Data from DeGolyer, Volume 60, pp. 48. See also 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 [
] (originally June 2004, last accessed 30 January 2010). Works number was 45956 in July 1917.
A lone Mikado tank supplied to the Norsk-Hoved Jernbane in the same year as three other Baldwins went to the NSB. Compared to the latter quartet, this was a much bigger locomotive with greater boiler capacity, smaller drivers, and more power. Even so, the power generation system seems small for the work. Maximum speed was 45 km/h (28 mph) and minimum curve radii were 130 metres (426 feet).
After the NHJ stud's incorporation into the NSB in 1926, this locomotive continued in service until 16 Feb 1953, when it was retired.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | Class 48a |
Locobase ID | 6193 |
Railroad | NHJ / NSB |
Country | Norway |
Whyte | 2-8-2T |
Number in Class | 1 |
Road Numbers | 99 |
Gauge | Std |
Number Built | 1 |
Builder | Baldwin |
Year | 1917 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 13.78 / 4.20 |
Engine Wheelbase (ft / m) | 28.95 / 8.82 |
Ratio of driving wheelbase to overall engine wheelbase | 0.48 |
Overall Wheelbase (engine & tender) (ft / m) | 28.95 / 8.82 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 141,000 / 63,957 |
Engine Weight (lbs / kg) | 189,500 / 85,956 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 2400 / 9.09 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.30 / 3 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 59 / 29.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 49.20 / 1250 |
Boiler Pressure (psi / kPa) | 174 / 1200 |
High Pressure Cylinders (dia x stroke) (in / mm) | 23" x 25.2" / 584x640 |
Tractive Effort (lbs / kg) | 40,074 / 18177.28 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.52 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 157 - 2" / 51 |
Flues (number - dia) (in / mm) | 24 - 5.375" / 137 |
Flue/Tube length (ft / m) | 14.25 / 4.34 |
Firebox Area (sq ft / m2) | 121 / 11.24 |
Grate Area (sq ft / m2) | 31.30 / 2.91 |
Evaporative Heating Surface (sq ft / m2) | 1763 / 163.79 |
Superheating Surface (sq ft / m2) | 392 / 36.42 |
Combined Heating Surface (sq ft / m2) | 2155 / 200.21 |
Evaporative Heating Surface/Cylinder Volume | 145.49 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 5446 |
Same as above plus superheater percentage | 6427 |
Same as above but substitute firebox area for grate area | 24,844 |
Power L1 | 6942 |
Power MT | 434.17 |