Locobase hasn't been able to establish the original owner of this Eight-wheeler. The MoPac roster published on http://www.trainweb.org/screamingeagle/roster_ab&so.html, last accessed on 24 July 2006, shows that this locomotive was retired in 1919. But a Texas & Pacific diagram book shows instead that this locomotive was converted to a 2-6-0 by Baldwin in 1926; see 8500.
The Abilene & Southern Railway Company was a 96-mile short line that connected Ballinger, Texas to Hamlin farther north. Laid between 1909 and 1911, the railway first ran south from Abilene to Ballinger, then north to Hamlin.
According to Bob Johnson of the "Frontier Trails" website http://www.frontiertrails.com/oldwest/Abilene.htm (accessed 1 Jan 2006), "...The concept of the line was to connect small west central Texas fertile agriculture towns to the main line between Fort Worth and Denver at Abilene." The site lists as the principal stops (with mileposts):
* Mile Post 0.0 Ballinger
* Mile Post 16 Winters
* Mile Post 27 Bradshaw
* Mile Post 34 Ovalo
* Mile Post 37 Tuscola
* Mile Post 55 Abilene
* Mile Post 79 Anson
* Mile Post 87 Radium
* Mile Post 96 Hamlin
The T & P took over the road in 1926. The line to Hamlin was abandoned in 1937 and the Winters-Ballinger section closed in 1972. The Missouri Pacific took over the rest in 1978. (See also the Handbook of Texas site at http://www.tsha.utexas.edu/handbook/online/articles/AA/eqa2.html (also accessed on 1 Jan 2006) and the Abilene Reporter News article from 26 Jan 2006, preserved online at http://www.reporter-news.com/abil/nw_lc_inside_abilene/article/0,1874,ABIL_7956_4420984,00.html and accessed 24 July 2006.
The A & S Eight-wheeler was "used", but its provenance is unknown to Locobase. A comparison with a very similar engine from another builder in the same year -- the Union Pacific's 780 class of 10 locomotives delivered by Brooks -- shows an identically sized boiler and the same cylinder volume, but the Brooks engine had slightly larger grate, 1" taller drivers, and a pressure set at 150 psi. The A & S engine put 5 1/2 more tons on the drivers.
| Specifications | ||
|---|---|---|
| Class | C | C |
| Locobase ID | 7359 | 7360 |
| Railroad | Abilene & Southern | Abilene & Southern |
| Whyte | 4-4-0 | 4-4-0 |
| Road Numbers | 12 | 13 |
| Gauge | Std | Std |
| Builder | Pittsburgh | Burnham, Parry, Williams & Co |
| Year | 1884 | 1888 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase | 9.25' | 8.85' |
| Engine Wheelbase | 23.50' | 24.75' |
| Ratio of driving wheelbase to overall engine wheebase | 0.39 | 0.36 |
| Overall Wheelbase (engine & tender) | 47.71' | 48.79' |
| Axle Loading (Maximum Weight per Axle) | ||
| Weight on Drivers | 72000 lbs | 74000 lbs |
| Engine Weight | 107630 lbs | 107540 lbs |
| Tender Light Weight | 70870 lbs | 82460 lbs |
| Total Engine and Tender Weight | 178500 lbs | 190000 lbs |
| Tender Water Capacity | 3500 gals | 4000 gals |
| Tender Fuel Capacity (oil/coal) | 12 tons | 12 tons |
| Minimum weight per yard of rail on which locomotive could run | 60 lb rail | 62 lb rail |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter | 63" | 62" |
| Boiler Pressure | 140 psi | 140 psi |
| Cylinders (dia x stroke) | 18" x 24" | 18" x 26" |
| Tractive Effort | 14688 lbs | 16169 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.90 | 4.58 |
| Heating Ability | ||
| Firebox Area | 130 sq. ft | 110.60 sq. ft |
| Grate Area | 19 sq. ft | 17 sq. ft |
| Evaporative Heating Surface | 1267 | 1426 |
| Superheating Surface | ||
| Combined Heating Surface | 1267 | 1426 |
| Evaporative Heating Surface/Cylinder Volume | 179.24 | 186.22 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 2660 | 2380 |
| Same as above plus superheater percentage | 2660 | 2380 |
| Same as above but substitute firebox area for grate area | 18200 | 15484 |
| Power L1 | 3987 | 3739 |
| Power MT | 244.16 | 222.79 |
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