Data from:
Svein Sando's Railway Site [] (9 June 2004)--(Later link: The Semaphore, accessed for link update 10 July 2022.)-- and the Jernbane (Iron Road) site [] (June 2004).
Built originally for the NHJ (the Norwegian Trunk Line) which was opened between Oslo (then Christiana) and Eidsvold on 1 Sept 1854. When the NSB took over the NHJ in 1926, this cross-compound was brought in as Type 41. The original 3-axle tender was replaced by a 2-axle tender of greater capacity. Seems a little late in the day to be buying 2-4-0s, but the duo filled a need because the last wasn't retired until 7 July 1953.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Class 41 |
| Locobase ID | 6180 |
| Railroad | NHJ / NSB |
| Country | Norway |
| Whyte | 2-4-0 |
| Number in Class | 2 |
| Road Numbers | 93-94 |
| Gauge | Std |
| Number Built | 2 |
| Builder | SLM |
| Year | 1901 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | / 10.86 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 35.63 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 58,643 / 26,600 |
| Engine Weight (lbs / kg) | 78,925 / 35,800 |
| Tender Loaded Weight (lbs / kg) | 54,234 / 24,600 |
| Total Engine and Tender Weight (lbs / kg) | 133,159 / 60,400 |
| Tender Water Capacity (gals / ML) | 2640 / 10 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.30 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 49 / 24.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 57 / 1448 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.75" x 24.41" / 400x620 (1) |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 22.83" x 24.41" / 580x620 (1) |
| Tractive Effort (lbs / kg) | 10,645 / 4828.50 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.51 |
| 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) | 16.46 / 1.53 |
| Evaporative Heating Surface (sq ft / m2) | 986 / 91.60 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 986 / 91.60 |
| Evaporative Heating Surface/Cylinder Volume | 358.26 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2864 |
| Same as above plus superheater percentage | 2864 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |