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Baltimore & Ohio class N-1
This locomotive was the first modern one the USA that used a duplex layout with all drivers in the same frame, but driven by separate sets of cylinders. Numbered 5600 and named “George H Emerson”, production was compl...
General
| Property | Baltimore & Ohio class N-1Remove |
|---|---|
| Built | 1937 |
| Manufacturers | Mount Clare |
| Wheel arrangement | 4-4-4-4 (Duplex) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Baltimore & Ohio class N-1Remove |
|---|---|
| Length | 35.67 m |
| Wheelbase | 14.87 m |
| Rigid wheelbase | 6.02 m |
| Total wheelbase | 31.66 m |
| Service weight | 177.6 t |
| Adhesive weight | 109 t |
| Axle load | 28 t |
| Total weight | 336.4 t |
| Water capacity | 83,279 l |
| Fuel capacity | 20.9 t (coal) |
Boiler
| Property | Baltimore & Ohio class N-1Remove |
|---|---|
| Grate area | 7.479 m² |
| Firebox surface | 62.895 m² |
| Tube heating surface | 392.051 m² |
| Evaporative heating surface | 454.947 m² |
| Superheater surface | 121.889 m² |
| Total heating surface | 576.8 m² |
Power plant
| Property | Baltimore & Ohio class N-1Remove |
|---|---|
| Driver diameter | 1,930 mm |
| Boiler pressure | 24.1 bar |
| Expansion type | simple expansion |
| Cylinders | four, 457 x 673 mm |
Power
| Property | Baltimore & Ohio class N-1Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,729 kW (5,070 PS) |
| Starting effort | 299.0 kN |
Calculated values
| Property | Baltimore & Ohio class N-1Remove |
|---|---|
| Factor of adhesion | 1 : 3.58 |
| Optimal speed | 76 km/h |
| Power-to-weight ratio | 21.0 kW/t |
| Heating Surface Equivalent | 1,013.2 m² |
| Cylinder volume/HSE | 1 : 436.26 |
| Adhesive weight/Total | 1 : 1.63 |
| Tractive force/Heating surface | 1 : 10.83 |
| Grate area/Heating surface | 1 : 77.13 |
| Firebox/Tube surface | 1 : 6.23 |
| Total/Superheater | 1 : 3.73 |
