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Canadian National class U-2
For mixed service with freight, passenger and express trains, the Canadian National procured locomotives with the wheel arrangement 4-8-4 for the first time in 1927, known in English-speaking countries as “Northern”. ...
| Canadian National class U-2Remove | |
|---|---|
| Variant | U-2c, d, e, f |
| Built | 1929, 1936, 1940 |
| Manufacturers | Canadian Locomotive Co.;Montreal Locomotive Works |
| Wheel arrangement | 2D2 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 173726 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Canadian National class U-2U-2c, d, e, f |
|---|---|
| Built | 1929, 1936, 1940 |
| Manufacturers | Canadian Locomotive Co., Montreal Locomotive Works |
| Wheel arrangement | 4-8-4 (Northern) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Canadian National class U-2U-2c, d, e, f |
|---|---|
| Wheelbase | 13.36 m |
| Total wheelbase | 25.12 m |
| Service mass | 173.7 t |
| Adhesion mass | 105.3 t |
| Total mass | 299.8 t |
| Rigid wheelbase | 5.94 m |
| Water capacity | 52,735 l |
| Fuel capacity | 18.3 t (coal) |
Boiler
| Property | Canadian National class U-2U-2c, d, e, f |
|---|---|
| Grate area | 7.841 m² |
| Firebox surface | 38.555 m² |
| Tube heating surface | 353.496 m² |
| Evaporative heating surface | 392.051 m² |
| Superheater surface | 163.51 m² |
| Total heating surface | 555.6 m² |
Power plant
| Property | Canadian National class U-2U-2c, d, e, f |
|---|---|
| Driver diameter | 1,854 mm |
| Boiler pressure | 17.2 bar |
| Expansion type | simple expansion |
| Cylinders | two, 648 x 762 mm |
Power
| Property | Canadian National class U-2U-2c, d, e, f |
|---|---|
| Power source | steam |
| Estimated power | 2,946 kW (4,005 PS) |
| Starting effort | 252.6 kN |
Calculated values
| Property | Canadian National class U-2U-2c, d, e, f |
|---|---|
| Factor of adhesion | 1 : 4.09 |
| Optimal speed | 71 km/h |
| Power-to-weight ratio | 17.0 kW/t |
| Heating Surface Equivalent | 911.8 m² |
| Cylinder volume/HSE | 1 : 550.68 |
| Adhesive weight/Total | 1 : 1.65 |
| Tractive force/Heating surface | 1 : 9.50 |
| Grate area/Heating surface | 1 : 70.85 |
| Firebox/Tube surface | 1 : 9.17 |
| Total/Superheater | 1 : 2.40 |
