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. 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 updated link to the NPS history.) Works number was 16103 in August 1898.
See Locobase 12068 for a history of the A&SM.
Specs called for this burly, short-stroke tank to haul 183 tons up a 5% grade that ran for 3 miles (5 km) on the 20 miles (later 32 miles/51.5 km to Russia, NM) 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.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 101 |
| Locobase ID | 12291 |
| Railroad | Alamogordo & Sacramento Mountain |
| Country | USA |
| Whyte | 2-8-2T |
| Number in Class | 1 |
| Road Numbers | 101/201/401/420/1300 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Burnham, Williams & Co |
| Year | 1898 |
| Valve Gear | Stephenson |
| 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 wheelbase | 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) | |
| Tender Water Capacity (gals / ML) | 2700 / 10.23 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 57 / 28.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 46 / 1168 |
| Boiler Pressure (psi / kPa) | 160 / 1380 |
| 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 | |
| Tubes (number - dia) (in / mm) | 258 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.50 / 3.81 |
| 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 Volume | 188.05 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4480 |
| Same as above plus superheater percentage | 4480 |
| Same as above but substitute firebox area for grate area | 21,120 |
| Power L1 | 3148 |
| Power MT | 204.12 |