Southern Pacific class C-9
United States 1905 219 produced
Starting in 1905, the Southern Pacific and its subsidiaries bought a large number of Harriman Common Standard Consolidations. The SP itself got 169 and the Texas & Louisiana 50, both calling them class C-9. They had a relatively small oil-fired firebox, but the oil was atomized outside of the firebox. According to Mexican Fuel Oil, this saved some oil and made cleaning easier. Starting in 1922, most of these locomotives were superheated and got a larger tender.
Technical data
General
| Property | as built | superheated |
|---|---|---|
| Built | 1905-1908 | ab 1922 |
| Manufacturers | ALCO, Baldwin | Sacramento |
| Wheel arrangement | 2-8-0 (Consolidation) | |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | as built | superheated |
|---|---|---|
| Wheelbase | 7.42 m | 7.39 m |
| Total wheelbase | 17.07 m | |
| Service mass | 93.9 t | 98.3 t |
| Adhesion mass | 83.5 t | 87 t |
| Total mass | 154 t | 159.6 t |
| Rigid wheelbase | 4.78 m | |
| Axle load | 20.9 t | 21.8 t |
| Water capacity | 26,498 l | 34,069 l |
| Fuel capacity | 1.3 t (oil) | 1.6 t (oil) |
Boiler
| Property | as built | superheated |
|---|---|---|
| Grate area | 4.599 m² | |
| Firebox surface | 15.914 m² | 17.559 m² |
| Tube heating surface | 299.678 m² | 251.582 m² |
| Evaporative heating surface | 315.592 m² | 269.14 m² |
| Total heating surface | 315.6 m² | 324.9 m² |
| Superheater surface | 55.742 m² | |
Power plant
| Property | as built | superheated |
|---|---|---|
| Driver diameter | 1,448 mm | |
| Boiler pressure | 13.8 bar | 14.5 bar |
| Expansion type | simple expansion | |
| Cylinders | two, 559 x 762 mm | |
Power
| Property | as built | superheated |
|---|---|---|
| Power source | steam | |
| Estimated power | 1,268 kW | 1,491 kW |
| Starting effort | 192.6 kN | 202.3 kN |
Calculated values
| Property | as built | superheated |
|---|---|---|
| Factor of adhesion | 1 : 4.25 | 1 : 4.22 |
| Optimal speed | 40 km/h | 45 km/h |
| Power-to-weight ratio | 13.5 kW/t | 15.2 kW/t |
| Heating Surface Equivalent | 395.2 m² | 468.4 m² |
| Cylinder volume/HSE | 1 : 945.83 | 1 : 797.91 |
| Adhesive weight/Total | 1 : 1.13 | |
| Tractive force/Heating surface | 1 : 12.75 | 1 : 13.00 |
| Grate area/Heating surface | 1 : 68.62 | 1 : 70.64 |
| Firebox/Tube surface | 1 : 18.83 | 1 : 14.33 |
| Total/Superheater | 1 : 4.83 | |
