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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 rebuilt |
| Built | 1916 |
| Manufacturers | Missouri Pacific |
| Wheel arrangement | 2C1 |
| Gauge | 1435 mm |
| Length | 23578 mm |
| Service mass | 127151 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Missouri Pacific class P-736401-6439 rebuilt |
|---|---|
| Built | 1916 |
| Manufacturers | Missouri Pacific |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Missouri Pacific class P-736401-6439 rebuilt |
|---|---|
| Length | 23.58 m |
| Wheelbase | 10.16 m |
| Total wheelbase | 19.90 m |
| Service mass | 127.2 t |
| Adhesion mass | 78.7 t |
| Total mass | 198.1 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 rebuilt |
|---|---|
| Grate area | 4.599 m² |
| Firebox surface | 25.177 m² |
| Tube heating surface | 301.006 m² |
| Evaporative heating surface | 326.183 m² |
| Superheater surface | 67.076 m² |
| Total heating surface | 393.3 m² |
Power plant
| Property | Missouri Pacific class P-736401-6439 rebuilt |
|---|---|
| Driver diameter | 1,854 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 635 x 660 mm |
Power
| Property | Missouri Pacific class P-736401-6439 rebuilt |
|---|---|
| Power source | steam |
| Estimated power | 1,491 kW (2,027 PS) |
| Starting effort | 151.5 kN |
Calculated values
| Property | Missouri Pacific class P-736401-6439 rebuilt |
|---|---|
| Factor of adhesion | 1 : 5.10 |
| Optimal speed | 60 km/h |
| Power-to-weight ratio | 11.7 kW/t |
| Heating Surface Equivalent | 586.2 m² |
| Cylinder volume/HSE | 1 : 713.53 |
| Adhesive weight/Total | 1 : 1.62 |
| Tractive force/Heating surface | 1 : 8.05 |
| Grate area/Heating surface | 1 : 85.51 |
| Firebox/Tube surface | 1 : 11.96 |
| Total/Superheater | 1 : 4.86 |
