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Mexican State Railway class HR-01
The articulated 2-6-6-2 of the class HR-01 were the heaviest locomotives used by the Mexican State Railway on their three-foot narrow gauge network. In general dimensions they were similar to the Uintah Railway No. 50...
| Mexican State Railway class HR-01Remove | |
|---|---|
| Variant | |
| Built | 1934, 1936 |
| Manufacturers | ALCO |
| Wheel arrangement | (1C)C1 ma |
| Gauge | 914 mm |
| Length | |
| Service mass | 97976 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Mexican State Railway class HR-01Remove |
|---|---|
| Built | 1934, 1936 |
| Manufacturers | ALCO |
| Wheel arrangement | 2-6-6-2 (Mallet Mogul) |
| Gauge | 914 mm |
Dimensions and weights
| Property | Mexican State Railway class HR-01Remove |
|---|---|
| Wheelbase | 11.43 m |
| Total wheelbase | 19.66 m |
| Service mass | 98 t |
| Adhesion mass | 78.2 t |
| Total mass | 147.9 t |
| Rigid wheelbase | 2.44 m |
| Axle load | 13.7 t |
| Water capacity | 17,034 l |
| Fuel capacity | 11,356 l (oil) |
Boiler
| Property | Mexican State Railway class HR-01Remove |
|---|---|
| Grate area | 48.774 m² |
| Firebox surface | 18.952 m² |
| Tube heating surface | 208.568 m² |
| Evaporative heating surface | 227.52 m² |
| Superheater surface | 63.174 m² |
| Total heating surface | 290.7 m² |
Power plant
| Property | Mexican State Railway class HR-01Remove |
|---|---|
| Driver diameter | 1,092 mm |
| Boiler pressure | 14.5 bar |
| Expansion type | simple expansion |
| Cylinders | four, 381 x 559 mm |
Power
| Property | Mexican State Railway class HR-01Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,491 kW (2,027 PS) |
| Starting effort | 182.8 kN |
Calculated values
| Property | Mexican State Railway class HR-01Remove |
|---|---|
| Factor of adhesion | 1 : 4.20 |
| Optimal speed | 50 km/h |
| Power-to-weight ratio | 15.2 kW/t |
| Heating Surface Equivalent | 448.6 m² |
| Cylinder volume/HSE | 1 : 568.03 |
| Adhesive weight/Total | 1 : 1.25 |
| Tractive force/Heating surface | 1 : 13.13 |
| Grate area/Heating surface | 1 : 5.96 |
| Firebox/Tube surface | 1 : 11.01 |
| Total/Superheater | 1 : 3.60 |
