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Great Northern (US) class P-1
The Great Northern was one of the first railroads in the United States to order Mountain locomotives. The manufacturer Lima saw these as Mikados, which had a two-axle forward bogie for better running characteristics i...
| Great Northern (US) class P-1Remove | |
|---|---|
| Variant | P-1 |
| Built | 1914 |
| Manufacturers | Lima |
| Wheel arrangement | 2D1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 147871 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Northern (US) class P-1P-1 |
|---|---|
| Built | 1914 |
| Manufacturers | Lima |
| Wheel arrangement | 4-8-2 (Mountain) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Northern (US) class P-1P-1 |
|---|---|
| Wheelbase | 11.58 m |
| Total wheelbase | 21.74 m |
| Service mass | 147.9 t |
| Adhesion mass | 98.9 t |
| Total mass | 220.9 t |
| Rigid wheelbase | 5.11 m |
| Axle load | 24.9 t |
| Water capacity | 30,283 l |
| Fuel capacity | 13.6 t (coal) |
Boiler
| Property | Great Northern (US) class P-1P-1 |
|---|---|
| Grate area | 7.246 m² |
| Firebox surface | 31.587 m² |
| Tube heating surface | 390.193 m² |
| Evaporative heating surface | 421.78 m² |
| Superheater surface | 90.581 m² |
| Total heating surface | 512.4 m² |
Power plant
| Property | Great Northern (US) class P-1P-1 |
|---|---|
| Driver diameter | 1,575 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 711 x 813 mm |
Power
| Property | Great Northern (US) class P-1P-1 |
|---|---|
| Power source | steam |
| Estimated power | 2,461 kW (3,346 PS) |
| Starting effort | 275.4 kN |
Calculated values
| Property | Great Northern (US) class P-1P-1 |
|---|---|
| Factor of adhesion | 1 : 3.52 |
| Optimal speed | 55 km/h |
| Power-to-weight ratio | 16.6 kW/t |
| Heating Surface Equivalent | 760.9 m² |
| Cylinder volume/HSE | 1 : 848.74 |
| Adhesive weight/Total | 1 : 1.50 |
| Tractive force/Heating surface | 1 : 11.23 |
| Grate area/Heating surface | 1 : 70.71 |
| Firebox/Tube surface | 1 : 12.35 |
| Total/Superheater | 1 : 4.66 |
