Compare locomotives
Add a locomotive
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...
General
| Property | Union Pacific classes FEF-1 to FEF-3 Remove |
|---|---|
| Built | 1939 |
| Manufacturers | ALCO |
| Wheel arrangement | 4-8-4 (Northern) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Union Pacific classes FEF-1 to FEF-3 Remove |
|---|---|
| Length | 34.81 m |
| Wheelbase | 15.49 m |
| Rigid wheelbase | 6.71 m |
| Service weight | 217.1 t |
| Adhesive weight | 120.4 t |
| Axle load | 30.1 t |
| Total weight | 405.9 t |
| Water capacity | 88,957 l |
| Fuel capacity | 22.7 t (coal) |
Boiler
| Property | Union Pacific classes FEF-1 to FEF-3 Remove |
|---|---|
| Grate area | 9.309 m² |
| Firebox surface | 41.063 m² |
| Tube heating surface | 368.918 m² |
| Evaporative heating surface | 409.982 m² |
| Superheater surface | 176.516 m² |
| Total heating surface | 586.5 m² |
Power plant
| Property | Union Pacific classes FEF-1 to FEF-3 Remove |
|---|---|
| Driver diameter | 2,032 mm |
| Boiler pressure | 20.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 635 x 813 mm |
Power
| Property | Union Pacific classes FEF-1 to FEF-3 Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,878 kW (5,273 PS) |
| Top speed | 193 km/h |
| Starting effort | 283.6 kN |
Calculated values
| Property | Union Pacific classes FEF-1 to FEF-3 Remove |
|---|---|
| Factor of adhesion | 1 : 4.17 |
| Optimal speed | 84 km/h |
| Power-to-weight ratio | 17.9 kW/t |
| Heating Surface Equivalent | 968.3 m² |
| Cylinder volume/HSE | 1 : 531.65 |
| Adhesive weight/Total | 1 : 1.80 |
| Tractive force/Heating surface | 1 : 10.10 |
| Grate area/Heating surface | 1 : 63.00 |
| Firebox/Tube surface | 1 : 8.98 |
| Total/Superheater | 1 : 2.32 |
