Laurel & Tullahoma Western 4-6-0 "Ten-Wheeler" Locomotives in 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.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID13,474
RailroadLaurel & Tullahoma Western
Number in Class1
Road Numbers63
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)14 / 4.27
Engine Wheelbase (ft / m)24 / 7.32
Ratio of driving wheelbase to overall engine wheebase 0.58
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)120,000 / 54,431
Engine Weight (lbs / kg)153,000 / 69,400
Tender Loaded Weight (lbs / kg)110,000 / 49,895
Total Engine and Tender Weight (lbs / kg)263,000 / 119,295
Tender Water Capacity (gals / ML)5500 / 20.83
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)67 / 33.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)20" x 26" / 508x660
Tractive Effort (lbs / kg)31,571 / 14320.38
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.80
Heating Ability
Firebox Area (sq ft / m2)165 / 15.33
Grate Area (sq ft / m2)33.30 / 3.09
Evaporative Heating Surface (sq ft / m2)2302 / 213.86
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2302 / 213.86
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 area33,000
Power L16174
Power MT340.28

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Wes Barris