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Union Railroad class U-108b
The Union Railroad was part of US Steel and was responsible for freight traffic between some of their plants and the main lines of several railroads in western Pennsylvania. The low speeds made it possible to design a...
General
| Property | Union Railroad class U-108bRemove |
|---|---|
| Built | 1936-1939 |
| Manufacturers | Baldwin |
| Wheel arrangement | 0-10-2 (Union) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Union Railroad class U-108bRemove |
|---|---|
| Wheelbase | 9.75 m |
| Rigid wheelbase | 6.71 m |
| Total wheelbase | 20.50 m |
| Service weight | 183.4 t |
| Adhesive weight | 156 t |
| Axle load | 31.8 t |
| Total weight | 292.3 t |
| Water capacity | 45,425 l |
| Fuel capacity | 12.7 t (coal) |
Boiler
| Property | Union Railroad class U-108bRemove |
|---|---|
| Grate area | 7.92 m² |
| Firebox surface | 41.686 m² |
| Tube heating surface | 404.993 m² |
| Evaporative heating surface | 446.678 m² |
| Superheater surface | 129.042 m² |
| Total heating surface | 575.7 m² |
Power plant
| Property | Union Railroad class U-108bRemove |
|---|---|
| Driver diameter | 1,549 mm |
| Boiler pressure | 17.9 bar |
| Expansion type | simple expansion |
| Cylinders | two, 711 x 813 mm |
Power
| Property | Union Railroad class U-108bRemove |
|---|---|
| Power source | steam |
| Estimated power | 2,983 kW (4,056 PS) |
| Starting effort | 404.3 kN |
| Starting effort booster | 76.287 kN |
Calculated values
| Property | Union Railroad class U-108bRemove |
|---|---|
| Factor of adhesion | 1 : 3.79 |
| Optimal speed | 45 km/h |
| Power-to-weight ratio | 16.3 kW/t |
| Heating Surface Equivalent | 913.2 m² |
| Cylinder volume/HSE | 1 : 707.17 |
| Adhesive weight/Total | 1 : 1.18 |
| Tractive force/Heating surface | 1 : 14.67 |
| Grate area/Heating surface | 1 : 72.69 |
| Firebox/Tube surface | 1 : 9.72 |
| Total/Superheater | 1 : 3.46 |
