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Japanese Government Railways class 8620
The class 8620 was the first mass-produced passenger locomotive in Japan. With the wheel arrangement 2-6-0 and the same boiler as the 4-4-0 class 6760, it was mainly intended for regular passenger trains with its high...
General
| Property | Japanese Government Railways class 8620Remove |
|---|---|
| Built | 1914-1929 |
| Manufacturers | Mitsubishi, Hitachi, Nippon Sharyō, Kawasaki, Kisha Seizō |
| Wheel arrangement | 2-6-0 (Mogul) |
| Gauge | 1,067 mm (Cape gauge) |
Dimensions and weights
| Property | Japanese Government Railways class 8620Remove |
|---|---|
| Length | 16.77 m |
| Wheelbase | 7.01 m |
| Rigid wheelbase | 2.29 m |
| Total wheelbase | 14.31 m |
| Service weight | 46.3 t |
| Adhesive weight | 39.3 t |
| Axle load | 13.5 t |
| Total weight | 81 t |
Boiler
| Property | Japanese Government Railways class 8620Remove |
|---|---|
| Grate area | 1.63 m² |
| Firebox surface | 10.13 m² |
| Tube heating surface | 78.68 m² |
| Evaporative heating surface | 88.81 m² |
| Superheater surface | 27.5 m² |
| Total heating surface | 116.3 m² |
Power plant
| Property | Japanese Government Railways class 8620Remove |
|---|---|
| Driver diameter | 1,600 mm |
| Boiler pressure | 12.5 bar |
| Expansion type | simple expansion |
| Cylinders | two, 470 x 610 mm |
Power
| Property | Japanese Government Railways class 8620Remove |
|---|---|
| Power source | steam |
| Indicated power | 558 kW (759 PS) |
| Top speed | 90 km/h |
| Starting effort | 89.5 kN |
Calculated values
| Property | Japanese Government Railways class 8620Remove |
|---|---|
| Factor of adhesion | 1 : 4.30 |
| Optimal speed | 39 km/h |
| Power-to-weight ratio | 12.1 kW/t |
| Heating Surface Equivalent | 194.5 m² |
| Cylinder volume/HSE | 1 : 1,088.47 |
| Adhesive weight/Total | 1 : 1.18 |
| Tractive force/Heating surface | 1 : 16.07 |
| Grate area/Heating surface | 1 : 71.36 |
| Firebox/Tube surface | 1 : 7.77 |
| Total/Superheater | 1 : 3.23 |
