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US Army Transportation Corps class S118
During World War II, the US Army Transportation Corps developed a Mikado for narrow-gauge lines that could be used in much of the world. The design was officially called “2-8-2 Dual-Gauge - African Theatre - 42' and 3...
General
| Property | US Army Transportation Corps class S118 Remove |
|---|---|
| Built | 1942-1948 |
| Manufacturers | ALCO, Baldwin, Davenport, Porter, Vulcan |
| Wheel arrangement | 2-8-2 (Mikado) |
| Gauge | 914 mm (Three feet); 1,000 mm (Meter gauge); 1,067 mm (Cape gauge) |
Dimensions and weights
| Property | US Army Transportation Corps class S118 Remove |
|---|---|
| Length | 18.12 m |
| Wheelbase | 8.61 m |
| Rigid wheelbase | 4.12 m |
| Total wheelbase | 16.54 m |
| Service weight | 54 t |
| Adhesive weight | 36.3 t |
| Axle load | 9.1 t |
| Total weight | 99.2 t |
| Water capacity | 18,927 l |
| Fuel capacity | 8.2 t (coal) |
Boiler
| Property | US Army Transportation Corps class S118 Remove |
|---|---|
| Grate area | 2.573 m² |
| Firebox surface | 10.684 m² |
| Tube heating surface | 116.686 m² |
| Evaporative heating surface | 127.37 m² |
| Superheater surface | 34.746 m² |
| Total heating surface | 162.1 m² |
Power plant
| Property | US Army Transportation Corps class S118 Remove |
|---|---|
| Driver diameter | 1,219 mm |
| Boiler pressure | 12.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 406 x 610 mm |
Power
| Property | US Army Transportation Corps class S118 Remove |
|---|---|
| Power source | steam |
| Estimated power | 820 kW (1,115 PS) |
| Starting effort | 89.5 kN |
Calculated values
| Property | US Army Transportation Corps class S118 Remove |
|---|---|
| Factor of adhesion | 1 : 3.98 |
| Optimal speed | 56 km/h |
| Power-to-weight ratio | 15.2 kW/t |
| Heating Surface Equivalent | 250.3 m² |
| Cylinder volume/HSE | 1 : 631.89 |
| Adhesive weight/Total | 1 : 1.49 |
| Tractive force/Heating surface | 1 : 11.53 |
| Grate area/Heating surface | 1 : 63.01 |
| Firebox/Tube surface | 1 : 10.92 |
| Total/Superheater | 1 : 3.67 |
