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Seaboard Air Line classes R-1 and R-2
The Seaboard Air Line operated ten 2-6-6-4 articulated locomotives built by Baldwin in two batches of five in 1935 and 1937. Although smaller than the Norfolk & Western class A, they were still substantial locomotives...
| Seaboard Air Line classes R-1 and R-2Remove | |
|---|---|
| Variant | Standard |
| Built | 1935, 1937 |
| Manufacturers | Baldwin |
| Wheel arrangement | (1C)C2 ma |
| Gauge | 1435 mm |
| Length | |
| Service mass | 217725 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Seaboard Air Line classes R-1 and R-2 Standard Remove |
|---|---|
| Built | 1935, 1937 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2-6-6-4 |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Seaboard Air Line classes R-1 and R-2 Standard Remove |
|---|---|
| Wheelbase | 17.50 m |
| Total wheelbase | 29.79 m |
| Service mass | 217.7 t |
| Adhesion mass | 149.7 t |
| Total mass | 358.4 t |
| Rigid wheelbase | 3.66 m |
| Axle load | 24.9 t |
| Water capacity | 60,567 l |
| Fuel capacity | 21.8 t (coal) |
Boiler
| Property | Seaboard Air Line classes R-1 and R-2 Standard Remove |
|---|---|
| Grate area | 8.947 m² |
| Firebox surface | 47.845 m² |
| Tube heating surface | 464.33 m² |
| Evaporative heating surface | 512.175 m² |
| Superheater surface | 222.689 m² |
| Total heating surface | 734.9 m² |
Power plant
| Property | Seaboard Air Line classes R-1 and R-2 Standard Remove |
|---|---|
| Driver diameter | 1,753 mm |
| Boiler pressure | 15.9 bar |
| Expansion type | simple expansion |
| Cylinders | four, 559 x 762 mm |
Power
| Property | Seaboard Air Line classes R-1 and R-2 Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,430 kW (4,664 PS) |
| Starting effort | 366.0 kN |
Calculated values
| Property | Seaboard Air Line classes R-1 and R-2 Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.01 |
| Optimal speed | 58 km/h |
| Power-to-weight ratio | 15.8 kW/t |
| Heating Surface Equivalent | 1,196.8 m² |
| Cylinder volume/HSE | 1 : 624.60 |
| Adhesive weight/Total | 1 : 1.45 |
| Tractive force/Heating surface | 1 : 10.40 |
| Grate area/Heating surface | 1 : 82.14 |
| Firebox/Tube surface | 1 : 9.70 |
| Total/Superheater | 1 : 2.30 |
