Abilene & Southern 4-6-0 "Ten-Wheeler" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 18 (Locobase 11724)
Data from Negative 7758, Degolyer Library collection of digitized Baldwin images, retrieved 26 October 2010 from [
] . See also DeGolyer, Volume 65, pp. 1+. (Thanks to Chris Hohl for his 4 November 2016 email noting the error (52" instead of 57") in the 18's driver diameter.) Works number was 54089 in November 1920.
This small, freight-drivered Ten-wheeler enjoyed a good measure of superheat, which also necessitated piston valves (9 1/2"/241 mm in diameter) for steam admission to the cylinders. It never strayed off the A & S rails, serving the line until its retirement in June 1947.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 18 |
| Locobase ID | 11724 |
| Railroad | Abilene & Southern |
| Country | USA |
| Whyte | 4-6-0 |
| Number in Class | 1 |
| Road Numbers | 18 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1920 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.33 / 3.45 |
| Engine Wheelbase (ft / m) | 21.58 / 6.58 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.53 |
| Overall Wheelbase (engine & tender) (ft / m) | 51.17 / 15.60 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 94,000 / 42,638 |
| Engine Weight (lbs / kg) | 126,000 / 57,153 |
| Tender Loaded Weight (lbs / kg) | 100,000 / 45,359 |
| Total Engine and Tender Weight (lbs / kg) | 226,000 / 102,512 |
| Tender Water Capacity (gals / ML) | 5000 / 18.94 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 10 / 9 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 52 / 26 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 57 / 1321 |
| Boiler Pressure (psi / kPa) | 190 / 1310 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 24" / 457x610 |
| Tractive Effort (lbs / kg) | 22,032 / 9993.56 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.27 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 131 - 2" / 51 |
| Flues (number - dia) (in / mm) | 21 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 12.50 / 3.81 |
| Firebox Area (sq ft / m2) | 108 / 10.04 |
| Grate Area (sq ft / m2) | 22.30 / 2.07 |
| Evaporative Heating Surface (sq ft / m2) | 1327 / 123.33 |
| Superheating Surface (sq ft / m2) | 312 / 29 |
| Combined Heating Surface (sq ft / m2) | 1639 / 152.33 |
| Evaporative Heating Surface/Cylinder Volume | 187.69 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4237 |
| Same as above plus superheater percentage | 5042 |
| Same as above but substitute firebox area for grate area | 24,419 |
| Power L1 | 11,935 |
| Power MT | 839.75 |