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Norfolk & Western classes M and M1
In order to be able to accommodate a longer boiler on the Consolidation, the Norfolk & Western chose the 4-8-0 “Twelve-wheeler” wheel arrangement instead of the Mikado. The aim was to achieve a higher adhesive weight ...
| Norfolk & Western classes M and M1Remove | |
|---|---|
| Variant | |
| Built | 1906-1907 |
| Manufacturers | ALCO;Baldwin;N&W Roanoke Shops |
| Wheel arrangement | 2D |
| Gauge | 1435 mm |
| Length | |
| Service mass | 93531 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Norfolk & Western classes M and M1Remove |
|---|---|
| Built | 1906-1907 |
| Manufacturers | ALCO, Baldwin, N&W Roanoke Shops |
| Wheel arrangement | 4-8-0 (Twelve-wheeler) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Norfolk & Western classes M and M1Remove |
|---|---|
| Wheelbase | 7.44 m |
| Total wheelbase | 17.79 m |
| Service mass | 93.5 t |
| Adhesion mass | 77 t |
| Total mass | 169.5 t |
| Rigid wheelbase | 4.72 m |
| Axle load | 19.3 t |
| Water capacity | 34,069 l |
| Fuel capacity | 12.7 t (coal) |
Boiler
| Property | Norfolk & Western classes M and M1Remove |
|---|---|
| Grate area | 4.181 m² |
| Firebox surface | 16.072 m² |
| Tube heating surface | 243.778 m² |
| Evaporative heating surface | 259.85 m² |
| Total heating surface | 259.9 m² |
Power plant
| Property | Norfolk & Western classes M and M1Remove |
|---|---|
| Driver diameter | 1,422 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 533 x 762 mm |
Power
| Property | Norfolk & Western classes M and M1Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,044 kW (1,419 PS) |
| Starting effort | 178.6 kN |
Calculated values
| Property | Norfolk & Western classes M and M1Remove |
|---|---|
| Factor of adhesion | 1 : 4.23 |
| Optimal speed | 35 km/h |
| Power-to-weight ratio | 11.2 kW/t |
| Heating Surface Equivalent | 340.2 m² |
| Cylinder volume/HSE | 1 : 1,001.00 |
| Adhesive weight/Total | 1 : 1.21 |
| Tractive force/Heating surface | 1 : 14.36 |
| Grate area/Heating surface | 1 : 62.15 |
| Firebox/Tube surface | 1 : 15.17 |
