Laurel & Tullahoma Western 4-6-0 "Ten-wheeler" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 63 (Locobase 13474)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 32, p. 251. See Locobase 12731 for short history of the Eastman Gardiner company. Works number was 32855 in July 1908.

Clearly the scale of operations on the L & TW called for bigger iron horses, so 4 years after it procured the little 2-4-0 #61 from Baldwin (Locobase 12731), the road ordered a much more substantial engine. This was a mid-sized Ten-wheeler of the type operating on Class 1 roads and it was met with a road that matched those aspirations. Maximum grade was 1 3/4% and the sharpest main-line curves came to a shallow 8 degrees of radius.

Specifications by Steve Llanso of Sweat House Media
Class63
Locobase ID13474
RailroadLaurel & Tullahoma Western
CountryUSA
Whyte4-6-0
Number in Class1
Road Numbers63
GaugeStd
Number Built1
BuilderBurnham, Williams & Co
Year1908
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase14'
Engine Wheelbase24'
Ratio of driving wheelbase to overall engine wheebase 0.58
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers120000 lbs
Engine Weight153000 lbs
Tender Light Weight110000 lbs
Total Engine and Tender Weight263000 lbs
Tender Water Capacity5500 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)67 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter56"
Boiler Pressure200 psi
Cylinders (dia x stroke)20" x 26"
Tractive Effort31571 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.80
Heating Ability
Firebox Area165 sq. ft
Grate Area33.30 sq. ft
Evaporative Heating Surface2302 sq. ft
Superheating Surface
Combined Heating Surface2302 sq. ft
Evaporative Heating Surface/Cylinder Volume243.50
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6660
Same as above plus superheater percentage6660
Same as above but substitute firebox area for grate area33000
Power L16174
Power MT340.28


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