Compare locomotives
Add a locomotive
Chicago, Rock Island & Pacific (Rock Island) class P-40
After the P-33's 25 inch diameter cylinders were too large for the boiler, they had to be downsized to 23.5 inches. To solve this problem, the P-40 class was designed by increasing the grate area from 45 to 63 square ...
| Chicago, Rock Island & Pacific (Rock Island) class P-40Remove | |
|---|---|
| Variant | Standard |
| Built | 1913 |
| Manufacturers | ALCO |
| Wheel arrangement | 2C1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 127686 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Chicago, Rock Island & Pacific (Rock Island) class P-40 Standard Remove |
|---|---|
| Built | 1913 |
| Manufacturers | ALCO |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Chicago, Rock Island & Pacific (Rock Island) class P-40 Standard Remove |
|---|---|
| Wheelbase | 10.31 m |
| Total wheelbase | 21.17 m |
| Service mass | 127.7 t |
| Adhesion mass | 79.2 t |
| Total mass | 215.7 t |
| Rigid wheelbase | 3.96 m |
| Axle load | 26.4 t |
| Water capacity | 32,176 l |
| Fuel capacity | 16,656 l (oil) |
Boiler
| Property | Chicago, Rock Island & Pacific (Rock Island) class P-40 Standard Remove |
|---|---|
| Grate area | 5.853 m² |
| Firebox surface | 22.111 m² |
| Tube heating surface | 304.351 m² |
| Evaporative heating surface | 326.462 m² |
| Superheater surface | 74.787 m² |
| Total heating surface | 401.2 m² |
Power plant
| Property | Chicago, Rock Island & Pacific (Rock Island) class P-40 Standard Remove |
|---|---|
| Driver diameter | 1,880 mm |
| Boiler pressure | 13.1 bar |
| Expansion type | simple expansion |
| Cylinders | two, 648 x 711 mm |
Power
| Property | Chicago, Rock Island & Pacific (Rock Island) class P-40 Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,641 kW (2,231 PS) |
| Starting effort | 176.8 kN |
Calculated values
| Property | Chicago, Rock Island & Pacific (Rock Island) class P-40 Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.39 |
| Optimal speed | 56 km/h |
| Power-to-weight ratio | 12.9 kW/t |
| Heating Surface Equivalent | 586.6 m² |
| Cylinder volume/HSE | 1 : 798.96 |
| Adhesive weight/Total | 1 : 1.61 |
| Tractive force/Heating surface | 1 : 9.20 |
| Grate area/Heating surface | 1 : 68.55 |
| Firebox/Tube surface | 1 : 13.76 |
| Total/Superheater | 1 : 4.37 |
