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Seaboard Air Line class A
In 1918, the Seaboard Air Line received 16 2-8-8-2 Mallets from ALCO-Richmond to move fast, heavy freights on their main line between Richmond, Virginia and Hamlet, North Carolina. After the wartime traffic had ended,...
| Seaboard Air Line class ARemove | |
|---|---|
| Variant | |
| Built | 1918 |
| Manufacturers | ALCO |
| Wheel arrangement | (1D)D1 ma |
| Gauge | 1435 mm |
| Length | |
| Service mass | 225436 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Seaboard Air Line class ARemove |
|---|---|
| Built | 1918 |
| Manufacturers | ALCO |
| Wheel arrangement | 2-8-8-2 (Mikado Mallet) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Seaboard Air Line class ARemove |
|---|---|
| Wheelbase | 16.26 m |
| Total wheelbase | 29.95 m |
| Service mass | 225.4 t |
| Adhesion mass | 172.4 t |
| Total mass | 324.8 t |
| Rigid wheelbase | 4.71 m |
| Axle load | 21.5 t |
| Water capacity | 45,425 l |
| Fuel capacity | 18.1 t (coal) |
Boiler
| Property | Seaboard Air Line class ARemove |
|---|---|
| Grate area | 8.175 m² |
| Firebox surface | 36.325 m² |
| Tube heating surface | 516.448 m² |
| Evaporative heating surface | 552.774 m² |
| Superheater surface | 135.639 m² |
| Total heating surface | 688.4 m² |
Power plant
| Property | Seaboard Air Line class ARemove |
|---|---|
| Driver diameter | 1,600 mm |
| Boiler pressure | 14.5 bar |
| Expansion type | compound |
| Cylinders | four, HP: 673 x 813 mm and LP: 1,067 x 813 mm |
Power
| Property | Seaboard Air Line class ARemove |
|---|---|
| Power source | steam |
| Estimated power | 2,237 kW (3,041 PS) |
| Starting effort | 405.2 kN |
| Starting effort simple | 486.2 kN |
Calculated values
| Property | Seaboard Air Line class ARemove |
|---|---|
| Factor of adhesion | 1 : 4.17 |
| Optimal speed | 34 km/h |
| Power-to-weight ratio | 9.9 kW/t |
| Heating Surface Equivalent | 1,005.7 m² |
| Cylinder volume/HSE | 1 : 1,297.59 |
| Adhesive weight/Total | 1 : 1.31 |
| Tractive force/Heating surface | 1 : 12.29 |
| Grate area/Heating surface | 1 : 84.21 |
| Firebox/Tube surface | 1 : 14.22 |
| Total/Superheater | 1 : 4.08 |
