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New Zealand Railways class K (1932)
Since the three class G Garratts procured in 1928 could not convince due to various problems, a new, powerful locomotive for heavy passenger and freight trains was needed for the mountainous North Island Main Trunk Ra...
| New Zealand Railways class K (1932)Remove | |
|---|---|
| Variant | |
| Built | 1932-1936 |
| Manufacturers | Hutt |
| Wheel arrangement | 2D2 |
| Gauge | 1067 mm |
| Length | 21234 mm |
| Service mass | 88091 kg |
| Top speed | 105 km/h |
| Power | |
| Engine |
General
| Property | New Zealand Railways class K (1932)Remove |
|---|---|
| Built | 1932-1936 |
| Manufacturers | Hutt |
| Wheel arrangement | 4-8-4 (Northern) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | New Zealand Railways class K (1932)Remove |
|---|---|
| Length | 21.23 m |
| Wheelbase | 10.62 m |
| Total wheelbase | 18.86 m |
| Service mass | 88.1 t |
| Adhesion mass | 56.2 t |
| Total mass | 136.9 t |
| Rigid wheelbase | 4.34 m |
| Axle load | 14 t |
| Water capacity | 22,731 l |
| Fuel capacity | 7.9 t (coal) |
Boiler
| Property | New Zealand Railways class K (1932)Remove |
|---|---|
| Grate area | 4.431 m² |
| Firebox surface | 17.652 m² |
| Tube heating surface | 160.908 m² |
| Evaporative heating surface | 178.56 m² |
| Superheater surface | 39.763 m² |
| Total heating surface | 218.3 m² |
Power plant
| Property | New Zealand Railways class K (1932)Remove |
|---|---|
| Driver diameter | 1,372 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 508 x 660 mm |
Power
| Property | New Zealand Railways class K (1932)Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,119 kW (1,521 PS) |
| Top speed | 105 km/h |
| Starting effort | 145.6 kN |
Calculated values
| Property | New Zealand Railways class K (1932)Remove |
|---|---|
| Factor of adhesion | 1 : 3.78 |
| Optimal speed | 47 km/h |
| Power-to-weight ratio | 12.7 kW/t |
| Heating Surface Equivalent | 346.3 m² |
| Cylinder volume/HSE | 1 : 772.94 |
| Adhesive weight/Total | 1 : 1.57 |
| Tractive force/Heating surface | 1 : 13.93 |
| Grate area/Heating surface | 1 : 49.27 |
| Firebox/Tube surface | 1 : 9.12 |
| Total/Superheater | 1 : 4.49 |
