Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 60, pp. 161. Works numbers were 41994-41995 in April 1915.
This pair of Prairie tanks were bought for the Tung Yu by Arnhold, Karberg & Company. The Tung Yu Railway was intended to bring coal from Chinchow to the port of Hulutao. Chinchow lay on the Peking-Mukden Railroad, in Liaoning Province in northeast China.
Specifications called for each of the pair to "To haul 400 gross [long] tons of cars and l% grade, 9,000 feet [2.75 km] long at 15 miles per hour [24 kph] provided journal friction deos not exceed 9 pounds per gross ton." The design was simple, using Richardson balanced slide valves, a plain firebox, and no superheater.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 14628 |
| Railroad | Tung Yu Mining Company |
| Country | China |
| Whyte | 2-6-2T |
| Number in Class | 2 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1915 |
| 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) | 96,000 / 43,545 |
| Engine Weight (lbs / kg) | 122,000 / 55,338 |
| 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) | 53 / 26.50 |
| 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) | 4.49 |
| 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 | 302.86 |