Chattanooga & Lookout Mountain 2-6-4 "Adriatic" Locomotives in 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.

Principal Dimensions 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 Wheelbase (ft / m)10 / 3.05
Engine Wheelbase (ft / m)30 / 9.14
Ratio of driving wheelbase to overall engine wheebase 0.33
Overall Wheelbase (engine & tender) (ft / m)30 / 9.14
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)70,000 / 31,752
Engine Weight (lbs / kg)112,000 / 50,802
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)112,000
Tender Water Capacity (gals / ML)2000 / 7.58
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)39 / 19.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)140 / 11
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610
Tractive Effort (lbs / kg)15,232 / 6909.13
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.60
Heating Ability
Firebox Area (sq ft / m2)97 / 9.01
Grate Area (sq ft / m2)18.75 / 1.74
Evaporative Heating Surface (sq ft / m2)967 / 89.87
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)967 / 89.87
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 area13,580
Power L12912
Power MT275.14

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Wes Barris