500 / 43,772 |
| Engine Weight (lbs / kg) | 122,500 / 55,565 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1600 / 6.06 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.50 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 54 / 27 |
| 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) | 4.52 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 194 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.67 / 4.17 |
| Firebox Area (sq ft / m2) | 80 / 7.43 |
| Grate Area (sq ft / m2) | 21 / 1.95 |
| Evaporative Heating Surface (sq ft / m2) | 1460 / 135.64 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1460 / 135.64 |
| Evaporative Heating Surface/Cylinder Volume | 261.41 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3780 |
| Same as above plus superheater percentage | 3780 |
| Same as above but substitute firebox area for grate area | 14,400 |
| Power L1 | 4396 |
| Power MT | 301.29 |