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Mexican State Railway class NR-1
The Nacional de Mexico received ten Hudsons from ALCO in Schenectady in 1937. With an adhesive weight of 170.000 pounds , they were among the lightest North American locomotives with this wheel arrangement. Thanks to ...
| Mexican State Railway class NR-1Remove | |
|---|---|
| Variant | Standard |
| Built | 1937 |
| Manufacturers | ALCO |
| Wheel arrangement | 2C2 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 132449 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Mexican State Railway class NR-1 Standard Remove |
|---|---|
| Built | 1937 |
| Manufacturers | ALCO |
| Wheel arrangement | 4-6-4 (Hudson) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Mexican State Railway class NR-1 Standard Remove |
|---|---|
| Wheelbase | 11.51 m |
| Total wheelbase | 21.06 m |
| Service mass | 132.4 t |
| Adhesion mass | 77.1 t |
| Total mass | 211.2 t |
| Rigid wheelbase | 3.96 m |
| Axle load | 25.7 t |
| Water capacity | 32,176 l |
| Fuel capacity | 15,282 l (oil) |
Boiler
| Property | Mexican State Railway class NR-1 Standard Remove |
|---|---|
| Grate area | 6.206 m² |
| Firebox surface | 26.106 m² |
| Tube heating surface | 247.68 m² |
| Evaporative heating surface | 273.786 m² |
| Superheater surface | 78.968 m² |
| Total heating surface | 352.8 m² |
Power plant
| Property | Mexican State Railway class NR-1 Standard Remove |
|---|---|
| Driver diameter | 1,854 mm |
| Boiler pressure | 17.2 bar |
| Expansion type | simple expansion |
| Cylinders | two, 572 x 711 mm |
Power
| Property | Mexican State Railway class NR-1 Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 2,461 kW (3,346 PS) |
| Starting effort | 183.5 kN |
Calculated values
| Property | Mexican State Railway class NR-1 Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.12 |
| Optimal speed | 82 km/h |
| Power-to-weight ratio | 18.6 kW/t |
| Heating Surface Equivalent | 562.3 m² |
| Cylinder volume/HSE | 1 : 648.95 |
| Adhesive weight/Total | 1 : 1.72 |
| Tractive force/Heating surface | 1 : 10.87 |
| Grate area/Heating surface | 1 : 56.84 |
| Firebox/Tube surface | 1 : 9.49 |
| Total/Superheater | 1 : 3.47 |
