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Canadian National and Grand Trunk Western class P-4
The class P-4 was the most powerful of the 0-8-0 switchers built for the Canadian National and its constituents. They had cylinders of 26 by 30 inches, drivers of 56 inches and a boiler pressure of 180 psi . The resul...
| Canadian National and Grand Trunk Western class P-4Remove | |
|---|---|
| Variant | |
| Built | 1923 |
| Manufacturers | Canadian Locomotive Co.;Grand Trunk |
| Wheel arrangement | D |
| Gauge | 1435 mm |
| Length | 21723 mm |
| Service mass | 110110 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Canadian National and Grand Trunk Western class P-4Remove |
|---|---|
| Built | 1923 |
| Manufacturers | Canadian Locomotive Co., Grand Trunk |
| Wheel arrangement | 0-8-0 (Eight-coupled) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Canadian National and Grand Trunk Western class P-4Remove |
|---|---|
| Length | 21.72 m |
| Wheelbase | 4.72 m |
| Total wheelbase | 16.27 m |
| Empty mass | 99 t |
| Service mass | 110.1 t |
| Adhesion mass | 110.1 t |
| Total mass | 183.4 t |
| Rigid wheelbase | 4.72 m |
| Axle load | 27.5 t |
| Water capacity | 28,391 l |
| Fuel capacity | 8.2 t (coal) |
Boiler
| Property | Canadian National and Grand Trunk Western class P-4Remove |
|---|---|
| Grate area | 5.249 m² |
| Firebox surface | 19.881 m² |
| Tube heating surface | 218.508 m² |
| Evaporative heating surface | 238.389 m² |
| Superheater surface | 55.928 m² |
| Total heating surface | 294.3 m² |
Power plant
| Property | Canadian National and Grand Trunk Western class P-4Remove |
|---|---|
| Driver diameter | 1,422 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 660 x 762 mm |
Power
| Property | Canadian National and Grand Trunk Western class P-4Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,342 kW (1,825 PS) |
| Starting effort | 246.5 kN |
Calculated values
| Property | Canadian National and Grand Trunk Western class P-4Remove |
|---|---|
| Factor of adhesion | 1 : 4.38 |
| Optimal speed | 34 km/h |
| Power-to-weight ratio | 12.2 kW/t |
| Heating Surface Equivalent | 449.7 m² |
| Cylinder volume/HSE | 1 : 1,160.95 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 17.49 |
| Grate area/Heating surface | 1 : 56.07 |
| Firebox/Tube surface | 1 : 10.99 |
| Total/Superheater | 1 : 4.26 |
