Kentucky & Tennessee 2-6-2 "Prairie" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 8 (Locobase 13816)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 39, p. 46. Works number was 37269 in November 1911.

The K & T took account of its 3% grades that included 16-degree curves, compensated, the maximum curves of 24 degrees, and its rail weights of 60 lb/yard and specified this low-drivered Prairie. The order required the 8 to haul 204 short tons up the 3% grade.

One of its primary duties was to head the passenger train that connected Stearns with Cooperative (13 miles each way) and served the miners who got out the coal in the latter location. After more than 4 decades, the 8 was scrapped in 1951.

Specifications by Steve Llanso of Sweat House Media
Class8
Locobase ID13816
RailroadKentucky & Tennessee
CountryUSA
Whyte2-6-2
Number in Class1
Road Numbers8
GaugeStd
Number Built1
BuilderBaldwin
Year1911
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 9.50'
Engine Wheelbase24.50'
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender)48.82'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers110000 lbs
Engine Weight140000 lbs
Tender Light Weight90000 lbs
Total Engine and Tender Weight230000 lbs
Tender Water Capacity4500 gals
Tender Fuel Capacity (oil/coal)6 tons
Minimum weight of rail (calculated)61 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter51"
Boiler Pressure170 psi
Cylinders (dia x stroke)20" x 24"
Tractive Effort27200 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.04
Heating Ability
Firebox Area124 sq. ft
Grate Area34 sq. ft
Evaporative Heating Surface2135 sq. ft
Superheating Surface
Combined Heating Surface2135 sq. ft
Evaporative Heating Surface/Cylinder Volume244.65
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5780
Same as above plus superheater percentage5780
Same as above but substitute firebox area for grate area21080
Power L14562
Power MT274.29


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