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Indian Railways class XB
The XB was one of several Pacific and Mikado locomotives designed in the Indian Railway Standard (IRS) programme for use in all India. Loosely based on the BESA principles, it had modern features and was built to serv...
| Indian Railways class XBRemove | |
|---|---|
| Variant | Standard |
| Built | 1927-1936 |
| Manufacturers | Vulcan Foundry;Armstrong Whitworth;North British |
| Wheel arrangement | 2C1 |
| Gauge | 1676 mm |
| Length | |
| Service mass | 91698 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Indian Railways class XB Standard Remove |
|---|---|
| Built | 1927-1936 |
| Manufacturers | Vulcan Foundry, Armstrong Whitworth, North British |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,676 mm |
Dimensions and weights
| Property | Indian Railways class XB Standard Remove |
|---|---|
| Wheelbase | 10.24 m |
| Total wheelbase | 20.31 m |
| Service mass | 91.7 t |
| Adhesion mass | 51.8 t |
| Total mass | 157.7 t |
| Rigid wheelbase | 4.01 m |
| Axle load | 17.3 t |
| Water capacity | 20,456 l |
| Fuel capacity | 10.2 t (coal) |
Boiler
| Property | Indian Railways class XB Standard Remove |
|---|---|
| Grate area | 4.181 m² |
| Firebox surface | 18.395 m² |
| Tube heating surface | 152.547 m² |
| Evaporative heating surface | 170.942 m² |
| Superheater surface | 43.014 m² |
| Total heating surface | 214.0 m² |
Power plant
| Property | Indian Railways class XB Standard Remove |
|---|---|
| Driver diameter | 1,880 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 546 x 711 mm |
Power
| Property | Indian Railways class XB Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 969 kW (1,317 PS) |
| Starting effort | 119.0 kN |
Calculated values
| Property | Indian Railways class XB Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.27 |
| Optimal speed | 50 km/h |
| Power-to-weight ratio | 10.6 kW/t |
| Heating Surface Equivalent | 348.9 m² |
| Cylinder volume/HSE | 1 : 954.77 |
| Adhesive weight/Total | 1 : 1.77 |
| Tractive force/Heating surface | 1 : 11.62 |
| Grate area/Heating surface | 1 : 51.17 |
| Firebox/Tube surface | 1 : 8.29 |
| Total/Superheater | 1 : 3.97 |
