Data from [] holding of Baldwin narrow-gauge export locomotives (visited 22 Feb 2003). See also DeGolyer, Vol 78, pp. 427+ and Vol 79, pp. 557+. Works number was 58850 in November 1925 and 60009 in May 1927.
This Mountain tank looks like a smaller edition of the North Natal Navigation Collieries Santa Fe tank profiled in Locobase 3249. Maximum grade on Vryheid's 60 lb/yard (30 kg/metre) rail was 1.67% and minimum curve radii was 300 feet (91.4 metres) or 19.1 degrees. The radial valve gear actuated 8" (203 mm) piston valves.
2 eventually served Coronation-Amalgamated's joint venture Blesbok Colliery in Mpumalanga after it opened in 1948 at the coal seam just south of Witbank and east of Pretoria.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 1 |
| Locobase ID | 5406 |
| Railroad | Vryheid Coronation, Ltd |
| Country | South Africa |
| Whyte | 4-8-2T |
| Number in Class | |
| Road Numbers | 1-2 |
| Gauge | 3'6" |
| Number Built | |
| Builder | Baldwin |
| Year | 1925 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.50 / 3.51 |
| Engine Wheelbase (ft / m) | 28.25 / 8.61 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.41 |
| Overall Wheelbase (engine & tender) (ft / m) | 28.25 / 8.61 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 120,100 / 54,477 |
| Engine Weight (lbs / kg) | 168,100 / 76,249 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 2200 / 8.33 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 50 / 25 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 190 / 1310 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 22" / 457x559 |
| Tractive Effort (lbs / kg) | 27,409 / 12432.53 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.38 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 239 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 14 / 4.27 |
| Firebox Area (sq ft / m2) | 105 / 9.75 |
| Grate Area (sq ft / m2) | 30.20 / 2.81 |
| Evaporative Heating Surface (sq ft / m2) | 1857 / 172.52 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1857 / 172.52 |
| Evaporative Heating Surface/Cylinder Volume | 286.59 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5738 |
| Same as above plus superheater percentage | 5738 |
| Same as above but substitute firebox area for grate area | 19,950 |
| Power L1 | 4889 |
| Power MT | 358.98 |