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Southern Pacific classes MC-2, MC-4 and MC-6 and AC-1 to AC-3
The first locomotives that Southern Pacific had built as cab forwards were the MC-2. They were similar to the MC-1, but were reversed with the cab at the front. In order to be able to transport the oil into the firebo...
| Southern Pacific classes MC-2, MC-4 and MC-6 and AC-1 to AC-3Remove | |
|---|---|
| Variant | |
| Built | 1912 |
| Manufacturers | Baldwin |
| Wheel arrangement | 1D(D1) ma |
| Gauge | 1435 mm |
| Length | |
| Service mass | 197676 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Southern Pacific classes MC-2, MC-4 and MC-6 and AC-1 to AC-3Remove |
|---|---|
| Built | 1912 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2-8-8-2 (Mikado Mallet) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Southern Pacific classes MC-2, MC-4 and MC-6 and AC-1 to AC-3Remove |
|---|---|
| Length loco | 20.60 m |
| Wheelbase | 17.25 m |
| Total wheelbase | 27.53 m |
| Service mass | 197.7 t |
| Adhesion mass | 181.8 t |
| Total mass | 281.4 t |
| Rigid wheelbase | 4.57 m |
| Axle load | 23.2 t |
| Water capacity | 37,854 l |
| Fuel capacity | 12,113 l (oil) |
Boiler
| Property | Southern Pacific classes MC-2, MC-4 and MC-6 and AC-1 to AC-3Remove |
|---|---|
| Grate area | 6.355 m² |
| Firebox surface | 22.297 m² |
| Tube heating surface | 365.76 m² |
| Evaporative heating surface | 388.056 m² |
| Superheater surface | 77.946 m² |
| Total heating surface | 466.0 m² |
Power plant
| Property | Southern Pacific classes MC-2, MC-4 and MC-6 and AC-1 to AC-3Remove |
|---|---|
| Driver diameter | 1,448 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | compound |
| Cylinders | four, HP: 660 x 762 mm and LP: 1,016 x 762 mm |
Power
| Property | Southern Pacific classes MC-2, MC-4 and MC-6 and AC-1 to AC-3Remove |
|---|---|
| Power source | steam |
| Estimated power | 2,013 kW (2,737 PS) |
| Starting effort | 378.3 kN |
| Starting effort simple | 453.9 kN |
Calculated values
| Property | Southern Pacific classes MC-2, MC-4 and MC-6 and AC-1 to AC-3Remove |
|---|---|
| Factor of adhesion | 1 : 4.71 |
| Optimal speed | 32 km/h |
| Power-to-weight ratio | 10.2 kW/t |
| Heating Surface Equivalent | 655.4 m² |
| Cylinder volume/HSE | 1 : 1,739.00 |
| Adhesive weight/Total | 1 : 1.09 |
| Tractive force/Heating surface | 1 : 16.95 |
| Grate area/Heating surface | 1 : 73.33 |
| Firebox/Tube surface | 1 : 16.40 |
| Total/Superheater | 1 : 4.98 |
