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Southern Pacific classes MT-1, MT-3, MT-4 and MT-5
The Mountains of the Southern Pacific were intended for long-range passenger trains, sometimes covering more than 800 miles without changing locomotives. The first 28 MT-1s were built by ALCO in Schenectady in 1923 an...
| Southern Pacific classes MT-1, MT-3, MT-4 and MT-5Remove | |
|---|---|
| Variant | Standard |
| Built | 1923-1930 |
| Manufacturers | ALCO;Sacramento |
| Wheel arrangement | 2D1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 166922 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Southern Pacific classes MT-1, MT-3, MT-4 and MT-5 Standard Remove |
|---|---|
| Built | 1923-1930 |
| Manufacturers | ALCO, Sacramento |
| Wheel arrangement | 4-8-2 (Mountain) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Southern Pacific classes MT-1, MT-3, MT-4 and MT-5 Standard Remove |
|---|---|
| Wheelbase | 12.88 m |
| Total wheelbase | 25.45 m |
| Service mass | 166.9 t |
| Adhesion mass | 111.6 t |
| Total mass | 276.9 t |
| Rigid wheelbase | 6.10 m |
| Axle load | 28 t |
| Water capacity | 45,425 l |
| Fuel capacity | 1.7 t (oil) |
Boiler
| Property | Southern Pacific classes MT-1, MT-3, MT-4 and MT-5 Standard Remove |
|---|---|
| Grate area | 7.033 m² |
| Firebox surface | 32.981 m² |
| Tube heating surface | 390.286 m² |
| Evaporative heating surface | 423.267 m² |
| Superheater surface | 107.953 m² |
| Total heating surface | 531.2 m² |
Power plant
| Property | Southern Pacific classes MT-1, MT-3, MT-4 and MT-5 Standard Remove |
|---|---|
| Driver diameter | 1,854 mm |
| Boiler pressure | 14.5 bar |
| Expansion type | simple expansion |
| Cylinders | two, 711 x 762 mm |
Power
| Property | Southern Pacific classes MT-1, MT-3, MT-4 and MT-5 Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 2,573 kW (3,498 PS) |
| Starting effort | 255.8 kN |
| Starting effort booster | 44.927 kN |
Calculated values
| Property | Southern Pacific classes MT-1, MT-3, MT-4 and MT-5 Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.28 |
| Optimal speed | 61 km/h |
| Power-to-weight ratio | 15.4 kW/t |
| Heating Surface Equivalent | 804.1 m² |
| Cylinder volume/HSE | 1 : 752.94 |
| Adhesive weight/Total | 1 : 1.50 |
| Tractive force/Heating surface | 1 : 10.06 |
| Grate area/Heating surface | 1 : 75.53 |
| Firebox/Tube surface | 1 : 11.83 |
| Total/Superheater | 1 : 3.92 |
