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New Zealand Railways class N
The class N was introduced in a time when more and more American locomotives were built for the NZR, as the American designs were generally lighter and more flexible than the British ones. The N was a 2-6-2 that was i...
| New Zealand Railways class NRemove | |
|---|---|
| Variant | 1901 variant |
| Built | 1901 |
| Manufacturers | Baldwin |
| Wheel arrangement | 1C1 |
| Gauge | 1067 mm |
| Length | 15291 mm |
| Service mass | 31665 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | New Zealand Railways class N1901 variant |
|---|---|
| Built | 1901 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2-6-2 (Prairie) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | New Zealand Railways class N1901 variant |
|---|---|
| Length | 15.29 m |
| Wheelbase | 6.73 m |
| Total wheelbase | 12.48 m |
| Service mass | 31.7 t |
| Adhesion mass | 22.8 t |
| Total mass | 49.9 t |
| Rigid wheelbase | 2.90 m |
| Axle load | 7.8 t |
| Water capacity | 22,731 l |
| Fuel capacity | 7.6 t (coal) |
Boiler
| Property | New Zealand Railways class N1901 variant |
|---|---|
| Grate area | 1.486 m² |
| Firebox surface | 7.618 m² |
| Tube heating surface | 74.508 m² |
| Evaporative heating surface | 82.126 m² |
| Total heating surface | 82.1 m² |
Power plant
| Property | New Zealand Railways class N1901 variant |
|---|---|
| Driver diameter | 1,245 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 381 x 508 mm |
Power
| Property | New Zealand Railways class N1901 variant |
|---|---|
| Power source | steam |
| Estimated power | 298 kW (405 PS) |
| Starting effort | 69.4 kN |
Calculated values
| Property | New Zealand Railways class N1901 variant |
|---|---|
| Factor of adhesion | 1 : 3.22 |
| Optimal speed | 26 km/h |
| Power-to-weight ratio | 9.4 kW/t |
| Heating Surface Equivalent | 120.2 m² |
| Cylinder volume/HSE | 1 : 963.54 |
| Adhesive weight/Total | 1 : 1.39 |
| Tractive force/Heating surface | 1 : 17.66 |
| Grate area/Heating surface | 1 : 55.27 |
| Firebox/Tube surface | 1 : 9.78 |
