Indian Railways classes XG and XG/M
The XG was a 0-8-0 shunter in the IRS program that was designed by Messrs. Rendel, Palmer & Tritton for the North Western Railway. Only three were built by Beyer, Peacock & Co. in 1928 for hump shunting which were numbered 911 to 913. It seems like their axle load of nearly 23 tons was too high for other yards, but even the lighter XF 0-8-0 was only ordered six times.
To reduce their axle load, the Mughalpura shops rebuilt them to 2-8-2 locomotives in 1943 and designated them XG/M. After that, the rear driving axle had the highest load with only 18 tons and 19 cwt. With their small drivers of only 4 feet and 3 inches, it is likely that they were still used as shunters after the rebuild. Today 911 is still existing and on display in the National Railway Museum at New Delhi.
Technical data
General
| Property | XG | rebuilt XG/M |
|---|---|---|
| Built | 1928 | 1943 |
| Manufacturers | Beyer, Peacock & Co. | Mughalpura |
| Wheel arrangement | 0-8-0 (Eight-coupled) | 2-8-2 (Mikado) |
| Gauge | 1,676 mm (Indian broad gauge) | |
Dimensions and weights
| Property | XG | rebuilt XG/M |
|---|---|---|
| Wheelbase | 4.62 m | 9.12 m |
| Service mass | 92.5 t | 99.9 t |
| Adhesion mass | 92.5 t | 72.1 t |
| Rigid wheelbase | 4.62 m | |
| Axle load | 23.1 t | 19.3 t |
| Water capacity | 20,456 l | |
| Fuel capacity | 8.1 t (coal) | |
| Total wheelbase | 18.14 m | |
| Total mass | 163.8 t | |
Boiler
| Property | XG | rebuilt XG/M |
|---|---|---|
| Grate area | 3.855 m² | |
| Firebox surface | 17.28 m² | |
| Tube heating surface | 210.611 m² | |
| Evaporative heating surface | 227.891 m² | |
| Superheater surface | 56.206 m² | |
| Total heating surface | 284.1 m² | |
Power plant
| Property | XG | rebuilt XG/M |
|---|---|---|
| Driver diameter | 1,295 mm | |
| Boiler pressure | 12.4 bar | |
| Expansion type | simple expansion | |
| Cylinders | two, 597 x 711 mm | |
Power
| Property | XG | rebuilt XG/M |
|---|---|---|
| Power source | steam | |
| Starting effort | 206.3 kN | |
Calculated values
| Property | XG | rebuilt XG/M |
|---|---|---|
| Factor of adhesion | 1 : 4.40 | 1 : 3.43 |
| Heating Surface Equivalent | 426.7 m² | |
| Cylinder volume/HSE | 1 : 932.80 | |
| Adhesive weight/Total | 1 : 1.00 | 1 : 1.39 |
| Tractive force/Heating surface | 1 : 15.17 | |
| Grate area/Heating surface | 1 : 73.70 | |
| Firebox/Tube surface | 1 : 12.19 | |
| Total/Superheater | 1 : 4.05 | |
