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Japanese National Railways class D60
In order to reduce the axle load of the trailing axle of the D50 class with a 2-8-2 wheel arrangement, a two-axle bogie was installed in its place from 1951. Along with other modifications, the D60 class was created. ...
General
| Property | Japanese National Railways class D60Remove |
|---|---|
| Built | 1951-1956 |
| Manufacturers | Hamamatsu |
| Wheel arrangement | 2-8-4 (Berkshire) |
| Gauge | 1,067 mm (Cape gauge) |
Dimensions and weights
| Property | Japanese National Railways class D60Remove |
|---|---|
| Length | 20.03 m |
| Wheelbase | 10.25 m |
| Rigid wheelbase | 4.71 m |
| Total wheelbase | 17.27 m |
| Service weight | 81.6 t |
| Adhesive weight | 54.7 t |
| Axle load | 13.7 t |
| Total weight | 130.6 t |
| Water capacity | 17,000 l |
| Fuel capacity | 12 t (coal) |
Boiler
| Property | Japanese National Railways class D60Remove |
|---|---|
| Grate area | 3.25 m² |
| Firebox surface | 15.2 m² |
| Tube heating surface | 121.9 m² |
| Evaporative heating surface | 137.1 m² |
| Superheater surface | 75.2 m² |
| Total heating surface | 212.3 m² |
Power plant
| Property | Japanese National Railways class D60Remove |
|---|---|
| Driver diameter | 1,400 mm |
| Boiler pressure | 12.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 550 x 660 mm |
Power
| Property | Japanese National Railways class D60Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,050 kW (1,428 PS) |
| Top speed | 70 km/h |
| Starting effort | 155.2 kN |
Calculated values
| Property | Japanese National Railways class D60Remove |
|---|---|
| Factor of adhesion | 1 : 3.46 |
| Optimal speed | 42 km/h |
| Power-to-weight ratio | 12.9 kW/t |
| Heating Surface Equivalent | 363.5 m² |
| Cylinder volume/HSE | 1 : 862.75 |
| Adhesive weight/Total | 1 : 1.49 |
| Tractive force/Heating surface | 1 : 15.26 |
| Grate area/Heating surface | 1 : 65.32 |
| Firebox/Tube surface | 1 : 8.02 |
| Total/Superheater | 1 : 1.82 |
