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Norwegian State Railways type 49 “Dovregubben”
The NSB had the largest and most powerful steam locomotives ever used in Norway built to operate the increasingly heavier express trains on the steeply graded Dovre Railway. They became known by the nickname “Dovregub...
| Norwegian State Railways type 49 “Dovregubben”Remove | |
|---|---|
| Variant | |
| Built | 1935 |
| Manufacturers | Hamar Jernstøberi;Thunes |
| Wheel arrangement | 1D2 |
| Gauge | 1435 mm |
| Length | 22000 mm |
| Service mass | 98500 kg |
| Top speed | 90 km/h |
| Power | |
| Engine |
General
| Property | Norwegian State Railways type 49 “Dovregubben”Remove |
|---|---|
| Built | 1935 |
| Manufacturers | Hamar Jernstøberi, Thunes |
| Wheel arrangement | 2-8-4 (Berkshire) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Norwegian State Railways type 49 “Dovregubben”Remove |
|---|---|
| Length | 22.00 m |
| Total wheelbase | 18.43 m |
| Empty mass | 87.2 t |
| Service mass | 98.5 t |
| Adhesion mass | 62.4 t |
| Total mass | 151.5 t |
| Rigid wheelbase | 3.36 m |
| Axle load | 15.5 t |
| Water capacity | 27,200 l |
| Fuel capacity | 8.4 t (coal) |
Boiler
| Property | Norwegian State Railways type 49 “Dovregubben”Remove |
|---|---|
| Grate area | 5 m² |
| Firebox surface | 21.5 m² |
| Tube heating surface | 234.5 m² |
| Evaporative heating surface | 256 m² |
| Superheater surface | 102 m² |
| Total heating surface | 358.0 m² |
Power plant
| Property | Norwegian State Railways type 49 “Dovregubben”Remove |
|---|---|
| Driver diameter | 1,530 mm |
| Boiler pressure | 17 bar |
| Expansion type | compound |
| Cylinders | four, HP: 465 x 650 mm and LP: 720 x 700 mm |
Power
| Property | Norwegian State Railways type 49 “Dovregubben”Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,912 kW (2,600 PS) |
| Top speed | 90 km/h |
| Starting effort | 191.4 kN |
| Starting effort simple | 229.6 kN |
Calculated values
| Property | Norwegian State Railways type 49 “Dovregubben”Remove |
|---|---|
| Factor of adhesion | 1 : 3.20 |
| Optimal speed | 61 km/h |
| Power-to-weight ratio | 19.4 kW/t |
| Heating Surface Equivalent | 567.5 m² |
| Cylinder volume/HSE | 1 : 891.23 |
| Adhesive weight/Total | 1 : 1.58 |
| Tractive force/Heating surface | 1 : 11.16 |
| Grate area/Heating surface | 1 : 71.60 |
| Firebox/Tube surface | 1 : 10.91 |
| Total/Superheater | 1 : 2.51 |
