Data from DeGolyer, Vol 79, pp. 550+. Works number was 60657 in October 1928.
The PPC began as a single plant on the outskirts of Pretoria in 1888 when Transvaal Republic president Paul Kruger granted the concession. After the English gained control in South Africa following the Boer War, the Eerste Cement Fabrieken Beperkt changed its name to the First Portland Cement Factory Limited in 1902 and to Pretoria Portland Cement Company in 1908.
This Mikado tank's operating conditions included bi-directional running on "track that is practically straight, having three bends of large radius." It was to share as many components as possible with the two Coronation Colliery 4-8-2Ts shown in Locobase 5406. The specs give a long list of items on page 552 of Vol 79 that are to be duplicated or at least be similar to the second of the two Mountain tanks.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 15467 |
| Railroad | Pretoria Portland Cement Company |
| Country | South Africa |
| Whyte | 2-8-2T |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | 3'6" |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1928 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11 / 3.35 |
| Engine Wheelbase (ft / m) | 25.58 / 7.80 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.43 |
| Overall Wheelbase (engine & tender) (ft / m) | 25.58 / 7.80 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 92,000 / 41,731 |
| Engine Weight (lbs / kg) | 116,000 / 52,617 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 2000 / 7.58 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.50 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 38 / 19 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 40 / 1016 |
| Boiler Pressure (psi / kPa) | 190 / 1310 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 |
| Tractive Effort (lbs / kg) | 20,672 / 9376.67 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.45 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 135 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.50 / 3.51 |
| Firebox Area (sq ft / m2) | 90 / 8.36 |
| Grate Area (sq ft / m2) | 15.70 / 1.46 |
| Evaporative Heating Surface (sq ft / m2) | 897 / 83.33 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 897 / 83.33 |
| Evaporative Heating Surface/Cylinder Volume | 192.73 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2983 |
| Same as above plus superheater percentage | 2983 |
| Same as above but substitute firebox area for grate area | 17,100 |
| Power L1 | 3666 |
| Power MT | 351.40 |