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Milwaukee Road class A2
The class A2 designated the first Atlantics on the Milwaukee Road to have a Vauclain-type compound engine . This means that there was a high and a low pressure cylinder on each side, which were connected to a common c...
| Milwaukee Road class A2Remove | |
|---|---|
| Variant | A2a |
| Built | 1902 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2B1 |
| Gauge | 1435 mm |
| Length | 21766 mm |
| Service mass | 80295 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Milwaukee Road class A2A2a |
|---|---|
| Built | 1902 |
| Manufacturers | Baldwin |
| Wheel arrangement | 4-4-2 (Atlantic) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Milwaukee Road class A2A2a |
|---|---|
| Length | 21.77 m |
| Wheelbase | 8.52 m |
| Total wheelbase | 18.53 m |
| Service mass | 80.3 t |
| Adhesion mass | 41.7 t |
| Total mass | 139.9 t |
| Rigid wheelbase | 2.21 m |
| Water capacity | 26,498 l |
| Fuel capacity | 9.1 t (coal) |
Boiler
| Property | Milwaukee Road class A2A2a |
|---|---|
| Grate area | 4.34 m² |
| Firebox surface | 16.072 m² |
| Tube heating surface | 279.453 m² |
| Evaporative heating surface | 295.525 m² |
| Total heating surface | 295.5 m² |
Power plant
| Property | Milwaukee Road class A2A2a |
|---|---|
| Driver diameter | 2,140 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | compound |
| Cylinders | four, HP: 381 x 711 mm and LP: 635 x 711 mm |
Power
| Property | Milwaukee Road class A2A2a |
|---|---|
| Power source | steam |
| Estimated power | 1,193 kW (1,622 PS) |
| Starting effort | 83.2 kN |
| Starting effort simple | 99.8 kN |
Calculated values
| Property | Milwaukee Road class A2A2a |
|---|---|
| Factor of adhesion | 1 : 4.92 |
| Optimal speed | 89 km/h |
| Power-to-weight ratio | 14.9 kW/t |
| Heating Surface Equivalent | 375.9 m² |
| Cylinder volume/HSE | 1 : 1,030.63 |
| Adhesive weight/Total | 1 : 1.92 |
| Tractive force/Heating surface | 1 : 5.88 |
| Grate area/Heating surface | 1 : 68.09 |
| Firebox/Tube surface | 1 : 17.39 |
