Santa Fe class 1480
The Santa Fe class 1480 consisted of 23 Atlantics, which they built in 1910 at their own factory in Albuquerque. They initially had a three-dome boiler, a Jacobs-Shupert firebox and a four-cylinder compound engine. The steam was taken from the rear dome, went past the sand dome into the front dome and from there via an external pipe into the reheater in the smokebox. Also noticeable was the long wheelbase between the second driving axle and the trailing axle.
Their nickname among the crews was “Bull Moosers” and the area of operation was lighter express trains. Following the general trend of the time, 14 of the 23 were rebuilt from 1920 into superheated locomotives with two cylinders of the same size. The wheelbase between the second driving axle and the trailing axle was also shortened by more than three feet. The first was retired in 1926, the last in 1953.
Technical data
General
| Property | as built | simpled/Superheated |
|---|---|---|
| Built | 1910 | 1920 |
| Manufacturers | Albuquerque | |
| Wheel arrangement | 4-4-2 (Atlantic) | |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | as built | simpled/Superheated |
|---|---|---|
| Wheelbase | 9.96 m | 8.81 m |
| Total wheelbase | 19.53 m | 18.54 m |
| Service mass | 105.1 t | 104.1 t |
| Adhesion mass | 50.9 t | 53.6 t |
| Total mass | 179.2 t | 185.4 t |
| Rigid wheelbase | 2.08 m | |
| Axle load | 26.2 t | 26.8 t |
| Water capacity | 34,069 l | |
| Fuel capacity | 1.5 t (oil) | |
Boiler
| Property | as built | simpled/Superheated |
|---|---|---|
| Grate area | 4.459 m² | |
| Firebox surface | 17.652 m² | 20.717 m² |
| Tube heating surface | 215.349 m² | 201.414 m² |
| Evaporative heating surface | 233.001 m² | 222.131 m² |
| Total heating surface | 233.0 m² | 264.5 m² |
| Superheater surface | 42.364 m² | |
Power plant
| Property | as built | simpled/Superheated |
|---|---|---|
| Driver diameter | 1,854 mm | |
| Boiler pressure | 15.2 bar | 13.8 bar |
| Expansion type | compound | simple expansion |
| Cylinders | four, HP: 381 x 660 mm and LP: 635 x 660 mm | two, 559 x 660 mm |
Power
| Property | as built | simpled/Superheated |
|---|---|---|
| Power source | steam | |
| Estimated power | 1,193 kW (1,622 PS) | 1,491 kW (2,027 PS) |
| Starting effort | 98.0 kN | 130.4 kN |
| Starting effort simple | 117.6 kN | |
Calculated values
| Property | as built | simpled/Superheated |
|---|---|---|
| Factor of adhesion | 1 : 5.09 | 1 : 4.03 |
| Optimal speed | 74 km/h | 71 km/h |
| Power-to-weight ratio | 11.4 kW/t | 14.3 kW/t |
| Heating Surface Equivalent | 321.3 m² | 410.4 m² |
| Cylinder volume/HSE | 1 : 1,119.73 | 1 : 789.20 |
| Adhesive weight/Total | 1 : 2.07 | 1 : 1.94 |
| Tractive force/Heating surface | 1 : 8.79 | 1 : 10.29 |
| Grate area/Heating surface | 1 : 52.25 | 1 : 59.32 |
| Firebox/Tube surface | 1 : 12.20 | 1 : 9.72 |
| Total/Superheater | 1 : 5.24 |
