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Southern Pacific classes F-3 and F-4
After the class F-1 2-10-2s, the Southern Pacific ordered 15 F-3 in 1921 from Lima. They had larger cylinders, a larger boiler and had a trailing truck booster like their predecessors. Like most SP steam locomotives, ...
General
| Property | Southern Pacific classes F-3 and F-4Remove |
|---|---|
| Built | 1921-1922 |
| Manufacturers | Lima, Baldwin |
| Wheel arrangement | 2-10-2 (Santa Fé) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Southern Pacific classes F-3 and F-4Remove |
|---|---|
| Wheelbase | 12.90 m |
| Rigid wheelbase | 6.96 m |
| Total wheelbase | 25.18 m |
| Service weight | 175 t |
| Adhesive weight | 134.9 t |
| Axle load | 27 t |
| Total weight | 275.7 t |
| Water capacity | 45,425 l |
| Fuel capacity | 15,142 l (oil) |
Boiler
| Property | Southern Pacific classes F-3 and F-4Remove |
|---|---|
| Grate area | 7.665 m² |
| Firebox surface | 35.396 m² |
| Tube heating surface | 438.689 m² |
| Evaporative heating surface | 474.085 m² |
| Superheater surface | 123.468 m² |
| Total heating surface | 597.6 m² |
Power plant
| Property | Southern Pacific classes F-3 and F-4Remove |
|---|---|
| Driver diameter | 1,613 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 749 x 813 mm |
Power
| Property | Southern Pacific classes F-3 and F-4Remove |
|---|---|
| Power source | steam |
| Estimated power | 2,498 kW (3,396 PS) |
| Starting effort | 331.6 kN |
| Starting effort booster | 48.041 kN |
Calculated values
| Property | Southern Pacific classes F-3 and F-4Remove |
|---|---|
| Factor of adhesion | 1 : 3.99 |
| Optimal speed | 47 km/h |
| Power-to-weight ratio | 14.3 kW/t |
| Heating Surface Equivalent | 898.0 m² |
| Cylinder volume/HSE | 1 : 798.25 |
| Adhesive weight/Total | 1 : 1.30 |
| Tractive force/Heating surface | 1 : 11.59 |
| Grate area/Heating surface | 1 : 77.96 |
| Firebox/Tube surface | 1 : 12.39 |
| Total/Superheater | 1 : 3.84 |
