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Milwaukee Road class F7
To replace the Pacifics on the Twin Cities Hiawatha, the Milwaukee Road introduced a new type of Hudson or Baltic locomotives in 1938. The six locomotives were built by ALCO-Schenectady, received the numbers 100 to 10...
General
| Property | Milwaukee Road class F7Remove |
|---|---|
| Built | 1938 |
| Manufacturers | ALCO |
| Wheel arrangement | 4-6-4 (Hudson) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Milwaukee Road class F7Remove |
|---|---|
| Wheelbase | 12.90 m |
| Rigid wheelbase | 4.47 m |
| Total wheelbase | 27.38 m |
| Service weight | 188.2 t |
| Adhesive weight | 98 t |
| Axle load | 32.7 t |
| Total weight | 358.3 t |
| Water capacity | 75,708 l |
| Fuel capacity | 22.7 t (coal) |
Boiler
| Property | Milwaukee Road class F7Remove |
|---|---|
| Grate area | 8.965 m² |
| Firebox surface | 42.55 m² |
| Tube heating surface | 344.485 m² |
| Evaporative heating surface | 387.034 m² |
| Superheater surface | 157.471 m² |
| Total heating surface | 544.5 m² |
Power plant
| Property | Milwaukee Road class F7Remove |
|---|---|
| Driver diameter | 2,134 mm |
| Boiler pressure | 20.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 597 x 762 mm |
Power
| Property | Milwaukee Road class F7Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,729 kW (5,070 PS) |
| Top speed | 193 km/h |
| Starting effort | 223.7 kN |
Calculated values
| Property | Milwaukee Road class F7Remove |
|---|---|
| Factor of adhesion | 1 : 4.30 |
| Optimal speed | 101 km/h |
| Power-to-weight ratio | 19.8 kW/t |
| Heating Surface Equivalent | 914.7 m² |
| Cylinder volume/HSE | 1 : 466.22 |
| Adhesive weight/Total | 1 : 1.92 |
| Tractive force/Heating surface | 1 : 8.58 |
| Grate area/Heating surface | 1 : 60.74 |
| Firebox/Tube surface | 1 : 8.10 |
| Total/Superheater | 1 : 2.46 |
