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Missouri Pacific class P-73
In the Missouri Pacific class scheme, the designation P-73 stood for 4-6-2 express locomotives with a driver diameter of 73 inches or 1,854 mm. The class consisted of several batches built by two ALCO works between 19...
| Missouri Pacific class P-73Remove | |
|---|---|
| Variant | 6401-6439 as built |
| Built | 1910, 1912 |
| Manufacturers | ALCO |
| Wheel arrangement | 2C1 |
| Gauge | 1435 mm |
| Length | 23578 mm |
| Service mass | 111584 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Missouri Pacific class P-736401-6439 as built |
|---|---|
| Built | 1910, 1912 |
| Manufacturers | ALCO |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Missouri Pacific class P-736401-6439 as built |
|---|---|
| Length | 23.58 m |
| Wheelbase | 10.16 m |
| Total wheelbase | 19.90 m |
| Service mass | 111.6 t |
| Adhesion mass | 70.8 t |
| Total mass | 182.6 t |
| Rigid wheelbase | 3.96 m |
| Water capacity | 30,283 l |
| Fuel capacity | 12.7 t (coal) |
Boiler
| Property | Missouri Pacific class P-736401-6439 as built |
|---|---|
| Grate area | 4.599 m² |
| Firebox surface | 19.482 m² |
| Tube heating surface | 362.164 m² |
| Evaporative heating surface | 381.646 m² |
| Total heating surface | 381.6 m² |
Power plant
| Property | Missouri Pacific class P-736401-6439 as built |
|---|---|
| Driver diameter | 1,753 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 584 x 635 mm |
Power
| Property | Missouri Pacific class P-736401-6439 as built |
|---|---|
| Power source | steam |
| Estimated power | 1,380 kW (1,876 PS) |
| Starting effort | 144.9 kN |
Calculated values
| Property | Missouri Pacific class P-736401-6439 as built |
|---|---|
| Factor of adhesion | 1 : 4.79 |
| Optimal speed | 58 km/h |
| Power-to-weight ratio | 12.4 kW/t |
| Heating Surface Equivalent | 479.1 m² |
| Cylinder volume/HSE | 1 : 710.61 |
| Adhesive weight/Total | 1 : 1.58 |
| Tractive force/Heating surface | 1 : 7.93 |
| Grate area/Heating surface | 1 : 82.98 |
| Firebox/Tube surface | 1 : 18.59 |
