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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...
General
| Property | Milwaukee Road class A2 A2c |
|---|---|
| Built | 1908 |
| Manufacturers | Baldwin |
| Wheel arrangement | 4-4-2 (Atlantic) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Milwaukee Road class A2 A2c |
|---|---|
| Length | 21.77 m |
| Wheelbase | 8.90 m |
| Rigid wheelbase | 2.24 m |
| Total wheelbase | 18.62 m |
| Service weight | 95.4 t |
| Adhesive weight | 49.3 t |
| Total weight | 155.6 t |
| Water capacity | 26,498 l |
| Fuel capacity | 9.1 t (coal) |
Boiler
| Property | Milwaukee Road class A2 A2c |
|---|---|
| Grate area | 4.181 m² |
| Firebox surface | 19.881 m² |
| Tube heating surface | 276.294 m² |
| Evaporative heating surface | 296.175 m² |
| Total heating surface | 296.2 m² |
Power plant
| Property | Milwaukee Road class A2 A2c |
|---|---|
| Driver diameter | 2,159 mm |
| Boiler pressure | 15.2 bar |
| Expansion type | compound |
| Cylinders | four, HP: 381 x 711 mm and LP: 635 x 711 mm |
Power
| Property | Milwaukee Road class A2 A2c |
|---|---|
| Power source | steam |
| Estimated power | 1,230 kW (1,672 PS) |
| Starting effort | 90.7 kN |
| Starting effort simple | 108.8 kN |
Calculated values
| Property | Milwaukee Road class A2 A2c |
|---|---|
| Factor of adhesion | 1 : 5.34 |
| Optimal speed | 84 km/h |
| Power-to-weight ratio | 12.9 kW/t |
| Heating Surface Equivalent | 395.6 m² |
| Cylinder volume/HSE | 1 : 979.32 |
| Adhesive weight/Total | 1 : 1.93 |
| Tractive force/Heating surface | 1 : 6.39 |
| Grate area/Heating surface | 1 : 70.84 |
| Firebox/Tube surface | 1 : 13.90 |
