Data from DeGolyer, Volume 60, pp. 236. Works numbers were 52477, 52525-52526, 52560-52561 in November 1919; 55036, 55047-55050 in September 1921.
Using the same boiler and firebox as the one provided to the PMR Mikados shown in Locobase 14645, Baldwin stretched the tube bundle another foot to confer more heating surface for these Pacifics. In addition, raising the boiler pressure 20 psi partially compensated for the taller drivers and smaller amount of cylinder volume. Like the Mikes, these engines used 11" (279 mm) piston valves.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 190 |
| Locobase ID | 14642 |
| Railroad | Peking-Mukden |
| Country | China |
| Whyte | 4-6-2 |
| Number in Class | 10 |
| Road Numbers | 190-199 |
| Gauge | Std |
| Number Built | 10 |
| Builder | Baldwin |
| Year | 1919 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.67 / 3.56 |
| Engine Wheelbase (ft / m) | 31.75 / 9.68 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.37 |
| Overall Wheelbase (engine & tender) (ft / m) | 59.75 / 18.21 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 35,840 / 16,257 |
| Weight on Drivers (lbs / kg) | 108,000 / 48,988 |
| Engine Weight (lbs / kg) | 180,000 / 81,647 |
| Tender Loaded Weight (lbs / kg) | 115,000 / 52,163 |
| Total Engine and Tender Weight (lbs / kg) | 295,000 / 133,810 |
| Tender Water Capacity (gals / ML) | 6000 / 22.73 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 9.50 / 9 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 60 / 30 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 66 / 1676 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 26" / 508x660 |
| Tractive Effort (lbs / kg) | 26,788 / 12150.85 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.03 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 172 - 2" / 51 |
| Flues (number - dia) (in / mm) | 24 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 19 / 5.79 |
| Firebox Area (sq ft / m2) | 146 / 13.56 |
| Grate Area (sq ft / m2) | 41.40 / 3.85 |
| Evaporative Heating Surface (sq ft / m2) | 2489 / 231.23 |
| Superheating Surface (sq ft / m2) | 559 / 51.93 |
| Combined Heating Surface (sq ft / m2) | 3048 / 283.16 |
| Evaporative Heating Surface/Cylinder Volume | 263.28 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 8280 |
| Same as above plus superheater percentage | 9770 |
| Same as above but substitute firebox area for grate area | 34,456 |
| Power L1 | 19,198 |
| Power MT | 1175.67 |