Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 60, pp. 111. Works numbers were 52592-52594 in November 1919; 52619-52622, 52652-52655, 52680 in December.
Most freight haulers of this size and heating power (i.e. superheated) used a leading truck and were called Consolidations. But the South Manchurian bought these dozen eight-coupleds as all-adhesion engines, a British preference in keeping with the left-hand running positon of the engineer.
They had 11" (279 mm) piston valves and their considerable firebox heating surface included 21 sq ft (1.95 sq m) of arch tubes. The coal burned in these furnaces was non-caking bituminous (lignite, really) with a low "calorific power" of 7,000 btu/lb; such a fuel required a large grate.
The class rolled on 80 lb/yard (40 kg/metre) rail and needed to negotiate relatively lenient curve radii as tight at 450 feet (137 metres) or 12 3/4 degrees. Cab furnishings gave a nod to the bitterly cold winters when they included double-pane windows all around.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 300 |
| Locobase ID | 14615 |
| Railroad | South Manchurian |
| Country | China |
| Whyte | 0-8-0 |
| Number in Class | 12 |
| Road Numbers | 300-311 |
| Gauge | Std |
| Number Built | 12 |
| Builder | Baldwin |
| Year | 1919 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 15 / 4.57 |
| Engine Wheelbase (ft / m) | 15 / 4.57 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 43.99 / 13.41 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 45,000 / 20,412 |
| Weight on Drivers (lbs / kg) | 165,000 / 74,843 |
| Engine Weight (lbs / kg) | 165,000 / 74,843 |
| Tender Loaded Weight (lbs / kg) | 80,000 / 36,287 |
| Total Engine and Tender Weight (lbs / kg) | 245,000 / 111,130 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8 / 7 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 69 / 34.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 54 / 1372 |
| Boiler Pressure (psi / kPa) | 175 / 1210 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 22" x 26" / 559x660 |
| Tractive Effort (lbs / kg) | 34,664 / 15723.34 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.76 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 144 - 2" / 51 |
| Flues (number - dia) (in / mm) | 22 - 5.5" / 140 |
| Flue/Tube length (ft / m) | 15 / 4.57 |
| Firebox Area (sq ft / m2) | 159 / 14.77 |
| Grate Area (sq ft / m2) | 40 / 3.72 |
| Evaporative Heating Surface (sq ft / m2) | 1756 / 163.14 |
| Superheating Surface (sq ft / m2) | 403 / 37.44 |
| Combined Heating Surface (sq ft / m2) | 2159 / 200.58 |
| Evaporative Heating Surface/Cylinder Volume | 153.51 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 7000 |
| Same as above plus superheater percentage | 8330 |
| Same as above but substitute firebox area for grate area | 33,112 |
| Power L1 | 8506 |
| Power MT | 454.61 |