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 Wheelbase14'
Engine Wheelbase37.35'
Ratio of driving wheelbase to overall engine wheebase 0.37
Overall Wheelbase (engine & tender)37.35'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers121450 lbs
Engine Weight211070 lbs
Tender Light Weight
Total Engine and Tender Weight211070 lbs
Tender Water Capacity3105 gals
Tender Fuel Capacity (oil/coal)6.3 tons
Minimum weight of rail (calculated)67 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter56.50"
Boiler Pressure165 psi
Cylinders (dia x stroke)19" x 26"
Tractive Effort23299 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.21
Heating Ability
Firebox Area188.90 sq. ft
Grate Area26.40 sq. ft
Evaporative Heating Surface1548 sq. ft
Superheating Surface
Combined Heating Surface1548 sq. ft
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 area31169
Power L14539
Power MT247.18


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