Data from "CGR Type A 2-6-4T" in Wikipedia at [], last accessed 3 August 2023. Works numbers were 1564-1565 in September 1902.
Unusual "Adriatic" wheel arrangement in a pair of tank locomotives bought to serve the new Avontuur Railway which ran west-northwest from Port Elizabeth's Homewood Road to the namesake termination
Renumbered NG25-NG26, the pair satisfied traffic demands until the SAR retired them in 1929.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | A/NG25 |
| Locobase ID | 987 |
| Railroad | Cape Government (SAR) |
| Country | South Africa |
| Whyte | 2-6-4T |
| Number in Class | 2 |
| Road Numbers | 31-32/NG25-NG26 |
| Gauge | 2' |
| Number Built | 2 |
| Builder | Manning Wardle |
| Year | 1902 |
| Valve Gear | |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 6 |
| Engine Wheelbase (ft / m) | 20.75 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.29 |
| Overall Wheelbase (engine & tender) (ft / m) | 20.75 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 18,704 |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 91,952 / 41,709 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1200 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.20 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 33 / 838 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13" x 16" / 330x406 |
| Tractive Effort (lbs / kg) | 12,537 / 5686.69 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 12 |
| Evaporative Heating Surface (sq ft / m2) | |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | |
| Evaporative Heating Surface/Cylinder Volume | |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2160 |
| Same as above plus superheater percentage | 2160 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |