Data from "Shire Highlands Railway (Nyasaland) 4-8-0 Locomotive", Locomotive Magazine, Volume 18 (15 August 1912), pp. 168-169.
Very small drivers indicate just what a severe profile this, particularly as the railway began its 1 in 44 (2.3%) climb from 12 miles beyond Chiromo. For the next 52 miles, the alignment featured one curve after another. Twelve-wheeler had to negotiate. Its Belpaire firebox's cross-section flared out above the inside plate frames. See Locobase 15935 for a later batch of identical locomotives produced by Hawthorn Leslie for the Trans-Zambesi.
Principal Dimensions by Steve Llanso of Sweat House Media | |
|---|---|
| Class | unknown |
| Locobase ID | 20071 |
| Railroad | Shire Highlands |
| Country | Nyasaland |
| Whyte | 4-8-0 |
| Number in Class | 2 |
| Road Numbers | 22 |
| Gauge | 3'6" |
| Number Built | 2 |
| Builder | Hunslet Engine Co |
| Year | 1912 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12 / 3.66 |
| Engine Wheelbase (ft / m) | 21.33 / 6.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.56 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 105,000 / 47,627 |
| Tender Loaded Weight (lbs / kg) | 70,000 / 31,752 |
| Total Engine and Tender Weight (lbs / kg) | 175,000 / 79,379 |
| Tender Water Capacity (gals / ML) | 3600 / 13.64 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 40.50 / 1029 |
| Boiler Pressure (psi / kPa) | 160 / 11 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 21" / 457x533 |
| Tractive Effort (lbs / kg) | 22,848 / 10363.69 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 112 - 1.875" / 48 |
| Flues (number - dia) (in / mm) | 18 - 5.25" / 133 |
| Flue/Tube length (ft / m) | 10.75 / 3.28 |
| Firebox Area (sq ft / m2) | 112 / 10.41 |
| Grate Area (sq ft / m2) | 17.50 / 1.63 |
| Evaporative Heating Surface (sq ft / m2) | 971 / 90.21 |
| Superheating Surface (sq ft / m2) | 210 / 19.51 |
| Combined Heating Surface (sq ft / m2) | 1181 / 109.72 |
| Evaporative Heating Surface/Cylinder Volume | 156.99 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2800 |
| Same as above plus superheater percentage | 3304 |
| Same as above but substitute firebox area for grate area | 21,146 |
| Power L1 | 5974 |
| Power MT | |