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Midland classes 115 and 2601
After the Midland Railway had already procured 70 examples of express locomotives in the 4-2-2 wheel arrangement in the late 1880s, the era of express locomotives without a second coupled axle was already considered o...
General
| Property | Midland classes 115 and 2601 Remove |
|---|---|
| Built | 1899 |
| Manufacturers | Derby |
| Wheel arrangement | 4-2-2 (Single) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Midland classes 115 and 2601 Remove |
|---|---|
| Wheelbase | 6.68 m |
| Rigid wheelbase | 2.67 m |
| Service weight | 51 t |
| Adhesive weight | 18.8 t |
| Axle load | 18.8 t |
| Total weight | 73.6 t |
| Water capacity | 15,910 l |
| Fuel capacity | 4.1 t (coal) |
Boiler
| Property | Midland classes 115 and 2601 Remove |
|---|---|
| Grate area | 2.28 m² |
| Firebox surface | 13.66 m² |
| Tube heating surface | 99.403 m² |
| Evaporative heating surface | 113.063 m² |
| Total heating surface | 113.1 m² |
Power plant
| Property | Midland classes 115 and 2601 Remove |
|---|---|
| Driver diameter | 2,375 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 495 x 660 mm |
Power
| Property | Midland classes 115 and 2601 Remove |
|---|---|
| Power source | steam |
| Estimated power | 597 kW (812 PS) |
| Top speed | 145 km/h |
| Starting effort | 72.0 kN |
Calculated values
| Property | Midland classes 115 and 2601 Remove |
|---|---|
| Factor of adhesion | 1 : 2.56 |
| Optimal speed | 51 km/h |
| Power-to-weight ratio | 11.7 kW/t |
| Heating Surface Equivalent | 181.4 m² |
| Cylinder volume/HSE | 1 : 1,403.18 |
| Adhesive weight/Total | 1 : 2.71 |
| Tractive force/Heating surface | 1 : 13.29 |
| Grate area/Heating surface | 1 : 49.59 |
| Firebox/Tube surface | 1 : 7.28 |
