Data from "Recent Superheater Locomotives for Swedish Railways," Locomotive Magazine, Volume XVIII [18] (14 December 1912), pp. 253-254.
This pair of American-type Eight-wheelers served the railway that headed south from Stockholm into Gotland and the port of Nynashamn some 60 km (37 miles) away.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 20067 |
| Railroad | Stockholm-Nynaes (SNJ) |
| Country | Sweden |
| Whyte | 4-4-0 |
| Number in Class | 2 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 2 |
| Builder | Motala |
| Year | 1910 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8.20 / 2.50 |
| Engine Wheelbase (ft / m) | 23.62 / 7.20 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | 44.01 / 13.41 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 64,959 / 29,465 |
| Engine Weight (lbs / kg) | 104,168 / 47,250 |
| Tender Loaded Weight (lbs / kg) | 75,067 / 34,050 |
| Total Engine and Tender Weight (lbs / kg) | 179,235 / 81,300 |
| Tender Water Capacity (gals / ML) | 3194 / 12.10 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4.80 / 4 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 54 / 27 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 70.90 / 1800 |
| Boiler Pressure (psi / kPa) | 156.60 / 1080 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19.69" x 23.62" / 500x600 |
| Tractive Effort (lbs / kg) | 17,192 / 7798.17 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.78 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 100.11 / 9.30 |
| Grate Area (sq ft / m2) | 21.53 / 2 |
| Evaporative Heating Surface (sq ft / m2) | 1076 / 100 |
| Superheating Surface (sq ft / m2) | 307 / 28.50 |
| Combined Heating Surface (sq ft / m2) | 1383 / 128.50 |
| Evaporative Heating Surface/Cylinder Volume | 129.26 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3372 |
| Same as above plus superheater percentage | 4113 |
| Same as above but substitute firebox area for grate area | 19,126 |
| Power L1 | 9647 |
| Power MT | 654.81 |