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 http://digitalcollections.smu.edu/cdm4/item_viewer.php . 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 Sweat House Media
Class18
Locobase ID11,724
RailroadAbilene & Southern
CountryUSA
Whyte4-6-0
Number in Class1
Road Numbers18
GaugeStd
Number Built1
BuilderBaldwin
Year1920
Valve GearWalschaert
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 wheebase 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 / ML/MT)10 / 9.10
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 / 13.10
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
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 Volume187.73
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4237
Same as above plus superheater percentage5042
Same as above but substitute firebox area for grate area24,419
Power L111,938
Power MT839.96