Data from Roy V Wright (Ed.) 1922 Locomotive Cyclopedia of American Practice, Sixth Edition (New York: Simmons-Boardman Publishing Company, 1922), 1012. Works numbers were 5993-5997 in June 1917, 5998-6004 in July, 6005-6009 in August, 6010-6012 in September, 6013-6016 in October.
Like many other African locomotives of the time, this class of Mikados burned wood. This was a big order of relatively large locomotives for this small Pittsburgh builder and were delivered just as the difficult task of building the railway was being complete. They ran on 60 lb/yard (30 kg/metre) rail laid on steel sleepers (ties). It took eight years to build the 450 miles (725 km) of road from the Zambian border to Port Francqui (later Ilepo).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 201 |
| Locobase ID | 15020 |
| Railroad | C.F. du Bas Congo a Katanga |
| Country | Congo |
| Whyte | 2-8-2 |
| Number in Class | 24 |
| Road Numbers | 201-224 |
| Gauge | 3'6" |
| Number Built | 24 |
| Builder | Porter |
| Year | 1917 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12.50 / 3.81 |
| Engine Wheelbase (ft / m) | 27 / 8.23 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.46 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 122,000 / 55,338 |
| Engine Weight (lbs / kg) | 152,000 / 68,946 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 51 / 25.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 210 / 1450 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 22" / 483x559 |
| Tractive Effort (lbs / kg) | 32,219 / 14614.31 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.79 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 120.50 / 11.19 |
| Grate Area (sq ft / m2) | 36.70 / 3.41 |
| Evaporative Heating Surface (sq ft / m2) | 2180 / 202.53 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 2180 / 202.53 |
| Evaporative Heating Surface/Cylinder Volume | 301.96 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 7707 |
| Same as above plus superheater percentage | 7707 |
| Same as above but substitute firebox area for grate area | 25,305 |
| Power L1 | 5935 |
| Power MT | 429.00 |