Chattanooga & Lookout Mountain 2-6-4 "Adriatic" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class Mississippi (Locobase 9549)

Data from Matthias Forney, Catechism of the Locomotive, Fig 107. See also "Brooks' Double Ended Locomotive," National Car & Locomotive Builder," Vol XX, No 1 (January 1889), p. 2. Works number was 1431 in September 1888.

This unusual tank was apparently the only locomotive to actually reach the metals of the C & LM before it folded. The other two--both 4-4-2Ts--supplied by Brooks were repossessed.

Specifications by Steve Llanso of Sweat House Media
Locobase ID9549
RailroadChattanooga & Lookout Mountain
Number in Class1
Road Numbers1
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase10'
Engine Wheelbase30'
Ratio of driving wheelbase to overall engine wheebase 0.33
Overall Wheelbase (engine & tender)30'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers70000 lbs
Engine Weight112000 lbs
Tender Light Weight
Total Engine and Tender Weight112000 lbs
Tender Water Capacity2000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)39 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter48"
Boiler Pressure140 psi
Cylinders (dia x stroke)16" x 24"
Tractive Effort15232 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.60
Heating Ability
Firebox Area97 sq. ft
Grate Area18.75 sq. ft
Evaporative Heating Surface967 sq. ft
Superheating Surface
Combined Heating Surface967 sq. ft
Evaporative Heating Surface/Cylinder Volume173.14
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2625
Same as above plus superheater percentage2625
Same as above but substitute firebox area for grate area13580
Power L12912
Power MT275.14

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