NHJ / NSB 4-6-0 Locomotives in Norway
Class Details by Steve Llanso of Sweat House Media
Class Class 45a (Locobase 6184)
Data from Svein Sando's Railway Site [
] (9 June 2004)--(Later link: The Semaphore, accessed for link update 10 July 2022.)-- nd the Jernbane (Iron Road) site [] (originally June 2004, last accessed 30 January 2010).
Thune delivered 1-3 and Hamar produced 4 & 5 -- delivery dates were 1911, 1914, and 1919.
Four remained in service until 18 December 1959.
Class Class 46a (Locobase 6185)
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 h [] (originally June 2004, last accessed 30 January 2010). See also DeGolyer, Volume 60, pp 28+. Works numbers were 52456-52457 in November 1919.
Slightly larger than the Thune/Hamars that became NSB Class 45a (Locobase 6184), this pair arrived in the same year as the last of that class. Steam admission to the cylinders came through 9 1/2" (240 mm) piston valves.
15 retired last, being withdrawn on 26 June 1954.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | Class 45a | Class 46a |
| Locobase ID | 6184 | 6185 |
| Railroad | NHJ / NSB | NHJ / NSB |
| Country | Norway | Norway |
| Whyte | 4-6-0 | 4-6-0 |
| Number in Class | 5 | 2 |
| Road Numbers | 1-5 | 15-16 |
| Gauge | Std | Std |
| Number Built | 5 | 2 |
| Builder | several | Baldwin |
| Year | 1911 | 1919 |
| Valve Gear | Walschaert | Walschaert |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | / 4.20 | 12.50 / 3.81 |
| Engine Wheelbase (ft / m) | / 8.65 | 24.74 / 7.54 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.51 | |
| Overall Wheelbase (engine & tender) (ft / m) | 45.11 / 15.28 | 45.18 / 13.77 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 88,626 / 40,200 | 88,626 / 40,200 |
| Engine Weight (lbs / kg) | 130,514 / 59,200 | 131,836 / 59,800 |
| Tender Loaded Weight (lbs / kg) | 71,430 / 32,400 | 69,886 / 31,700 |
| Total Engine and Tender Weight (lbs / kg) | 201,944 / 91,600 | 201,722 / 91,500 |
| Tender Water Capacity (gals / ML) | 3432 / 13 | 3432 / 13 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.90 / 4 | 3.90 / 3.50 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 49 / 24.50 | 49 / 24.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 62.20 / 1580 | 63 / 1600 |
| Boiler Pressure (psi / kPa) | 174 / 1200 | 169.70 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20.47" x 24.41" / 520x620 | 22.05" x 23.62" / 560x600 |
| Tractive Effort (lbs / kg) | 24,321 / 11031.83 | 26,294 / 11926.77 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.64 | 3.37 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 146 - 1.89" / 48 | |
| Flues (number - dia) (in / mm) | 24 - 5" / 127 | |
| Flue/Tube length (ft / m) | / 4.24 | 12.50 / 3.81 |
| Firebox Area (sq ft / m2) | 141.01 / 13.10 | |
| Grate Area (sq ft / m2) | 22.60 / 2.10 | 26.37 / 2.45 |
| Evaporative Heating Surface (sq ft / m2) | 1164 / 108.20 | 1420 / 131.92 |
| Superheating Surface (sq ft / m2) | 396 / 36.80 | 343 / 31.87 |
| Combined Heating Surface (sq ft / m2) | 1560 / 145 | 1763 / 163.79 |
| Evaporative Heating Surface/Cylinder Volume | 125.19 | 136.02 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 3932 | 4475 |
| Same as above plus superheater percentage | 4916 | 5325 |
| Same as above but substitute firebox area for grate area | 28,476 | |
| Power L1 | 8896 | |
| Power MT | 663.88 | |