Ocala & Southwestern / Ocilla Southern 4-6-0 "Ten-wheeler" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 102 (Locobase 13808)

Data from Baldwin Locomotive Works datacard as digitized by the DeGolyer Library of Southern Methodist University, Volume 39, p. 23. Works number was 36629 in May 1911.

As short as the Ocala Northern was, it was twice as long as the O & SW. The latter, also owned by lumberman EP Rentz and which never measured more than 6 miles in length, was intended to reach Tampa. The 102 was a virtual duplicate of the Ocala Northern's 110 (Locobase 13715), but had a 4" longer driving wheelbase.

The line's short history that ended in abandonment in 1923 at which time locomotive rebuilder/reseller Georgia Car & Locomotive bought the 102. GC & L soon traded the relatively new Ten-wheeler for an old engine from the Andalusia, Florida & Gulf, which was the product of the 1919 reorganization of the bankrupt 25-mile-long Florida, Alabama & Gulf . The line linked Galliver, Fla with several north Florida towns and the Alabama town of Falco, named for the lumber company that owned the railroad. The AFG lasted only a short time before being abandoned in 1925.


Class 50 (Locobase 13043)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 43, p.144. See also the Georgia Rails site at http://railga.com/ocillasthn.html . Baldwin works number was 39431 in March 1913.

The Ocilla Southern was a relatively late starter, its first rails laid down in 1906. As it expanded in pursuit of its goal to connect Atlanta, Ga with Nashville, Tenn, it acquired trackage rights between Ocilla and Fitzgerald and built its way north to Pope City and south to Alapaha. Alas for visions, reality insisted that the OC amass only about 1/3 of the needed distance and it entered receivership in 1918. It was fully abandoned by 1923.

The Ten-wheeler in this entry was essentially identical to several other 4-6-0s sold to small Southern railroads during this period. It had smaller drivers and set its boiler pressure to a lower level, but otherwise the boilers were essentially interchangeable.

When the OC collapsed, the 50 was sold to the Live Oak, Perry & Gulf as their 101 and served that line until it was scrapped many years later in May 1955.

Specifications by Steve Llanso of Sweat House Media
Class10250
Locobase ID13,808 13,043
RailroadOcala & SouthwesternOcilla Southern
CountryUSAUSA
Whyte4-6-04-6-0
Number in Class11
Road Numbers10250
GaugeStdStd
Number Built11
BuilderBaldwinBaldwin
Year19111913
Valve GearStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)13.1711.33
Engine Wheelbase (ft)22.9822.17
Ratio of driving wheelbase to overall engine wheebase 0.57 0.51
Overall Wheelbase (engine & tender) (ft)4651.08
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)72,00098,000
Engine Weight (lbs)99,700126,000
Tender Loaded Weight (lbs)70,00090,000
Total Engine and Tender Weight (lbs)169,700216,000
Tender Water Capacity (gals)35004500
Tender Fuel Capacity (oil/coal) (gals/tons)6
Minimum weight of rail (calculated) (lb/yd)4054
Geometry Relating to Tractive Effort
Driver Diameter (in)5656
Boiler Pressure (psi)180185
High Pressure Cylinders (dia x stroke) (in)16" x 24"18" x 26"
Tractive Effort (lbs)16,78623,655
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.29 4.14
Heating Ability
Firebox Area (sq ft)90152
Grate Area (sq ft)15.5022.40
Evaporative Heating Surface (sq ft)12221717
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)12221717
Evaporative Heating Surface/Cylinder Volume218.80224.22
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation27904144
Same as above plus superheater percentage27904144
Same as above but substitute firebox area for grate area16,20028,120
Power L150295585
Power MT461.96376.92