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Burma Railways classes N and Ns
The class N of the Burma Railways designated 17 Mallets built by North British in four batches between 1911 and 1921. With an 0-6-6-0 wheel arrangement, they had all weight available for traction. Nevertheless, they w...
General
| Property | Burma Railways classes N and Ns Remove |
|---|---|
| Built | 1911-1915, 1921 |
| Manufacturers | North British |
| Wheel arrangement | 0-6-6-0 (Erie) |
| Gauge | 1,000 mm (Meter gauge) |
Dimensions and weights
| Property | Burma Railways classes N and Ns Remove |
|---|---|
| Length | 18.96 m |
| Wheelbase | 7.39 m |
| Rigid wheelbase | 2.52 m |
| Total wheelbase | 14.81 m |
| Service weight | 59.1 t |
| Adhesive weight | 59.1 t |
| Total weight | 90.9 t |
| Water capacity | 9,093 l |
| Fuel capacity | 6.1 t (coal) |
Boiler
| Property | Burma Railways classes N and Ns Remove |
|---|---|
| Grate area | 3.066 m² |
| Firebox surface | 10.684 m² |
| Tube heating surface | 129.879 m² |
| Evaporative heating surface | 140.562 m² |
| Total heating surface | 140.6 m² |
Power plant
| Property | Burma Railways classes N and Ns Remove |
|---|---|
| Driver diameter | 991 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | compound |
| Cylinders | four, HP: 394 x 508 mm and LP: 616 x 508 mm |
Power
| Property | Burma Railways classes N and Ns Remove |
|---|---|
| Power source | steam |
| Estimated power | 597 kW (812 PS) |
| Starting effort | 119.1 kN |
| Starting effort simple | 142.9 kN |
Calculated values
| Property | Burma Railways classes N and Ns Remove |
|---|---|
| Factor of adhesion | 1 : 4.87 |
| Optimal speed | 31 km/h |
| Power-to-weight ratio | 10.1 kW/t |
| Heating Surface Equivalent | 194.0 m² |
| Cylinder volume/HSE | 1 : 1,417.94 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 17.69 |
| Grate area/Heating surface | 1 : 45.85 |
| Firebox/Tube surface | 1 : 12.16 |
