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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 | rebuilt AC-1 to AC-3 |
| Built | 1927-1930 |
| Manufacturers | Sacramento |
| Wheel arrangement | 1D(D1) ma |
| Gauge | 1435 mm |
| Length | |
| Service mass | 218269 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Southern Pacific classes MC-2, MC-4 and MC-6 and AC-1 to AC-3rebuilt AC-1 to AC-3 |
|---|---|
| Built | 1927-1930 |
| Manufacturers | Sacramento |
| 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-3rebuilt AC-1 to AC-3 |
|---|---|
| Length loco | 20.60 m |
| Wheelbase | 17.25 m |
| Total wheelbase | 27.53 m |
| Service mass | 218.3 t |
| Adhesion mass | 199.9 t |
| Rigid wheelbase | 4.57 m |
| 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-3rebuilt AC-1 to AC-3 |
|---|---|
| Grate area | 6.355 m² |
| Firebox surface | 33.631 m² |
| Tube heating surface | 419.365 m² |
| Evaporative heating surface | 452.996 m² |
| Superheater surface | 199.742 m² |
| Total heating surface | 652.7 m² |
Power plant
| Property | Southern Pacific classes MC-2, MC-4 and MC-6 and AC-1 to AC-3rebuilt AC-1 to AC-3 |
|---|---|
| Driver diameter | 1,448 mm |
| Boiler pressure | 14.5 bar |
| Expansion type | simple expansion |
| Cylinders | four, 559 x 762 mm |
Power
| Property | Southern Pacific classes MC-2, MC-4 and MC-6 and AC-1 to AC-3rebuilt AC-1 to AC-3 |
|---|---|
| Power source | steam |
| Estimated power | 2,386 kW (3,244 PS) |
| Starting effort | 404.5 kN |
Calculated values
| Property | Southern Pacific classes MC-2, MC-4 and MC-6 and AC-1 to AC-3rebuilt AC-1 to AC-3 |
|---|---|
| Factor of adhesion | 1 : 4.85 |
| Optimal speed | 35 km/h |
| Power-to-weight ratio | 10.9 kW/t |
| Heating Surface Equivalent | 1,020.6 m² |
| Cylinder volume/HSE | 1 : 732.40 |
| Adhesive weight/Total | 1 : 1.09 |
| Tractive force/Heating surface | 1 : 12.94 |
| Grate area/Heating surface | 1 : 102.71 |
| Firebox/Tube surface | 1 : 12.47 |
| Total/Superheater | 1 : 2.27 |
