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US Railroad Administration Heavy Mountain
One of the USRA standard types intended for lighter, fast freight trains was the Heavy Mountain. Compared to the Light Mountain, it had the same wheel diameter and boiler pressure, but a cylinder diameter increased by...
| US Railroad Administration Heavy MountainRemove | |
|---|---|
| Variant | Chesapeake & Ohio |
| Built | 1918 |
| Manufacturers | ALCO;Baldwin |
| Wheel arrangement | 2D1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 159892 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | US Railroad Administration Heavy MountainChesapeake & Ohio |
|---|---|
| Built | 1918 |
| Manufacturers | ALCO, Baldwin |
| Wheel arrangement | 4-8-2 (Mountain) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | US Railroad Administration Heavy MountainChesapeake & Ohio |
|---|---|
| Wheelbase | 12.19 m |
| Total wheelbase | 23.08 m |
| Service mass | 159.9 t |
| Adhesion mass | 110.2 t |
| Total mass | 248 t |
| Rigid wheelbase | 5.56 m |
| Axle load | 27.6 t |
| Water capacity | 37,854 l |
| Fuel capacity | 14.5 t (coal) |
Boiler
| Property | US Railroad Administration Heavy MountainChesapeake & Ohio |
|---|---|
| Grate area | 7.089 m² |
| Firebox surface | 34.653 m² |
| Tube heating surface | 398.833 m² |
| Evaporative heating surface | 433.486 m² |
| Superheater surface | 100.8 m² |
| Total heating surface | 534.3 m² |
Power plant
| Property | US Railroad Administration Heavy MountainChesapeake & Ohio |
|---|---|
| Driver diameter | 1,753 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 711 x 762 mm |
Power
| Property | US Railroad Administration Heavy MountainChesapeake & Ohio |
|---|---|
| Power source | steam |
| Estimated power | 2,535 kW (3,447 PS) |
| Starting effort | 257.8 kN |
Calculated values
| Property | US Railroad Administration Heavy MountainChesapeake & Ohio |
|---|---|
| Factor of adhesion | 1 : 4.19 |
| Optimal speed | 60 km/h |
| Power-to-weight ratio | 15.9 kW/t |
| Heating Surface Equivalent | 808.4 m² |
| Cylinder volume/HSE | 1 : 748.96 |
| Adhesive weight/Total | 1 : 1.45 |
| Tractive force/Heating surface | 1 : 10.08 |
| Grate area/Heating surface | 1 : 75.37 |
| Firebox/Tube surface | 1 : 11.51 |
| Total/Superheater | 1 : 4.30 |
