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Louisville & Nashville class M-1
The L&N used a total of 42 Berkshires which were commonly known as “Big Emmas”. They were similar to the Berkshires designed by the Van Sweringens for the Nickel Plate Road and also used by other railroads, but they w...
General
| Property | Louisville & Nashville class M-1Remove |
|---|---|
| Built | 1942, 1949 |
| Manufacturers | Baldwin, Lima |
| Wheel arrangement | 2-8-4 (Berkshire) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Louisville & Nashville class M-1Remove |
|---|---|
| Wheelbase | 12.90 m |
| Rigid wheelbase | 5.56 m |
| Total wheelbase | 28.47 m |
| Service weight | 202.8 t |
| Adhesive weight | 121.7 t |
| Axle load | 30.9 t |
| Total weight | 377.1 t |
| Water capacity | 83,279 l |
| Fuel capacity | 22.7 t (coal) |
Boiler
| Property | Louisville & Nashville class M-1Remove |
|---|---|
| Grate area | 8.38 m² |
| Firebox surface | 43.042 m² |
| Tube heating surface | 390.908 m² |
| Evaporative heating surface | 433.951 m² |
| Superheater surface | 177.259 m² |
| Total heating surface | 611.2 m² |
Power plant
| Property | Louisville & Nashville class M-1Remove |
|---|---|
| Driver diameter | 1,753 mm |
| Boiler pressure | 18.3 bar |
| Expansion type | simple expansion |
| Cylinders | two, 635 x 813 mm |
Power
| Property | Louisville & Nashville class M-1Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,430 kW (4,664 PS) |
| Starting effort | 290.4 kN |
| Starting effort booster | 62.72 kN |
Calculated values
| Property | Louisville & Nashville class M-1Remove |
|---|---|
| Factor of adhesion | 1 : 4.11 |
| Optimal speed | 72 km/h |
| Power-to-weight ratio | 16.9 kW/t |
| Heating Surface Equivalent | 1,003.7 m² |
| Cylinder volume/HSE | 1 : 512.93 |
| Adhesive weight/Total | 1 : 1.67 |
| Tractive force/Heating surface | 1 : 9.92 |
| Grate area/Heating surface | 1 : 72.94 |
| Firebox/Tube surface | 1 : 9.08 |
| Total/Superheater | 1 : 2.45 |
