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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...
| Burma Railways classes N and NsRemove | |
|---|---|
| Variant | |
| Built | 1924 |
| Manufacturers | Beardmore |
| Wheel arrangement | CC ma |
| Gauge | 1000 mm |
| Length | 18961 mm |
| Service mass | 61471 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Burma Railways classes N and NsRemove |
|---|---|
| Built | 1924 |
| Manufacturers | Beardmore |
| Wheel arrangement | 0-6-6-0 (Erie) |
| Gauge | 1,000 mm |
Dimensions and weights
| Property | Burma Railways classes N and NsRemove |
|---|---|
| Length | 18.96 m |
| Wheelbase | 7.39 m |
| Total wheelbase | 14.81 m |
| Service mass | 61.5 t |
| Adhesion mass | 61.5 t |
| Total mass | 159.4 t |
| Rigid wheelbase | 2.52 m |
| Fuel capacity | 11.2 t (coal) |
Boiler
| Property | Burma Railways classes N and NsRemove |
|---|---|
| Grate area | 3.066 m² |
| Firebox surface | 10.684 m² |
| Tube heating surface | 99.499 m² |
| Evaporative heating surface | 100.521 m² |
| Superheater surface | 28.707 m² |
| Total heating surface | 129.2 m² |
Power plant
| Property | Burma Railways classes N and NsRemove |
|---|---|
| Driver diameter | 991 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | compound |
| Cylinders | four, HP: 406 x 508 mm and LP: 616 x 508 mm |
Power
| Property | Burma Railways classes N and NsRemove |
|---|---|
| Power source | steam |
| Estimated power | 746 kW (1,014 PS) |
| Starting effort | 124.5 kN |
| Starting effort simple | 149.4 kN |
Calculated values
| Property | Burma Railways classes N and NsRemove |
|---|---|
| Factor of adhesion | 1 : 4.84 |
| Optimal speed | 37 km/h |
| Power-to-weight ratio | 12.1 kW/t |
| Heating Surface Equivalent | 221.0 m² |
| Cylinder volume/HSE | 1 : 1,281.19 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 20.12 |
| Grate area/Heating surface | 1 : 42.15 |
| Firebox/Tube surface | 1 : 9.31 |
| Total/Superheater | 1 : 3.50 |
