Data from Howell, Comparative Statistics of the Australasian Railways, Journal of the Royal Statistical Society, March 1899, pp. 96-97.
As the Perth area's suburbs blossomed following the Gold Rush in Western Australia, these passenger tank engines served not just Perth, but also the gold center of Kalgoorlie. Several of the N class began service as O-class heavy freight engines; see Locobase 9565.
They proved to be a durable class and most operated into the 1950s with the last retiring in 1961.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | N |
| Locobase ID | 9564 |
| Railroad | Western Australia |
| Country | Australia |
| Whyte | 4-4-4T |
| Number in Class | 42 |
| Road Numbers | |
| Gauge | 3'6" |
| Number Built | 42 |
| Builder | Neilson & Co |
| Year | 1896 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 99,008 / 44,909 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1920 / 7.27 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.80 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.5" x 21" / 394x533 |
| Tractive Effort (lbs / kg) | 14,295 / 6484.11 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 93 / 8.64 |
| Grate Area (sq ft / m2) | 15.75 / 1.46 |
| Evaporative Heating Surface (sq ft / m2) | 867 / 80.58 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 867 / 80.58 |
| Evaporative Heating Surface/Cylinder Volume | 189.04 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2520 |
| Same as above plus superheater percentage | 2520 |
| Same as above but substitute firebox area for grate area | 14,880 |
| Power L1 | 3718 |
| Power MT | |
