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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...
| Midland classes 115 and 2601Remove | |
|---|---|
| Variant | |
| Built | 1896-1897, 1899 |
| Manufacturers | Derby |
| Wheel arrangement | 2A1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 47881 kg |
| Top speed | 145 km/h |
| Power | |
| Engine |
General
| Property | Midland classes 115 and 2601Remove |
|---|---|
| Built | 1896-1897, 1899 |
| Manufacturers | Derby |
| Wheel arrangement | 4-2-2 (Single) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Midland classes 115 and 2601Remove |
|---|---|
| Wheelbase | 6.68 m |
| Service mass | 47.9 t |
| Adhesion mass | 18.8 t |
| Total mass | 89.5 t |
| Rigid wheelbase | 2.67 m |
| Axle load | 18.8 t |
| Water capacity | 15,910 l |
| Fuel capacity | 4.1 t (coal) |
Boiler
| Property | Midland classes 115 and 2601Remove |
|---|---|
| Grate area | 1.979 m² |
| Firebox surface | 11.892 m² |
| Tube heating surface | 102.658 m² |
| Evaporative heating surface | 114.55 m² |
| Total heating surface | 114.6 m² |
Power plant
| Property | Midland classes 115 and 2601Remove |
|---|---|
| Driver diameter | 2,362 mm |
| Boiler pressure | 11.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 495 x 660 mm |
Power
| Property | Midland classes 115 and 2601Remove |
|---|---|
| Power source | steam |
| Estimated power | 559 kW (760 PS) |
| Top speed | 145 km/h |
| Starting effort | 68.3 kN |
Calculated values
| Property | Midland classes 115 and 2601Remove |
|---|---|
| Factor of adhesion | 1 : 2.70 |
| Optimal speed | 50 km/h |
| Power-to-weight ratio | 11.7 kW/t |
| Heating Surface Equivalent | 174.0 m² |
| Cylinder volume/HSE | 1 : 1,462.48 |
| Adhesive weight/Total | 1 : 2.55 |
| Tractive force/Heating surface | 1 : 12.46 |
| Grate area/Heating surface | 1 : 57.88 |
| Firebox/Tube surface | 1 : 8.63 |
