Jacksonville, Tampa & Key West 2-4-2 "Columbian" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 10 (Locobase 11837)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 12, p. 218. Works numbers were 7708, 7710 in October 1885.

The specification lists the projected weights as 40,000 lb on the drivers, 60,000 overall. Given the 5-ton and 6-ton increases in weight to those shown as "actual" on the sheet, Locobase suspects that the estimate was based on a narrower-gauge locomotive.

An 1885 US Treasury Report on the internal commerce of the United States described the J, T & K W in overheated tones on page 403 as "...another young colossus which has planted its feet with long strides and firm tread upon the remote parts of the state. It is the latest in setting out and the sturdiest in adventure."

Ambitious perhaps, but not all that sturdy. In the year after this pair of tanks was delivered, it consolidated the Palatka & Indian River and the Sanford & Lake Eustis. Moreover, the line did make it to Titusville, a key hub in the center of the state. By 1892, however, the J, T & KW was placed in receivership in July 1892. The line was taken over by Henry Plant's Savannah, Florida & Western and ultimately was absorbed by the Atlantic Coast LIne in 1902.

Both tanks were rebuilt as 0-4-0Ts and later sold to Cuban railroads.

Specifications by Steve Llanso of Sweat House Media
Class10
Locobase ID11,837
RailroadJacksonville, Tampa & Key West
CountryUSA
Whyte2-4-2T
Number in Class2
Road Numbers10-11
Gauge5'
Number Built2
BuilderBurnham, Parry, Williams & Co
Year1885
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)7
Engine Wheelbase (ft)21.58
Ratio of driving wheelbase to overall engine wheebase 0.32
Overall Wheelbase (engine & tender) (ft)21.58
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)50,000
Engine Weight (lbs)72,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)72,000
Tender Water Capacity (gals)700
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)42
Geometry Relating to Tractive Effort
Driver Diameter (in)54
Boiler Pressure (psi)130
High Pressure Cylinders (dia x stroke) (in)14" x 24"
Tractive Effort (lbs)9626
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.19
Heating Ability
Firebox Area (sq ft)62
Grate Area (sq ft)11.70
Evaporative Heating Surface (sq ft)724
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)724
Evaporative Heating Surface/Cylinder Volume169.31
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1521
Same as above plus superheater percentage1521
Same as above but substitute firebox area for grate area8060
Power L12829
Power MT249.47


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