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US Railroad Administration Heavy Mikado
In addition to the Light Mikado, the USRA standard designs also included the heavier variant, which basically had the same running gear. However, it received larger cylinders and a significantly heavier boiler. Althou...
| US Railroad Administration Heavy MikadoRemove | |
|---|---|
| Variant | Standard |
| Built | 1918-1922 |
| Manufacturers | ALCO;Baldwin;Lima |
| Wheel arrangement | 1D1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 147418 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | US Railroad Administration Heavy 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 Heavy Mikado Standard Remove |
|---|---|
| Wheelbase | 11.00 m |
| Total wheelbase | 21.86 m |
| Service mass | 147.4 t |
| Adhesion mass | 108.9 t |
| Total mass | 231.5 t |
| Rigid wheelbase | 5.11 m |
| Water capacity | 37,854 l |
| Fuel capacity | 14.5 t (coal) |
Boiler
| Property | US Railroad Administration Heavy Mikado Standard Remove |
|---|---|
| Grate area | 6.578 m² |
| Firebox surface | 28.521 m² |
| Tube heating surface | 370.312 m² |
| Evaporative heating surface | 398.833 m² |
| Superheater surface | 92.253 m² |
| Total heating surface | 491.1 m² |
Power plant
| Property | US Railroad Administration Heavy Mikado Standard Remove |
|---|---|
| Driver diameter | 1,600 mm |
| Boiler pressure | 13.1 bar |
| Expansion type | simple expansion |
| Cylinders | two, 686 x 813 mm |
Power
| Property | US Railroad Administration Heavy Mikado Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 2,349 kW (3,194 PS) |
| Starting effort | 266.0 kN |
Calculated values
| Property | US Railroad Administration Heavy Mikado Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.01 |
| Optimal speed | 55 km/h |
| Power-to-weight ratio | 15.9 kW/t |
| Heating Surface Equivalent | 725.9 m² |
| Cylinder volume/HSE | 1 : 827.17 |
| Adhesive weight/Total | 1 : 1.35 |
| Tractive force/Heating surface | 1 : 11.31 |
| Grate area/Heating surface | 1 : 74.66 |
| Firebox/Tube surface | 1 : 12.98 |
| Total/Superheater | 1 : 4.32 |
