Central of Georgia 2-6-4 "Adriatic" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class SB (Locobase 7904)

Data from the CofGA 11 - 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 4908 and 4723.

Firebox heating surface that included 25.15 sq ft of arch tubes.

Locobase knows only that these suburban locomotives were still on the books in the 1920s.

Specifications by Steve Llanso of Sweat House Media
Locobase ID7904
RailroadCentral of Georgia (CofGa)
Number in Class2
Road Numbers300-301
Number Built2
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)14
Engine Wheelbase (ft)37.35
Ratio of driving wheelbase to overall engine wheebase 0.37
Overall Wheelbase (engine & tender) (ft)37.35
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)121,450
Engine Weight (lbs)211,070
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)211,070
Tender Water Capacity (gals)3105
Tender Fuel Capacity (oil/coal) (gals/tons) 6.30
Minimum weight of rail (calculated) (lb/yd)67
Geometry Relating to Tractive Effort
Driver Diameter (in)56.50
Boiler Pressure (psi)165
High Pressure Cylinders (dia x stroke) (in)19" x 26"
Tractive Effort (lbs)23,299
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.21
Heating Ability
Firebox Area (sq ft)188.90
Grate Area (sq ft)26.40
Evaporative Heating Surface (sq ft)1548
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1548
Evaporative Heating Surface/Cylinder Volume181.43
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4356
Same as above plus superheater percentage4356
Same as above but substitute firebox area for grate area31,169
Power L14539
Power MT247.18


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