Alamogordo & Sacramento Mountain 2-8-0 "Consolidation" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 103 (Locobase 12340)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 22, p. 82. Works numbers were 16494 in February 1899 and 17107 in October .

Gene Connelly's Baldwin list shows this as a tank engine, but the specs strongly suggest either 1) it had a tender too because the operating conditions were so dry, or 2) it did not have a tank at all.

In any case, the 104 retained its number when the owner changed tot he El Paso & Northeastern, but when the EP & NE was changed to the El Paso & Southwestern, 104 was renumbered.

The pair was substantially rebuilt as straightforward Consolidations in 1904; see Locobase 8688.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID12,340
RailroadAlamogordo & Sacramento Mountain
Number in Class2
Road Numbers103-104
Number Built2
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.33 / 3.76
Engine Wheelbase (ft / m)20.25 / 6.17
Ratio of driving wheelbase to overall engine wheebase 0.61
Overall Wheelbase (engine & tender) (ft / m)46.50 / 14.17
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)125,000 / 56,699
Engine Weight (lbs / kg)140,000 / 63,503
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)3500 / 13.26
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)4 / 3.60
Minimum weight of rail (calculated) (lb/yd / kg/m)52 / 26
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)21" x 24" / 533x610
Tractive Effort (lbs / kg)31,292 / 14193.83
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.99
Heating Ability
Firebox Area (sq ft / m2)138.40 / 12.86
Grate Area (sq ft / m2)27.87 / 2.59
Evaporative Heating Surface (sq ft / m2)2076 / 192.94
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2076 / 192.94
Evaporative Heating Surface/Cylinder Volume215.78
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4459
Same as above plus superheater percentage4459
Same as above but substitute firebox area for grate area22,144
Power L13529
Power MT248.96

All material Copyright ©
Wes Barris