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Nippon Tetsudō Bt4/6
These 20 2-8-2 locomotives, which were delivered by Baldwin to the Nippon Railway in 1897, gave this wheel arrangement the name “Mikado”. Their manufacturer called them type 12-30 1/4 E, while their designation on the...
| Nippon Tetsudō Bt4/6Remove | |
|---|---|
| Variant | Standard |
| Built | 1897 |
| Manufacturers | Baldwin |
| Wheel arrangement | 1D1 |
| Gauge | 1067 mm |
| Length | 17272 mm |
| Service mass | 55112 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Nippon Tetsudō Bt4/6 Standard Remove |
|---|---|
| Built | 1897 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2-8-2 (Mikado) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | Nippon Tetsudō Bt4/6 Standard Remove |
|---|---|
| Length | 17.27 m |
| Wheelbase | 7.47 m |
| Total wheelbase | 14.48 m |
| Service mass | 55.1 t |
| Adhesion mass | 48.8 t |
| Total mass | 82.3 t |
| Rigid wheelbase | 3.61 m |
| Axle load | 12.2 t |
| Water capacity | 11,356 l |
| Fuel capacity | 5.4 t (coal) |
Boiler
| Property | Nippon Tetsudō Bt4/6 Standard Remove |
|---|---|
| Grate area | 2.79 m² |
| Firebox surface | 9.824 m² |
| Tube heating surface | 196.064 m² |
| Evaporative heating surface | 205.887 m² |
| Total heating surface | 205.9 m² |
Power plant
| Property | Nippon Tetsudō Bt4/6 Standard Remove |
|---|---|
| Driver diameter | 1,143 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 470 x 610 mm |
Power
| Property | Nippon Tetsudō Bt4/6 Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 708 kW (963 PS) |
| Starting effort | 124.2 kN |
Calculated values
| Property | Nippon Tetsudō Bt4/6 Standard Remove |
|---|---|
| Factor of adhesion | 1 : 3.85 |
| Optimal speed | 35 km/h |
| Power-to-weight ratio | 12.8 kW/t |
| Heating Surface Equivalent | 255.0 m² |
| Cylinder volume/HSE | 1 : 829.13 |
| Adhesive weight/Total | 1 : 1.13 |
| Tractive force/Heating surface | 1 : 12.60 |
| Grate area/Heating surface | 1 : 73.79 |
| Firebox/Tube surface | 1 : 19.96 |
