Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 22, p. 72. Works numbers were 16526-16527 in February 1899.
This small (48.1 km/29.9 mi) narrow gauge line opened in October 1901 to link the Eidsfos Iron Works, located southwest of Oslo, to the main line farther south at Tonsberg. Originally planned for 15 kg/metre (30 lb/yard) rail, increased financing allowed an upgrade to 17.5 kg/meter (35 lb/yard) rail.
Baldwin delivered these two locomotives in time to participate in the line's construction. Once it opened, the TEB proved a hit with tourists who traveled between Oslo and Tonsberg. Reasonably successful for about 20 years, the line suffered from post-World War One inflation in costs and no substantial increase in revenue.
The TEB eventually closed in 1928.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Tonsberg |
| Locobase ID | 20342 |
| Railroad | Tonsberg-Eidsfos |
| Country | Norway |
| Whyte | 2-4-2T |
| Number in Class | 2 |
| Road Numbers | |
| Gauge | 3'6" |
| Number Built | 2 |
| Builder | Burnham, Williams & Co |
| Year | 1899 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5 / 1.52 |
| Engine Wheelbase (ft / m) | 17.67 / 5.39 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.28 |
| Overall Wheelbase (engine & tender) (ft / m) | 17.67 / 5.39 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 26,000 / 11,793 |
| Engine Weight (lbs / kg) | 42,000 / 19,051 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 500 / 1.89 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 22 / 11 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 45 / 1143 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 10" x 16" / 254x406 |
| Tractive Effort (lbs / kg) | 4836 / 2193.58 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.38 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 82 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 8.17 / 2.49 |
| Firebox Area (sq ft / m2) | 45.60 / 4.24 |
| Grate Area (sq ft / m2) | 7 / 0.65 |
| Evaporative Heating Surface (sq ft / m2) | 305 / 28.34 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 305 / 28.34 |
| Evaporative Heating Surface/Cylinder Volume | 209.70 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1120 |
| Same as above plus superheater percentage | 1120 |
| Same as above but substitute firebox area for grate area | 7296 |
| Power L1 | 4398 |
| Power MT | 745.84 |