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Union Pacific classes FEF-1 to FEF-3
When William Jeffer, President of the Union Pacific, got stalled on a grade with his train, the initial order for the FEF series came about. The 4-8-2 class 7000 locomotive used at the time was to be given a more powe...
| Union Pacific classes FEF-1 to FEF-3Remove | |
|---|---|
| Variant | |
| Built | 1938 |
| Manufacturers | ALCO |
| Wheel arrangement | 2D2 |
| Gauge | 1435 mm |
| Length | 34814 mm |
| Service mass | 210921 kg |
| Top speed | 177 km/h |
| Power | |
| Engine |
General
| Property | Union Pacific classes FEF-1 to FEF-3Remove |
|---|---|
| Built | 1938 |
| Manufacturers | ALCO |
| Wheel arrangement | 4-8-4 (Northern) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Union Pacific classes FEF-1 to FEF-3Remove |
|---|---|
| Length | 34.81 m |
| Wheelbase | 15.01 m |
| Service mass | 210.9 t |
| Adhesion mass | 122.5 t |
| Total mass | 385.3 t |
| Rigid wheelbase | 6.55 m |
| Axle load | 30.6 t |
| Water capacity | 75,708 l |
| Fuel capacity | 22.7 t (coal) |
Boiler
| Property | Union Pacific classes FEF-1 to FEF-3Remove |
|---|---|
| Grate area | 9.309 m² |
| Firebox surface | 44.501 m² |
| Tube heating surface | 382.575 m² |
| Evaporative heating surface | 427.076 m² |
| Superheater surface | 136.846 m² |
| Total heating surface | 563.9 m² |
Power plant
| Property | Union Pacific classes FEF-1 to FEF-3Remove |
|---|---|
| Driver diameter | 1,956 mm |
| Boiler pressure | 17.9 bar |
| Expansion type | simple expansion |
| Cylinders | two, 622 x 813 mm |
Power
| Property | Union Pacific classes FEF-1 to FEF-3Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,579 kW (4,866 PS) |
| Top speed | 177 km/h |
| Starting effort | 245.2 kN |
Calculated values
| Property | Union Pacific classes FEF-1 to FEF-3Remove |
|---|---|
| Factor of adhesion | 1 : 4.90 |
| Optimal speed | 90 km/h |
| Power-to-weight ratio | 17.0 kW/t |
| Heating Surface Equivalent | 923.3 m² |
| Cylinder volume/HSE | 1 : 535.52 |
| Adhesive weight/Total | 1 : 1.72 |
| Tractive force/Heating surface | 1 : 9.08 |
| Grate area/Heating surface | 1 : 60.58 |
| Firebox/Tube surface | 1 : 8.60 |
| Total/Superheater | 1 : 3.12 |
