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Union Pacific classes 1820 and 1830
In 1900 and 1901, Baldwin built 28 similar four-cylinder Vauclain compound Ten-wheelers for the Union Pacific. The first ten were numbered 1820 to 1829 and had drivers of 69 inches, what led to the designation T-69. T...
| Union Pacific classes 1820 and 1830Remove | |
|---|---|
| Variant | 1820 simpled |
| Built | 1900 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2C |
| Gauge | 1435 mm |
| Length | 19360 mm |
| Service mass | 83325 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Union Pacific classes 1820 and 18301820 simpled |
|---|---|
| Built | 1900 |
| Manufacturers | Baldwin |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Union Pacific classes 1820 and 18301820 simpled |
|---|---|
| Length | 19.36 m |
| Wheelbase | 8.15 m |
| Total wheelbase | 16.56 m |
| Service mass | 83.3 t |
| Adhesion mass | 64.8 t |
| Total mass | 138.8 t |
| Rigid wheelbase | 4.42 m |
| Axle load | 23.1 t |
| Water capacity | 22,712 l |
| Fuel capacity | 10.9 t (coal) |
Boiler
| Property | Union Pacific classes 1820 and 18301820 simpled |
|---|---|
| Grate area | 3.008 m² |
| Firebox surface | 17.011 m² |
| Tube heating surface | 262.461 m² |
| Evaporative heating surface | 279.471 m² |
| Total heating surface | 279.5 m² |
Power plant
| Property | Union Pacific classes 1820 and 18301820 simpled |
|---|---|
| Driver diameter | 1,753 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 508 x 711 mm |
Power
| Property | Union Pacific classes 1820 and 18301820 simpled |
|---|---|
| Power source | steam |
| Estimated power | 858 kW (1,167 PS) |
| Starting effort | 122.7 kN |
Calculated values
| Property | Union Pacific classes 1820 and 18301820 simpled |
|---|---|
| Factor of adhesion | 1 : 5.18 |
| Optimal speed | 43 km/h |
| Power-to-weight ratio | 10.3 kW/t |
| Heating Surface Equivalent | 364.5 m² |
| Cylinder volume/HSE | 1 : 790.88 |
| Adhesive weight/Total | 1 : 1.29 |
| Tractive force/Heating surface | 1 : 9.17 |
| Grate area/Heating surface | 1 : 92.91 |
| Firebox/Tube surface | 1 : 15.43 |
