Data from DeGolyer, Volume 60, pp. 3, See also "Nesttun-Os Line" in Wikipedia at [], last accessed 16 January 2026. Works number was 45287 in March 1917.
Baldwin delivered this all-adhesion eight-coupled tank to the Nesttun Os for its extremely narrow-gauge system. Wikipedia explains its constricted nature as a means avoiding having bore any tunnels. Its ruling grade rose at 2% and its maximum allowable speed was 25 km (16 mph).
After years of deliberation and false starts, the Os Municipality settled on a railway between Osoyro and Nesttun in 1885. It opened in 1894. Given the alternatives for moving goods and people from Os to, say, Oslo or Bergen, Wikipedia's summation gives the long-sought 26.3 km (16.3 miles) railway its due:"The railway was of vast importance for the Os community, as it allowed for day trips to Bergen. The rail trip took only two hours, and was considerably faster and cheaper than travel by steam ship."
Alas, like many such late-steam lines, its success proved short-lived as Norway began building roads and truck began using them . The Nestun OsBahn closed in 1935.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Stend |
| Locobase ID | 14383 |
| Railroad | Nesttun-Osbanen |
| Country | Norway |
| Whyte | 0-8-0T |
| Number in Class | 1 |
| Road Numbers | 4 |
| Gauge | 75 cm |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1917 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9 / 2.74 |
| Engine Wheelbase (ft / m) | 9 / 2.74 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 9 / 2.74 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 44,000 / 19,958 |
| Engine Weight (lbs / kg) | 44,000 / 19,958 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 450 / 1.70 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 18 / 9 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 24.24 / 616 |
| Boiler Pressure (psi / kPa) | 170 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 12" / 279x305 |
| Tractive Effort (lbs / kg) | 8656 / 3926.30 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.08 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 65 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9 / 2.74 |
| Firebox Area (sq ft / m2) | 41 / 3.81 |
| Grate Area (sq ft / m2) | 5.10 / 0.47 |
| Evaporative Heating Surface (sq ft / m2) | 345 / 32.05 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 345 / 32.05 |
| Evaporative Heating Surface/Cylinder Volume | 261.38 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 867 |
| Same as above plus superheater percentage | 867 |
| Same as above but substitute firebox area for grate area | 6970 |
| Power L1 | 2862 |
| Power MT | 573.60 |