Locobase is intrigued by the calculations that must have underlay a 1920s decision concerning this locomotive. In Locobase 7359, we describe A & S's 12 4-4-0, a Pittsburgh LW product from 1881. We note that a later roster shows the engine to have been retired in 1919.
Retired, perhaps, but not scrapped, obviously, because 7 years later the engine was taken in hand by Baldwin and rebuilt as a 2-6-0? The math intrigues - the railroad takes a 45-year-old locomotive and puts much smaller drivers under a boiler that had to have been reworked. The cylinder volume remains the same and the heating surfaces are approximately equal, but what of this engine could have had an 1881 date stamp?
Whatever the reason (maybe the railroad could get money for repairs, but not new acquistions, e.g.), the revived #12 carried on another 8 years and was scrapped, for sure, in 1934.
The A & S had this Mogul as the most powerful locomotive of the 4 to 6 that remained in service in the 1910s. Locobase has a hunch that this locomotive, purchased used by the A & S, was one of the Missouri-Kansas-Texas Railway's D4 class of Moguls. The building dates are the same as are all the data.
By 1919, only four engines were still active.
| Specifications | ||
|---|---|---|
| Class | E | |
| Locobase ID | 8501 | 7361 |
| Railroad | Abilene & Southern | Abilene & Southern |
| Whyte | 2-6-0 | 2-6-0 |
| Road Numbers | 12 | 17 |
| Gauge | Std | Std |
| Builder | Baldwin | Burnham, Williams & Co |
| Year | 1926 | 1890 |
| Valve Gear | Walschaert | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase | 11.50' | 13.50' |
| Engine Wheelbase | 19.83' | 20.12' |
| Ratio of driving wheelbase to overall engine wheebase | 0.58 | 0.67 |
| Overall Wheelbase (engine & tender) | 48.72' | 46.36' |
| Axle Loading (Maximum Weight per Axle) | ||
| Weight on Drivers | 96000 lbs | 91000 lbs |
| Engine Weight | 111000 lbs | 104800 lbs |
| Tender Light Weight | 108000 lbs | 84200 lbs |
| Total Engine and Tender Weight | 219000 lbs | 189000 lbs |
| Tender Water Capacity | 5500 gals | 3500 gals |
| Tender Fuel Capacity (oil/coal) | 2100 gals | 8 tons |
| Minimum weight per yard of rail on which locomotive could run | 53.33 lb rail | 50.56 lb rail |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter | 50" | 57" |
| Boiler Pressure | 170 psi | 147 psi |
| Cylinders (dia x stroke) | 18" x 24" | 19" x 24" |
| Tractive Effort | 22473 lbs | 18992 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.27 | 4.79 |
| Heating Ability | ||
| Firebox Area | 126 sq. ft | 135 sq. ft |
| Grate Area | 19.10 sq. ft | 22.90 sq. ft |
| Evaporative Heating Surface | 1287 | 1551 |
| Superheating Surface | ||
| Combined Heating Surface | 1287 | 1551 |
| Evaporative Heating Surface/Cylinder Volume | 182.07 | 196.93 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 3247 | 3366.30 |
| Same as above plus superheater percentage | 3247 | 3366.30 |
| Same as above but substitute firebox area for grate area | 21420 | 19845 |
| Power L1 | 3842.00 | 3947.04 |
| Power MT | 264.69 | 286.87 |
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