Data from DeGolyer, Vol 72, pp. 267. Works numbers were 57408, 57415-57419 in November 1923.
Unusually arranged passenger tanks engines, these locomotives had two side tanks that held a total of 475 US gallons (1,798 litres) and a rear tank with a 400-gallon (1,514 litres) capacity. The equalizing pipe from the side to the rear tank extended through the cab to prevent freezing.
The Tien-Tu light railway had been authorized to extend from the Tumen River on the Korean Border to the Tienpaoshan gold mines. Its construction had only extended to Laotoukou when this class was ordered.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 8 |
| Locobase ID | 15287 |
| Railroad | Tien Tu Light Railway Company |
| Country | China |
| Whyte | 0-6-4T |
| Number in Class | 6 |
| Road Numbers | 8-13 |
| Gauge | 2'6" |
| Number Built | 6 |
| Builder | Baldwin |
| Year | 1923 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.75 / 1.75 |
| Engine Wheelbase (ft / m) | 16 / 4.88 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.36 |
| Overall Wheelbase (engine & tender) (ft / m) | 16 / 4.88 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 33,000 / 14,969 |
| Engine Weight (lbs / kg) | 48,000 / 21,772 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 48,000 / 21,772 |
| Tender Water Capacity (gals / ML) | 875 / 3.31 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.25 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 18 / 9 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 30 / 762 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 10" x 16" / 254x406 |
| Tractive Effort (lbs / kg) | 8160 / 3701.32 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.04 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 72 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9 / 2.74 |
| Firebox Area (sq ft / m2) | 40 / 3.72 |
| Grate Area (sq ft / m2) | 10.10 / 0.94 |
| Evaporative Heating Surface (sq ft / m2) | 376 / 34.93 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 376 / 34.93 |
| Evaporative Heating Surface/Cylinder Volume | 258.52 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1818 |
| Same as above plus superheater percentage | 1818 |
| Same as above but substitute firebox area for grate area | 7200 |
| Power L1 | 3564 |
| Power MT | 714.30 |