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Atlanta & West Point class P-74
The closely linked Atlanta & West Point and the Western Railway of Alabama had to pull the Southern Railway's "Crescent" between Atlanta, Georgia and Montgomery, Alabama. So they each ordered one locomotive, which was...
General
| Property | Atlanta & West Point class P-74Remove |
|---|---|
| Built | 1926 |
| Manufacturers | Lima |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Atlanta & West Point class P-74Remove |
|---|---|
| Wheelbase | 11.28 m |
| Rigid wheelbase | 4.27 m |
| Total wheelbase | 22.07 m |
| Service weight | 137.7 t |
| Adhesive weight | 87.3 t |
| Axle load | 29.3 t |
| Total weight | 228.6 t |
| Water capacity | 41,640 l |
| Fuel capacity | 13.6 t (coal) |
Boiler
| Property | Atlanta & West Point class P-74Remove |
|---|---|
| Grate area | 6.578 m² |
| Firebox surface | 30.379 m² |
| Tube heating surface | 310.482 m² |
| Evaporative heating surface | 340.862 m² |
| Superheater surface | 91.974 m² |
| Total heating surface | 432.8 m² |
Power plant
| Property | Atlanta & West Point class P-74Remove |
|---|---|
| Driver diameter | 1,880 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 686 x 711 mm |
Power
| Property | Atlanta & West Point class P-74Remove |
|---|---|
| Power source | steam |
| Estimated power | 2,386 kW (3,244 PS) |
| Starting effort | 208.6 kN |
Calculated values
| Property | Atlanta & West Point class P-74Remove |
|---|---|
| Factor of adhesion | 1 : 4.11 |
| Optimal speed | 71 km/h |
| Power-to-weight ratio | 17.3 kW/t |
| Heating Surface Equivalent | 676.7 m² |
| Cylinder volume/HSE | 1 : 776.44 |
| Adhesive weight/Total | 1 : 1.58 |
| Tractive force/Heating surface | 1 : 10.06 |
| Grate area/Heating surface | 1 : 65.80 |
| Firebox/Tube surface | 1 : 10.22 |
| Total/Superheater | 1 : 3.71 |
