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US Railroad Administration Light Mikado
Since the 2-8-2 wheel arrangement had now become the US standard for lighter freight trains, the USRA designed the Light Mikado as the standard type for this purpose. It is considered the first USRA design to enter se...
| US Railroad Administration Light MikadoRemove | |
|---|---|
| Variant | Standard |
| Built | 1918-1922 |
| Manufacturers | ALCO;Baldwin;Lima |
| Wheel arrangement | 1D1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 131905 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | US Railroad Administration Light Mikado Standard Remove |
|---|---|
| Built | 1918-1922 |
| Manufacturers | ALCO, Baldwin, Lima |
| Wheel arrangement | 2-8-2 (Mikado) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | US Railroad Administration Light Mikado Standard Remove |
|---|---|
| Wheelbase | 11.00 m |
| Total wheelbase | 21.74 m |
| Service mass | 131.9 t |
| Adhesion mass | 100.5 t |
| Total mass | 217.3 t |
| Rigid wheelbase | 5.11 m |
| Water capacity | 37,854 l |
| Fuel capacity | 14.5 t (coal) |
Boiler
| Property | US Railroad Administration Light Mikado Standard Remove |
|---|---|
| Grate area | 6.197 m² |
| Firebox surface | 26.013 m² |
| Tube heating surface | 325.44 m² |
| Evaporative heating surface | 351.453 m² |
| Superheater surface | 81.941 m² |
| Total heating surface | 433.4 m² |
Power plant
| Property | US Railroad Administration Light Mikado Standard Remove |
|---|---|
| Driver diameter | 1,600 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 660 x 762 mm |
Power
| Property | US Railroad Administration Light Mikado Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 2,200 kW (2,991 PS) |
| Starting effort | 243.4 kN |
Calculated values
| Property | US Railroad Administration Light Mikado Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.05 |
| Optimal speed | 55 km/h |
| Power-to-weight ratio | 16.7 kW/t |
| Heating Surface Equivalent | 645.4 m² |
| Cylinder volume/HSE | 1 : 808.84 |
| Adhesive weight/Total | 1 : 1.31 |
| Tractive force/Heating surface | 1 : 11.73 |
| Grate area/Heating surface | 1 : 69.94 |
| Firebox/Tube surface | 1 : 12.51 |
| Total/Superheater | 1 : 4.29 |
