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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 | 1922 |
| Manufacturers | Martinsburg |
| Wheel arrangement | (1D)D ma |
| Gauge | 1435 mm |
| Length | |
| Service mass | 223168 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Seaboard Air Line class ARemove |
|---|---|
| Built | 1922 |
| Manufacturers | Martinsburg |
| Wheel arrangement | 2-8-8-0 (Bull Moose) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Seaboard Air Line class ARemove |
|---|---|
| Wheelbase | 16.26 m |
| Total wheelbase | 29.95 m |
| Service mass | 223.2 t |
| Adhesion mass | 207.2 t |
| Total mass | 322.5 t |
| Rigid wheelbase | 4.71 m |
| Axle load | 27.8 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 | 36.975 m² |
| Tube heating surface | 513.197 m² |
| Evaporative heating surface | 550.172 m² |
| Superheater surface | 128.206 m² |
| Total heating surface | 678.4 m² |
Power plant
| Property | Seaboard Air Line class ARemove |
|---|---|
| Driver diameter | 1,600 mm |
| Boiler pressure | 15.5 bar |
| Expansion type | simple expansion |
| Cylinders | four, 635 x 813 mm |
Power
| Property | Seaboard Air Line class ARemove |
|---|---|
| Power source | steam |
| Estimated power | 2,312 kW (3,143 PS) |
| Starting effort | 540.1 kN |
Calculated values
| Property | Seaboard Air Line class ARemove |
|---|---|
| Factor of adhesion | 1 : 3.76 |
| Optimal speed | 26 km/h |
| Power-to-weight ratio | 10.4 kW/t |
| Heating Surface Equivalent | 991.5 m² |
| Cylinder volume/HSE | 1 : 1,038.50 |
| Adhesive weight/Total | 1 : 1.08 |
| Tractive force/Heating surface | 1 : 16.63 |
| Grate area/Heating surface | 1 : 82.98 |
| Firebox/Tube surface | 1 : 13.88 |
| Total/Superheater | 1 : 4.29 |
