Data from "442 Passenger Locomotive with Tender--Soudan [sic] Government Railway", Robert Stephenson & Co catalogue (1922), last accessed in Flickr's Historical Railway Images 29 December 2024. See also Roger Farnworth's extensive commentary and photo research at[], last accessed 29 December 2024. Works numbers were 3383-3386 in 1910.
This pocket Atlantic-type locomotive quartet joined a very limited number of 4-4-2 express passenger locomotives rolling on the metre gauge. Obeying the inherent size limitations of the narrow gauge, they presented similar cylinder volumes, heating surface areas, and driver diameters as the others. A Belpaire firebox heated the boiler water. The cylinder rods extended well forward of the front cover.
HRI's image files shows the 112 ready to depart with the Wadi Halfa (on the northern border) to Khartoum express, which consisted that day of nine carriages.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 110 |
| Locobase ID | 21238 |
| Railroad | Sudan Railway |
| Country | Sudan |
| Whyte | 4-4-2 |
| Number in Class | 4 |
| Road Numbers | 113 |
| Gauge | 3'6" |
| Number Built | 4 |
| Builder | Robert Stephenson & Co |
| Year | 1910 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 4.58 / 1.40 |
| Engine Wheelbase (ft / m) | 16.75 / 5.11 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.27 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 68,880 / 31,243 |
| Engine Weight (lbs / kg) | 119,392 / 54,155 |
| Tender Loaded Weight (lbs / kg) | 73,360 / 33,276 |
| Total Engine and Tender Weight (lbs / kg) | 192,752 / 87,431 |
| Tender Water Capacity (gals / ML) | 5490 / 20.80 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 10.40 / 9.50 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 57 / 28.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 62.50 / 1588 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 26" / 457x660 |
| Tractive Effort (lbs / kg) | 20,622 / 9353.99 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.34 |
| 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) | 24.75 / 2.30 |
| Evaporative Heating Surface (sq ft / m2) | 1518 / 141.03 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1518 / 141.03 |
| Evaporative Heating Surface/Cylinder Volume | 198.23 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4455 |
| Same as above plus superheater percentage | 4455 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |