Compare locomotives
Add a locomotive
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 | rebuilt Q-2 |
| Built | 1928 |
| Manufacturers | St. Paul |
| Wheel arrangement | 1E1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 165108 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Northern (US) class P-1rebuilt Q-2 |
|---|---|
| Built | 1928 |
| Manufacturers | St. Paul |
| Wheel arrangement | 2-10-2 (Santa Fé) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Northern (US) class P-1rebuilt Q-2 |
|---|---|
| Wheelbase | 9.55 m |
| Total wheelbase | 25.46 m |
| Service mass | 165.1 t |
| Adhesion mass | 131.5 t |
| Total mass | 308.3 t |
| Rigid wheelbase | 6.71 m |
| Axle load | 26.3 t |
| Water capacity | 64,352 l |
| Fuel capacity | 21,955 l (oil) |
Boiler
| Property | Great Northern (US) class P-1rebuilt Q-2 |
|---|---|
| Grate area | 7.246 m² |
| Firebox surface | 33.631 m² |
| Tube heating surface | 414.627 m² |
| Evaporative heating surface | 448.258 m² |
| Superheater surface | 109.997 m² |
| Total heating surface | 558.3 m² |
Power plant
| Property | Great Northern (US) class P-1rebuilt Q-2 |
|---|---|
| Driver diameter | 1,600 mm |
| Boiler pressure | 14.5 bar |
| Expansion type | simple expansion |
| Cylinders | two, 737 x 813 mm |
Power
| Property | Great Northern (US) class P-1rebuilt Q-2 |
|---|---|
| Power source | steam |
| Estimated power | 2,796 kW (3,802 PS) |
| Starting effort | 339.2 kN |
Calculated values
| Property | Great Northern (US) class P-1rebuilt Q-2 |
|---|---|
| Factor of adhesion | 1 : 3.80 |
| Optimal speed | 50 km/h |
| Power-to-weight ratio | 16.9 kW/t |
| Heating Surface Equivalent | 836.4 m² |
| Cylinder volume/HSE | 1 : 828.23 |
| Adhesive weight/Total | 1 : 1.26 |
| Tractive force/Heating surface | 1 : 12.69 |
| Grate area/Heating surface | 1 : 77.04 |
| Firebox/Tube surface | 1 : 12.33 |
| Total/Superheater | 1 : 4.08 |
