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US Railroad Administration 2-6-6-2 (Light Mallet)
The second largest of the steam locomotive types standardized by the United States Railroad Administration during World War I was a Mallet with a 2-6-6-2 wheel arrangement. The basis for this design were the H-2 and H...
| US Railroad Administration 2-6-6-2 (Light Mallet)Remove | |
|---|---|
| Variant | Standard |
| Built | 1918-1923, 1949 |
| Manufacturers | ALCO;Baldwin |
| Wheel arrangement | (1C)C1 ma |
| Gauge | 1435 mm |
| Length | 30390 mm |
| Service mass | 203210 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | US Railroad Administration 2-6-6-2 (Light Mallet) Standard Remove |
|---|---|
| Built | 1918-1923, 1949 |
| Manufacturers | ALCO, Baldwin |
| Wheel arrangement | 2-6-6-2 (Mallet Mogul) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | US Railroad Administration 2-6-6-2 (Light Mallet) Standard Remove |
|---|---|
| Length | 30.39 m |
| Wheelbase | 15.16 m |
| Total wheelbase | 27.25 m |
| Service mass | 203.2 t |
| Adhesion mass | 162.4 t |
| Total mass | 296.9 t |
| Rigid wheelbase | 3.20 m |
| Axle load | 27.3 t |
| Water capacity | 45,425 l |
| Fuel capacity | 14.5 t (coal) |
Boiler
| Property | US Railroad Administration 2-6-6-2 (Light Mallet) Standard Remove |
|---|---|
| Grate area | 7.089 m² |
| Firebox surface | 38.648 m² |
| Tube heating surface | 467.024 m² |
| Evaporative heating surface | 505.672 m² |
| Superheater surface | 120.031 m² |
| Total heating surface | 625.7 m² |
Power plant
| Property | US Railroad Administration 2-6-6-2 (Light Mallet) Standard Remove |
|---|---|
| Driver diameter | 1,448 mm |
| Boiler pressure | 15.5 bar |
| Expansion type | compound |
| Cylinders | four, HP: 584 x 813 mm and LP: 889 x 813 mm |
Power
| Property | US Railroad Administration 2-6-6-2 (Light Mallet) Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 2,610 kW (3,549 PS) |
| Starting effort | 352.9 kN |
| Starting effort simple | 423.5 kN |
Calculated values
| Property | US Railroad Administration 2-6-6-2 (Light Mallet) Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.51 |
| Optimal speed | 45 km/h |
| Power-to-weight ratio | 12.8 kW/t |
| Heating Surface Equivalent | 939.0 m² |
| Cylinder volume/HSE | 1 : 1,001.37 |
| Adhesive weight/Total | 1 : 1.25 |
| Tractive force/Heating surface | 1 : 11.78 |
| Grate area/Heating surface | 1 : 88.26 |
| Firebox/Tube surface | 1 : 12.08 |
| Total/Superheater | 1 : 4.21 |
