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


Class Details by Steve Llanso of Sweat House Media

Class 101 (Locobase 12291)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 21, p. 233. Works number was 16103 in August 1898.

Specs called for this burly, short-stroke tank to haul 183 tons up a 5% grade that ran for 3 miles on the 20 miles (later 30 miles) of road.

Later operated by the El Paso & Northeastern, which became the El Paso & Southwestern. The EP & SW converted the 101 (by now 420) to an 0-8-0 switcher in 1912. Renumbered 1300 by the Espee and reclassed SE-1, the engine served until scrapped in July 1934.

Specifications by Steve Llanso of Sweat House Media
Class101
Locobase ID12,291
RailroadAlamogordo & Sacramento Mountain
CountryUSA
Whyte2-8-2T
Number in Class1
Road Numbers101 /
GaugeStd
Number Built1
BuilderBurnham, Williams & Co
Year1898
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)13 / 3.96
Engine Wheelbase (ft / m)28.83 / 8.79
Ratio of driving wheelbase to overall engine wheebase 0.45
Overall Wheelbase (engine & tender) (ft / m)28.83 / 8.79
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)136,000 / 61,689
Engine Weight (lbs / kg)168,000 / 76,204
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)168,000
Tender Water Capacity (gals / ML)2700 / 10.23
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd)57
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)160 / 13.80
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) 4.35
Heating Ability
Firebox Area (sq ft / m2)132 / 12.27
Grate Area (sq ft / m2)28 / 2.60
Evaporative Heating Surface (sq ft / m2)1809 / 168.12
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1809 / 168.12
Evaporative Heating Surface/Cylinder Volume188.02
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4480
Same as above plus superheater percentage4480
Same as above but substitute firebox area for grate area21,120
Power L13148
Power MT204.12