Carpenter-O'Brien Company 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 14293)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 52, pp. 330. See also the National Parks Service's Special Study at . Works numbers were 41649-41651 in July 1914.

Carpenter-O'Brien logged timber holdings in Florida, a job for which these lightly loaded, low-drivered Prairies, burning wood and sporting Radley & Hunter cabbage stacks, were well-suited.

Each of the three had a different career with the 1 being the best known. It operated in support of the company's Eastport, Fla mill. Brooks-Scanlon bought the company in December 1917. The 1 continued in B-S service throughout World War II, first in Eastport, then after 1929 at Foley. At some point the cabbage stack was replaced by a straight (aka "shotgun") stack.

In 1947, B-S sold the 1 to the Lee Tidewater Cypress Company, which operated the 1 until 1959. F Nelson Blount bought the 1 in 1962 and moved it to Bellows Falls, Vt where it joined many other engines at Steamtown. The display moved to Scranton, Pa and was designated a National Historical Site in 1988.

3 was sold by B-S to Revell Crate of Wauchula, Fla. It was donated in January 1967 to the Peace River Valley Historical Society of Zolfo Springs and went on display in that town's Pioneer Park. According to the Cracker Trail Museum and Village website (, the 3 was also known as the "Loping Gopher".

Specifications by Steve Llanso of Sweat House Media
Locobase ID14293
RailroadCarpenter-O'Brien Company
Number in Class3
Road Numbers1, 3, 5
Number Built3
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 9.17'
Engine Wheelbase24.67'
Ratio of driving wheelbase to overall engine wheebase 0.37
Overall Wheelbase (engine & tender)46.92'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers82900 lbs
Engine Weight109000 lbs
Tender Light Weight70000 lbs
Total Engine and Tender Weight179000 lbs
Tender Water Capacity3500 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)46 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter44"
Boiler Pressure180 psi
Cylinders (dia x stroke)16" x 24"
Tractive Effort21364 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.88
Heating Ability
Firebox Area112 sq. ft
Grate Area16 sq. ft
Evaporative Heating Surface1594 sq. ft
Superheating Surface
Combined Heating Surface1594 sq. ft
Evaporative Heating Surface/Cylinder Volume285.40
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2880
Same as above plus superheater percentage2880
Same as above but substitute firebox area for grate area20160
Power L15091
Power MT406.17

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