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Mexicano class R-3
The last and heaviest Double Fairlies ordered by the Mexican Railway were the three members of the class R-3, numbered 183 to 185, which were built by Vulcan Foundry in 1911. They were ordered for the Orizabo-Esperanz...
General
| Property | Mexicano class R-3Remove |
|---|---|
| Built | 1911 |
| Manufacturers | Vulcan Foundry |
| Wheel arrangement | 0-6-6-0T (Double Fairlie) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Mexicano class R-3Remove |
|---|---|
| Length | 17.11 m |
| Wheelbase | 10.82 m |
| Rigid wheelbase | 2.82 m |
| Service weight | 140.2 t |
| Adhesive weight | 140.2 t |
| Axle load | 23.4 t |
| Water capacity | 21,823 l |
| Fuel capacity | 8.1 t (coal) |
Boiler
| Property | Mexicano class R-3Remove |
|---|---|
| Grate area | 4.436 m² |
| Firebox surface | 22.761 m² |
| Tube heating surface | 248.887 m² |
| Evaporative heating surface | 271.648 m² |
| Total heating surface | 271.6 m² |
Power plant
| Property | Mexicano class R-3Remove |
|---|---|
| Driver diameter | 1,219 mm |
| Boiler pressure | 12.8 bar |
| Expansion type | simple expansion |
| Cylinders | four, 483 x 635 mm |
Power
| Property | Mexicano class R-3Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,119 kW (1,521 PS) |
| Starting effort | 263.0 kN |
Calculated values
| Property | Mexicano class R-3Remove |
|---|---|
| Factor of adhesion | 1 : 5.23 |
| Optimal speed | 26 km/h |
| Power-to-weight ratio | 8.0 kW/t |
| Heating Surface Equivalent | 385.5 m² |
| Cylinder volume/HSE | 1 : 1,205.39 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 20.22 |
| Grate area/Heating surface | 1 : 61.24 |
| Firebox/Tube surface | 1 : 10.93 |
