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Soviet Railways series ИС (IS)
At the beginning of the thirties, the SŽD commissioned a locomotive for heavy passenger trains that had an axle load of 20 tonnes and a driver diameter of 1,850 mm. As wheel arrangement, 2-8-4 was chosen, which was us...
| Soviet Railways series ИС (IS)Remove | |
|---|---|
| Variant | ИС 20 |
| Built | 1932-1941 |
| Manufacturers | Kolomna;Luhansk;Ulan-Ude |
| Wheel arrangement | 1D2 |
| Gauge | 1520 mm |
| Length | |
| Service mass | 133000 kg |
| Top speed | 115 km/h |
| Power | |
| Engine |
General
| Property | Soviet Railways series ИС (IS)ИС 20 |
|---|---|
| Built | 1932-1941 |
| Manufacturers | Kolomna, Luhansk, Ulan-Ude |
| Wheel arrangement | 2-8-4 (Berkshire) |
| Gauge | 1,520 mm |
Dimensions and weights
| Property | Soviet Railways series ИС (IS)ИС 20 |
|---|---|
| Length loco | 16.37 m |
| Wheelbase | 12.61 m |
| Empty mass | 118 t |
| Service mass | 133 t |
| Adhesion mass | 80.7 t |
| Rigid wheelbase | 5.85 m |
| Axle load | 20.2 t |
| Water capacity | 33,000 l |
| Fuel capacity | 12 t (coal) |
Boiler
| Property | Soviet Railways series ИС (IS)ИС 20 |
|---|---|
| Grate area | 7.04 m² |
| Firebox surface | 31.23 m² |
| Tube heating surface | 263.93 m² |
| Evaporative heating surface | 295.16 m² |
| Superheater surface | 123.5 m² |
| Total heating surface | 418.7 m² |
Power plant
| Property | Soviet Railways series ИС (IS)ИС 20 |
|---|---|
| Driver diameter | 1,850 mm |
| Boiler pressure | 15 bar |
| Expansion type | simple expansion |
| Cylinders | two, 670 x 770 mm |
Power
| Property | Soviet Railways series ИС (IS)ИС 20 |
|---|---|
| Power source | steam |
| Indicated power | 2,355 kW (3,202 PS) |
| Top speed | 115 km/h |
| Starting effort | 238.2 kN |
Calculated values
| Property | Soviet Railways series ИС (IS)ИС 20 |
|---|---|
| Factor of adhesion | 1 : 3.32 |
| Optimal speed | 61 km/h |
| Power-to-weight ratio | 17.7 kW/t |
| Heating Surface Equivalent | 698.3 m² |
| Cylinder volume/HSE | 1 : 777.52 |
| Adhesive weight/Total | 1 : 1.65 |
| Tractive force/Heating surface | 1 : 11.88 |
| Grate area/Heating surface | 1 : 59.47 |
| Firebox/Tube surface | 1 : 8.45 |
| Total/Superheater | 1 : 2.39 |
