The new locomotives were built by the Baldwin Locomotive Works and were delivered in 1926. These locomotives were designated as Class J-1 and assigned road numbers 701 through 710. They had 63" diameter drivers, 30" x 32" cylinders, a 190 psi boiler pressure, they exerted 73,825 pounds of tractive effort and each weighed 401,480 pounds.
C of G added two Nicholson thermic syphons of 88 square feet and three arch tubes of 27 square feet to the basic USRA "Santa Fe-Heavy" design which resulted in a huge firebox heating surface. The Cole-formula cylinder horsepower rating was 3,082 HP. A 15" piston valves supplied to steam to the large cylinders and there was 6,518 square feet of combined heating surface.
In 1926, the C of G traded ten "Mallets" to the Illinois Central for seven "Santa Fe" locomotives which were put on the roster as road numbers 771 through 777. In 1942, two more second-hand 2-10-2s were added as road numbers 711 and 712. The last two were bought from the Chicago & East Illinois.
There are no surviving C of G 2-10-2 "Santa Fe" type locomotives.
| Class | Qty. | Road Numbers | From Other RR | Year Acquired | Year Built | Builder | Notes |
|---|---|---|---|---|---|---|---|
| J-1 | 10 | 701-710 | 1926 | Baldwin | Number 710 scrapped in 1950. Numbers 701-709 scrapped during 1952 and 1953. | ||
| J-2 | 2 | 711-712 | C&EI | 1942 | 1918 | Baldwin | Bought from the C&EI in 1942. Numbers 711-712 scrapped in 1950. |
| J-3 | 3 | 771-773 | IC | 1926 | 1916 | ALCO | Acquired from the Illinois Central in 1926. Part of trade for .Mallets. number 790-799. Ex Illinois Central numbers 2601-2603. Numbers 771-773 scrapped between 1947 and 1953. |
| J-3 | 4 | 774-777 | IC | 1926 | 1918 | ALCO | Acquired from the Illinois Central in 1926. Part of trade for .Mallets. number 790-799. Ex Illinois Central numbers 2604-2607. Numbers 774-777 scrapped in 1952-1953. |
Data from "Central of Georgia 2-10-2 Locomotives", Railway Age, Volume 80, No 14 (20 March 1926), pp. 869-870; and DeGolyer, Volume 75, pp. 367+. Works numbers were 58792-58794 in October 1925, 58845-58849 in November, 58899-58900 in December.
Central of Georgia added two Nicholson thermic syphons of 88 sq ft (8.18 sq m) and three arch tubes of 27 sq ft (2.51 sq m) to the basic USRA heavy Santa Fe design (Locobase 90); this resulted in a huge firebox heating surface when combined with the 121 sq ft (11.24 sq m) of the long combustion chamber. Three of the class--702-703 and 706--used HT stokers; the others fed their fireboxes with Duplex stokers. RA calculated a Cole-formula cylinder horsepower rating of 3,082. 15" (381 mm) piston valves supplied to steam to the large cylinders. (Later Cof Ga diagrams show slight differences in heating area.)
Drury (1993) comments that these engines "were much better suited to CofG's Birmingham route than the Mallets [2-6-6-2] and could be used on other lines as well." All but the middle driver on each side had flanges. A 8 October 1937 "Hereafter and Extras" note reveals that the class received Baldwin disc drivers as it says they are to be furnished without hub liners.
Except for 710, which was retired in May 1950, The J-1s all left service in 1952-1953.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | J-1 |
| Locobase ID | 462 |
| Railroad | Central of Georgia (CofGa) |
| Country | USA |
| Whyte | 2-10-2 |
| Number in Class | 10 |
| Road Numbers | 701-710 |
| Gauge | Std |
| Number Built | 10 |
| Builder | Baldwin |
| Year | 1925 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 22.30 / 6.80 |
| Engine Wheelbase (ft / m) | 42.50 / 12.95 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.52 |
| Overall Wheelbase (engine & tender) (ft / m) | 82.42 / 25.12 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 62,390 / 28,300 |
| Weight on Drivers (lbs / kg) | 309,220 / 140,260 |
| Engine Weight (lbs / kg) | 401,480 / 182,108 |
| Tender Loaded Weight (lbs / kg) | 208,600 / 94,619 |
| Total Engine and Tender Weight (lbs / kg) | 610,080 / 276,727 |
| Tender Water Capacity (gals / ML) | 12,000 / 45.45 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 16 / 15 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 103 / 51.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 63 / 1600 |
| Boiler Pressure (psi / kPa) | 190 / 1310 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 30" x 32" / 762x813 |
| Tractive Effort (lbs / kg) | 73,829 / 33488.31 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.19 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 271 - 2.25" / 57 |
| Flues (number - dia) (in / mm) | 50 - 5.5" / 140 |
| Flue/Tube length (ft / m) | 20.50 / 6.25 |
| Firebox Area (sq ft / m2) | 504 / 46.82 |
| Grate Area (sq ft / m2) | 88.30 / 8.20 |
| Evaporative Heating Surface (sq ft / m2) | 5233 / 486.16 |
| Superheating Surface (sq ft / m2) | 1285 / 119.38 |
| Combined Heating Surface (sq ft / m2) | 6518 / 605.54 |
| Evaporative Heating Surface/Cylinder Volume | 199.89 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 16,777 |
| Same as above plus superheater percentage | 20,132 |
| Same as above but substitute firebox area for grate area | 114,912 |
| Power L1 | 14,721 |
| Power MT | 524.78 |
