Middle Georgia & Atlantic / Central of Georgia 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 8/T (Locobase 7902)

Data from the CofGA 1905 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 20, p. 183; and the Georgia Railroad History website's "Middle Georgia & Atlantic Railway" at https://railga.com/midga.html, last accessed 21 November 2017. Works number was 14993 in August 1896.

This engine differs from the 1356 class shown in Locobase 7901 in having the firebox ride above the rear two axles rather than between them. Nevertheless, it still had the narrow grate used in most locomotives up to that time.

Begun as the Eatonton & Machen, the MG&A took on its own identity in 1889. It connected the former state capital at Milledgeville with Covington to the northwest. At its longest, the railroad measured 65 miles (105 km)

The MG&A was taken into the C of G in 1897 and the 8 went with the rest. Renumbered 3 times, 231 (ex-1321, ex-1365) was finally retired in May 1939.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID7902
RailroadMiddle Georgia & Atlantic / Central of Georgia
Number in Class1
Road Numbers8/1365/ 1321/231
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.33 / 3.45
Engine Wheelbase (ft / m)21.58 / 6.58
Ratio of driving wheelbase to overall engine wheebase 0.53
Overall Wheelbase (engine & tender) (ft / m)47.92 / 14.61
Axle Loading (Maximum Weight per Axle) (lbs / kg)34,750 / 15,762
Weight on Drivers (lbs / kg)99,000 / 44,906
Engine Weight (lbs / kg)110,650 / 50,190
Tender Loaded Weight (lbs / kg)81,500 / 36,968
Total Engine and Tender Weight (lbs / kg)192,150 / 87,158
Tender Water Capacity (gals / ML)3500
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)8 / 7.30
Minimum weight of rail (calculated) (lb/yd / kg/m)55 / 27.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)57 / 1448
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x610
Tractive Effort (lbs / kg)20,872 / 9467.39
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.74
Heating Ability
Firebox Area (sq ft / m2)139 / 12.92
Grate Area (sq ft / m2)22 / 2.04
Evaporative Heating Surface (sq ft / m2)1637 / 152.14
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1637 / 152.14
Evaporative Heating Surface/Cylinder Volume231.59
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3960
Same as above plus superheater percentage3960
Same as above but substitute firebox area for grate area25,020
Power L15641
Power MT376.86

All material Copyright © SteamLocomotive.com
Wes Barris