US Railroad Administration Light Santa Fe
Southern Railway (USA) class Ss-1, Seaboard Air Line class B-1, Boston & Albany class Z-1, Duluth, Missabe & Northern class E-1, and Ann Arbor class L
The USRA Light Santa Fe was produced in smaller numbers than its heavy sister. Compared to this, it had drivers which were six inches smaller and a cylinder diameter that was three inches smaller. It shared the firebox design and the number of boiler tubes with the 2-6-6-2 Mallet, but the combustion chamber and the tubes were shorter.
Of 94 Light Santa Fes built, 75 came from ALCO and 19 from Baldwin. The biggest operator was the Southern, which used 50 of them as class Ss-1. The Seaboard Air Line got 15, the Boston & Albany and Duluth, Missabe & Northern got ten each, the Chicago & Western Indiana five and the Ann Arbor four.
Technical data
General
- Built
- 1918-1919
- Manufacturers
- ALCO, Baldwin
- Wheel arrangement
- 2-10-2 (Santa Fé)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length loco
- 16.10 m
- Wheelbase
- 12.29 m
- Total wheelbase
- 23.15 m
- Service mass
- 159.7 t
- Adhesion mass
- 124.3 t
- Total mass
- 245.1 t
- Rigid wheelbase
- 6.40 m
- Axle load
- 27.2 t
- Water capacity
- 37,854 l
- Fuel capacity
- 14.5 t (coal)
Boiler
- Grate area
- 7.089 m²
- Firebox surface
- 34.653 m²
- Tube heating surface
- 398.833 m²
- Evaporative heating surface
- 433.486 m²
- Superheater surface
- 100.8 m²
- Total heating surface
- 534.3 m²
Power plant
- Driver diameter
- 1,448 mm
- Boiler pressure
- 13.8 bar
- Expansion type
- simple expansion
- Cylinders
- two, 686 x 813 mm
Power
- Power source
- steam
- Estimated power
- 2,535 kW (3,447 PS)
- Starting effort
- 309.5 kN
Calculated values
- Factor of adhesion
- 1 : 3.94
- Optimal speed
- 50 km/h
- Power-to-weight ratio
- 15.9 kW/t
- Heating Surface Equivalent
- 808.4 m²
- Cylinder volume/HSE
- 1 : 742.85
- Adhesive weight/Total
- 1 : 1.28
- Tractive force/Heating surface
- 1 : 12.10
- Grate area/Heating surface
- 1 : 75.37
- Firebox/Tube surface
- 1 : 11.51
- Total/Superheater
- 1 : 4.30
