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Chicago, Rock Island & Pacific (Rock Island) classes R-65 and R-67
The first 65 class R-65 Northerns of the Rock Island were delivered by ALCO-Schenectady in 1929 and 1930. They had a driver diameter of 69 inches and were primarily intended for service with freight trains. Some later...
| Chicago, Rock Island & Pacific (Rock Island) classes R-65 and R-67Remove | |
|---|---|
| Variant | |
| Built | 1929-1930 |
| Manufacturers | ALCO |
| Wheel arrangement | 2D2 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 196859 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Chicago, Rock Island & Pacific (Rock Island) classes R-65 and R-67Remove |
|---|---|
| Built | 1929-1930 |
| Manufacturers | ALCO |
| Wheel arrangement | 4-8-4 (Northern) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Chicago, Rock Island & Pacific (Rock Island) classes R-65 and R-67Remove |
|---|---|
| Wheelbase | 13.89 m |
| Total wheelbase | 26.82 m |
| Service mass | 196.9 t |
| Adhesion mass | 120.4 t |
| Total mass | 334.9 t |
| Rigid wheelbase | 5.87 m |
| Axle load | 30.1 t |
| Water capacity | 56,781 l |
| Fuel capacity | 18.1 t (coal) |
Boiler
| Property | Chicago, Rock Island & Pacific (Rock Island) classes R-65 and R-67Remove |
|---|---|
| Grate area | 8.203 m² |
| Firebox surface | 46.916 m² |
| Tube heating surface | 458.756 m² |
| Evaporative heating surface | 505.672 m² |
| Superheater surface | 208.382 m² |
| Total heating surface | 714.1 m² |
Power plant
| Property | Chicago, Rock Island & Pacific (Rock Island) classes R-65 and R-67Remove |
|---|---|
| Driver diameter | 1,753 mm |
| Boiler pressure | 17.2 bar |
| Expansion type | simple expansion |
| Cylinders | two, 660 x 813 mm |
Power
| Property | Chicago, Rock Island & Pacific (Rock Island) classes R-65 and R-67Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,281 kW (4,461 PS) |
| Starting effort | 296.3 kN |
Calculated values
| Property | Chicago, Rock Island & Pacific (Rock Island) classes R-65 and R-67Remove |
|---|---|
| Factor of adhesion | 1 : 3.99 |
| Optimal speed | 68 km/h |
| Power-to-weight ratio | 16.7 kW/t |
| Heating Surface Equivalent | 1,157.0 m² |
| Cylinder volume/HSE | 1 : 481.26 |
| Adhesive weight/Total | 1 : 1.63 |
| Tractive force/Heating surface | 1 : 8.67 |
| Grate area/Heating surface | 1 : 87.05 |
| Firebox/Tube surface | 1 : 9.78 |
| Total/Superheater | 1 : 2.43 |
