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Great Northern (US) class Q-1
The first 30 2-10-2 locomotives ordered by the Great Northern were built by Baldwin in 1923. They were designated class Q-1 and numbered 2100 to 2129. Being one of the heaviest locomotives with this wheel arrangement,...
General
| Property | Great Northern (US) class Q-1 2115, 2119 |
|---|---|
| Built | 1923 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2-10-2 (Santa Fé) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Northern (US) class Q-1 2115, 2119 |
|---|---|
| Length | 31.42 m |
| Wheelbase | 10.01 m |
| Rigid wheelbase | 6.71 m |
| Total wheelbase | 28.14 m |
| Service weight | 191.6 t |
| Adhesive weight | 155.4 t |
| Axle load | 31.7 t |
| Total weight | 360.7 t |
| Water capacity | 83,279 l |
| Fuel capacity | 21,955 l (oil) |
Boiler
| Property | Great Northern (US) class Q-1 2115, 2119 |
|---|---|
| Grate area | 8.175 m² |
| Firebox surface | 37.997 m² |
| Tube heating surface | 476.5 m² |
| Evaporative heating surface | 514.498 m² |
| Superheater surface | 141.027 m² |
| Total heating surface | 655.5 m² |
Power plant
| Property | Great Northern (US) class Q-1 2115, 2119 |
|---|---|
| Driver diameter | 1,600 mm |
| Boiler pressure | 14.5 bar |
| Expansion type | simple expansion |
| Cylinders | two, 787 x 813 mm |
Power
| Property | Great Northern (US) class Q-1 2115, 2119 |
|---|---|
| Power source | steam |
| Estimated power | 2,834 kW (3,853 PS) |
| Starting effort | 387.6 kN |
Calculated values
| Property | Great Northern (US) class Q-1 2115, 2119 |
|---|---|
| Factor of adhesion | 1 : 3.93 |
| Optimal speed | 45 km/h |
| Power-to-weight ratio | 14.8 kW/t |
| Heating Surface Equivalent | 986.5 m² |
| Cylinder volume/HSE | 1 : 802.38 |
| Adhesive weight/Total | 1 : 1.23 |
| Tractive force/Heating surface | 1 : 12.35 |
| Grate area/Heating surface | 1 : 80.19 |
| Firebox/Tube surface | 1 : 12.54 |
| Total/Superheater | 1 : 3.65 |
