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Norwegian State Railways type 31
When the Bergen Railway was converted for higher axle loads , more powerful locomotives than the type 26 could be used there. This resulted in the type 31 with the same axle arrangement, but with a higher weight and b...
| Norwegian State Railways type 31Remove | |
|---|---|
| Variant | |
| Built | 1915-1926 |
| Manufacturers | Thunes;NoHAB;Norsk Maskin Industri;Breda;Hamar Jernstøberi |
| Wheel arrangement | 2D |
| Gauge | 1435 mm |
| Length | 18660 mm |
| Service mass | 80000 kg |
| Top speed | 70 km/h |
| Power | |
| Engine |
General
| Property | Norwegian State Railways type 31Remove |
|---|---|
| Built | 1915-1926 |
| Manufacturers | Thunes, NoHAB, Norsk Maskin Industri, Breda, Hamar Jernstøberi |
| Wheel arrangement | 4-8-0 (Twelve-wheeler) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Norwegian State Railways type 31Remove |
|---|---|
| Length | 18.66 m |
| Wheelbase | 8.48 m |
| Total wheelbase | 15.73 m |
| Empty mass | 71.1 t |
| Service mass | 80 t |
| Adhesion mass | 57.6 t |
| Total mass | 123.2 t |
| Rigid wheelbase | 5.03 m |
| Axle load | 14.5 t |
| Water capacity | 20,000 l |
| Fuel capacity | 5 t (coal) |
Boiler
| Property | Norwegian State Railways type 31Remove |
|---|---|
| Grate area | 3 m² |
| Firebox surface | 11.9 m² |
| Tube heating surface | 199.7 m² |
| Evaporative heating surface | 211.6 m² |
| Total heating surface | 211.6 m² |
Power plant
| Property | Norwegian State Railways type 31Remove |
|---|---|
| Driver diameter | 1,349 mm |
| Boiler pressure | 12.8 bar |
| Expansion type | compound |
| Cylinders | four, HP: 420 x 600 mm and LP: 630 x 600 mm |
Power
| Property | Norwegian State Railways type 31Remove |
|---|---|
| Power source | steam |
| Estimated power | 750 kW (1,020 PS) |
| Top speed | 70 km/h |
| Starting effort | 118.2 kN |
| Starting effort simple | 141.8 kN |
Calculated values
| Property | Norwegian State Railways type 31Remove |
|---|---|
| Factor of adhesion | 1 : 4.78 |
| Optimal speed | 39 km/h |
| Power-to-weight ratio | 9.4 kW/t |
| Heating Surface Equivalent | 271.1 m² |
| Cylinder volume/HSE | 1 : 1,303.16 |
| Adhesive weight/Total | 1 : 1.39 |
| Tractive force/Heating surface | 1 : 11.67 |
| Grate area/Heating surface | 1 : 70.53 |
| Firebox/Tube surface | 1 : 16.78 |
