Nyasaland & Trans-Zambesi 2-8-2 Locomotives in Zambia
Class Details by Steve Llanso of Sweat House Media
Class G (Locobase 6368)
[
], a reprint of the Vulcan magazine for Spring 1957.
Based on the Nigerian River class Mikados, these had 2" more stroke and greater heating surfaces. The Belpaire firebox's heating surface area included 17 sq ft of arch tubes.
NB: Tube length is an estimate based on the calculation of tube surface area by subtracting reported firebox heating surface from reported total evaporative heating surface
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | G |
| Locobase ID | 6368 |
| Railroad | Nyasaland & Trans-Zambesi |
| Country | Zambia |
| Whyte | 2-8-2 |
| Number in Class | 4 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 4 |
| Builder | Vulcan Foundry |
| Year | 1956 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 29,120 / 13,209 |
| Weight on Drivers (lbs / kg) | 114,716 / 52,034 |
| Engine Weight (lbs / kg) | 162,372 / 73,651 |
| Tender Loaded Weight (lbs / kg) | 110,544 / 50,142 |
| Total Engine and Tender Weight (lbs / kg) | 272,916 / 123,793 |
| Tender Water Capacity (gals / ML) | 4800 / 18.18 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 11.20 / 10 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 48 / 24 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 26" / 457x660 |
| Tractive Effort (lbs / kg) | 29,835 / 13532.94 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.85 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 123 - 2" / 51 |
| Flues (number - dia) (in / mm) | 28 - 5.25" / 133 |
| Flue/Tube length (ft / m) | 16.75 / 5.11 |
| Firebox Area (sq ft / m2) | 163 / 15.15 |
| Grate Area (sq ft / m2) | 38 / 3.53 |
| Evaporative Heating Surface (sq ft / m2) | 1878 / 174.54 |
| Superheating Surface (sq ft / m2) | 489 / 45.45 |
| Combined Heating Surface (sq ft / m2) | 2367 / 219.99 |
| Evaporative Heating Surface/Cylinder Volume | 245.25 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 7600 |
| Same as above plus superheater percentage | 9196 |
| Same as above but substitute firebox area for grate area | 39,446 |
| Power L1 | 14,822 |
| Power MT | 1139.40 |