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 [
], 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 Middle Run Media | |
|---|---|
| Class | 8/T |
| Locobase ID | 7902 |
| Railroad | Middle Georgia & Atlantic / Central of Georgia |
| Country | USA |
| Whyte | 4-6-0 |
| Number in Class | 1 |
| Road Numbers | 8/1365/ 1321/231 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Burnham, Williams & Co |
| Year | 1896 |
| Valve Gear | Stephenson |
| 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 wheelbase | 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 / Liters/MT) | 8 / 7 |
| 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 / 1240 |
| 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 | |
| Tubes (number - dia) (in / mm) | 229 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.50 / 3.81 |
| 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 Volume | 231.54 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3960 |
| Same as above plus superheater percentage | 3960 |
| Same as above but substitute firebox area for grate area | 25,020 |
| Power L1 | 5640 |
| Power MT | 376.79 |