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Chicago & North Western class D
The class of the D Chicago & North Western was one of the first Atlantics with a wide firebox . With this arrangement, it was quickly discovered that firing was much easier and that much power could even be delivered ...
| Chicago & North Western class DRemove | |
|---|---|
| Variant | 1900 variant |
| Built | 1900-1908 |
| Manufacturers | ALCO |
| Wheel arrangement | 2B1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 71668 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Chicago & North Western class D1900 variant |
|---|---|
| Built | 1900-1908 |
| Manufacturers | ALCO |
| Wheel arrangement | 4-4-2 (Atlantic) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Chicago & North Western class D1900 variant |
|---|---|
| Wheelbase | 8.15 m |
| Total wheelbase | 17.67 m |
| Service mass | 71.7 t |
| Adhesion mass | 41.3 t |
| Total mass | 135.2 t |
| Rigid wheelbase | 2.13 m |
| Axle load | 20.6 t |
| Water capacity | 28,391 l |
| Fuel capacity | 9.1 t (coal) |
Boiler
| Property | Chicago & North Western class D1900 variant |
|---|---|
| Grate area | 4.301 m² |
| Firebox surface | 18.488 m² |
| Tube heating surface | 261.708 m² |
| Evaporative heating surface | 280.196 m² |
| Total heating surface | 280.2 m² |
Power plant
| Property | Chicago & North Western class D1900 variant |
|---|---|
| Driver diameter | 2,032 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 508 x 660 mm |
Power
| Property | Chicago & North Western class D1900 variant |
|---|---|
| Power source | steam |
| Estimated power | 1,174 kW (1,596 PS) |
| Starting effort | 98.3 kN |
Calculated values
| Property | Chicago & North Western class D1900 variant |
|---|---|
| Factor of adhesion | 1 : 4.12 |
| Optimal speed | 72 km/h |
| Power-to-weight ratio | 16.4 kW/t |
| Heating Surface Equivalent | 372.6 m² |
| Cylinder volume/HSE | 1 : 718.41 |
| Adhesive weight/Total | 1 : 1.74 |
| Tractive force/Heating surface | 1 : 7.33 |
| Grate area/Heating surface | 1 : 65.15 |
| Firebox/Tube surface | 1 : 14.16 |
