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New Zealand Railways class R
Double Fairlies were used on the winding and steep lines in New Zealand as early as 1872. From 1878 Avonside also manufactured Single Fairlies, which were easier to maintain with a single, larger boiler and a single d...
| New Zealand Railways class RRemove | |
|---|---|
| Variant | as built |
| Built | 1878-1879 |
| Manufacturers | Avonside |
| Wheel arrangement | C2 t sf |
| Gauge | 1067 mm |
| Length | |
| Service mass | 30481 kg |
| Top speed | 85 km/h |
| Power | |
| Engine |
General
| Property | New Zealand Railways class Ras built |
|---|---|
| Built | 1878-1879 |
| Manufacturers | Avonside |
| Wheel arrangement | 0-6-4T (Single Fairlie) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | New Zealand Railways class Ras built |
|---|---|
| Wheelbase | 6.66 m |
| Service mass | 30.5 t |
| Adhesion mass | 17.3 t |
| Rigid wheelbase | 2.06 m |
| Axle load | 5.8 t |
| Water capacity | 3,255 l |
Boiler
| Property | New Zealand Railways class Ras built |
|---|---|
| Grate area | 1.115 m² |
| Evaporative heating surface | 56.485 m² |
| Total heating surface | 56.5 m² |
Power plant
| Property | New Zealand Railways class Ras built |
|---|---|
| Driver diameter | 914 mm |
| Boiler pressure | 9 bar |
| Expansion type | simple expansion |
| Cylinders | two, 311 x 406 mm |
Power
| Property | New Zealand Railways class Ras built |
|---|---|
| Power source | steam |
| Estimated power | 205 kW (279 PS) |
| Top speed | 85 km/h |
| Starting effort | 32.8 kN |
Calculated values
| Property | New Zealand Railways class Ras built |
|---|---|
| Factor of adhesion | 1 : 5.17 |
| Optimal speed | 39 km/h |
| Power-to-weight ratio | 6.7 kW/t |
| Adhesive weight/Total | 1 : 1.76 |
| Tractive force/Heating surface | 1 : 12.12 |
| Grate area/Heating surface | 1 : 50.66 |
