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Milwaukee Road classes S1 to S3
The history of the 4-8-4 at Milwaukee Road began in 1930 with the single number 9700, which later became the 250, and was supplied by Baldwin. Its power was guaranteed by a boiler with a combustion chamber , thermic s...
| Milwaukee Road classes S1 to S3Remove | |
|---|---|
| Variant | |
| Built | 1943 |
| Manufacturers | ALCO |
| Wheel arrangement | 2D2 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 208653 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Milwaukee Road classes S1 to S3Remove |
|---|---|
| Built | 1943 |
| Manufacturers | ALCO |
| Wheel arrangement | 4-8-4 (Northern) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Milwaukee Road classes S1 to S3Remove |
|---|---|
| Wheelbase | 14.20 m |
| Total wheelbase | 29.12 m |
| Service mass | 208.7 t |
| Adhesion mass | 117.6 t |
| Total mass | 373.8 t |
| Rigid wheelbase | 6.02 m |
| Water capacity | 75,708 l |
| Fuel capacity | 22.7 t (coal) |
Boiler
| Property | Milwaukee Road classes S1 to S3Remove |
|---|---|
| Grate area | 8.937 m² |
| Firebox surface | 46.963 m² |
| Tube heating surface | 369.058 m² |
| Evaporative heating surface | 416.02 m² |
| Superheater surface | 133.595 m² |
| Total heating surface | 549.6 m² |
Power plant
| Property | Milwaukee Road classes S1 to S3Remove |
|---|---|
| Driver diameter | 1,880 mm |
| Boiler pressure | 17.2 bar |
| Expansion type | simple expansion |
| Cylinders | two, 660 x 813 mm |
Power
| Property | Milwaukee Road classes S1 to S3Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,505 kW (4,765 PS) |
| Starting effort | 276.3 kN |
Calculated values
| Property | Milwaukee Road classes S1 to S3Remove |
|---|---|
| Factor of adhesion | 1 : 4.18 |
| Optimal speed | 77 km/h |
| Power-to-weight ratio | 16.8 kW/t |
| Heating Surface Equivalent | 918.0 m² |
| Cylinder volume/HSE | 1 : 606.54 |
| Adhesive weight/Total | 1 : 1.77 |
| Tractive force/Heating surface | 1 : 10.50 |
| Grate area/Heating surface | 1 : 61.50 |
| Firebox/Tube surface | 1 : 7.86 |
| Total/Superheater | 1 : 3.11 |
