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New Zealand Railways classes B, B[h]A[/h] and B[h]B[/h]
The class B was a 4-8-0 freight locomotive designed for the main lines of the South Island. Starting in 1899, four were delivered by Sharp, Stewart & Co. and six more by the NZR Addington shops. They were capable of h...
| New Zealand Railways classes B, B[h]A[/h] and B[h]B[/h]Remove | |
|---|---|
| Variant | |
| Built | 1899-1903 |
| Manufacturers | Addington;Sharp, Stewart & Co. |
| Wheel arrangement | 2D |
| Gauge | 1067 mm |
| Length | 15888 mm |
| Service mass | 43588 kg |
| Top speed | 48 km/h |
| Power | |
| Engine |
General
| Property | New Zealand Railways classes B, B[h]A[/h] and B[h]B[/h]Remove |
|---|---|
| Built | 1899-1903 |
| Manufacturers | Addington, Sharp, Stewart & Co. |
| Wheel arrangement | 4-8-0 (Twelve-wheeler) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | New Zealand Railways classes B, B[h]A[/h] and B[h]B[/h]Remove |
|---|---|
| Length | 15.89 m |
| Wheelbase | 7.01 m |
| Service mass | 43.6 t |
| Adhesion mass | 32.2 t |
| Total mass | 65.9 t |
| Rigid wheelbase | 3.81 m |
| Axle load | 8.1 t |
| Water capacity | 7,730 l |
| Fuel capacity | 4.1 t (coal) |
Boiler
| Property | New Zealand Railways classes B, B[h]A[/h] and B[h]B[/h]Remove |
|---|---|
| Grate area | 1.607 m² |
| Firebox surface | 10.126 m² |
| Tube heating surface | 87.236 m² |
| Evaporative heating surface | 97.362 m² |
| Total heating surface | 97.4 m² |
Power plant
| Property | New Zealand Railways classes B, B[h]A[/h] and B[h]B[/h]Remove |
|---|---|
| Driver diameter | 1,080 mm |
| Boiler pressure | 12.1 bar |
| Expansion type | simple expansion |
| Cylinders | two, 406 x 559 mm |
Power
| Property | New Zealand Railways classes B, B[h]A[/h] and B[h]B[/h]Remove |
|---|---|
| Power source | steam |
| Estimated power | 429 kW (583 PS) |
| Top speed | 48 km/h |
| Starting effort | 87.7 kN |
Calculated values
| Property | New Zealand Railways classes B, B[h]A[/h] and B[h]B[/h]Remove |
|---|---|
| Factor of adhesion | 1 : 3.60 |
| Optimal speed | 31 km/h |
| Power-to-weight ratio | 9.8 kW/t |
| Heating Surface Equivalent | 148.0 m² |
| Cylinder volume/HSE | 1 : 979.59 |
| Adhesive weight/Total | 1 : 1.36 |
| Tractive force/Heating surface | 1 : 18.81 |
| Grate area/Heating surface | 1 : 60.59 |
| Firebox/Tube surface | 1 : 8.62 |
