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. See also "Logging Railroad Technology" in the Logging Railroads of the Lincoln National Forest, New Mexico history at [
], last accessed 5 December 2024. (Thanks to Chris Hohl for his 6 November 2024 email supplying the updated link to the NPS history and for noting the changes in fuel.) Works numbers were 16494 in February 1899 and 17107 in October .
See Locobase 12068 for a history of the A&SM.
A year after the A&SM took delivery of the 2-8-2T descrbed in Locbase 12291, This pair of Consolidations designed with the same power and very similar firebox dimensions roling on a smaller adhesion wheelbase supplemented the motive power roster.
The NPS history noted that these two Consolidations initially burned wood; Chris Hohl noted the tender carried an impressive 6 cords.After the El Paso & Southwestern Railroad assumed control in 1905, the railroad converted the two coal-burners to oil (see Locobase 8688).The NPS history notes that a tender load of coal or oil was sufficient to travel the length of track from Alamogordo to Russia at end of track.
The 104 retained its number when the owner changed to the El Paso & Northeastern, but when the EP&NE was changed to the El Paso & Southwestern, 104 was renumbered 186. Water refills could be found in Alamogordo, Wooten, and Cloudcroft. At some point, Wooten also supplied the chemical needed to tame the hard water endemic to the region.
See Locobase 8688.for the oil-burning modification.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 103 |
| Locobase ID | 12340 |
| Railroad | Alamogordo & Sacramento Mountain |
| Country | USA |
| Whyte | 2-8-0 |
| Number in Class | 2 |
| Road Numbers | 103-104 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Burnham, Williams & Co |
| Year | 1899 |
| Valve Gear | Stephenson |
| 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 wheelbase | 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 / Liters/MT) | 4 / 4 |
| 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 / 1100 |
| 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 | |
| Tubes (number - dia) (in / mm) | 306 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.31 / 3.75 |
| 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 Volume | 215.80 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4459 |
| Same as above plus superheater percentage | 4459 |
| Same as above but substitute firebox area for grate area | 22,144 |
| Power L1 | 3530 |
| Power MT | 249.03 |