In 1915, the Lima Locomotive Works delivered five more "Mikados" that were heavier by 4,400 pounds than the 1912 Baldwin locomotives, but otherwise were very similar. These Lima- built locomotives were numbered 1816-1820.
In 1921, the Illinois Central sold ten of its 2-8-2s to the Central of Georgia, which were built by Lima in 1916 and were almost identical to the 1816-1820 series. The C of G numbered these locomotives 1821-1837. In 1923, twenty more C of G basic design "Mikados" were ordered from Lima and were delivered in 1923 and 1924. These locomotives were numbered 1838-1857 and were similar to the rest of the 1800 series except the weight of the locomotive was 300,500 pounds. A final order for 2-8-2s went to Baldwin and in 1925 the last ten new "Mikados" arrived and were numbered 1858-1867. They resembled the Lima built 1800s except they were about 2,500 pounds lighter.
There were ten other "Mikados" on the C of G and these were converted from "Consolidations" beginning in 1919. The company shop in Macon, Georgia did the work and completed two conversions by 1921. The "Consolidations" used were C of G Class C-4s numbered in the 570 series. In 1923 eight Consolidations were shipped off to ALCO's Richmond Works and they were reworked into 2-8-2s similar to the shop built locomotives built in Macon. The resulting 2-8-2s were assigned road numbers 1751-1760 and in 1925 they were renumbered back to the 570 series.
Many of the Central of Georgia "Mikados" underwent a firebox and boiler rebuild. The firebox heating surface was increased to 314 square feet by removing two of the arch tubes and installing 64 square feet of thermic syphons. The superheater was reduced to 886 square feet with the number of flues and their lengths were not changed.
During World War II with Japan being our enemy a number of American railroads including the Central of Georgia renamed the "Mikado" type to the Mac Arthur type. The Central's name was changed in 1971 to Central of Georgia Railroad.
There are no surviving Central of Georgia 2-8-2 "Mikados".
|Class||Qty.||Road Numbers||Later Numbers||From Other RR||Year Acquired||Year Built||Builder||Notes|
|MK||2||1771-1772||571-572||1921||C of GA||4|
This is an interesting and relatively rare example of upgrading a locomotive class by changing the wheel arrangement. The Central of Georgia bought 10 Consolidations from its parent Illinois Central in 1912. Their 63" drivers suggested fast freight so the railroad converted one engine in 1919, a second in 1921 and contracted with Alco's Richmond Works for conversions of the other 8 in 1923.
These were "Harriman Mikes", Mikados built to an EH Harriman design. The firebox heating surface was modestly augmented by 27 sq ft (2.5 sq m) of arch tubes. 15" (381 mm) piston valves supplied the cylinders.
They entered service in batches as follows:
601-615 Baldwin 1912 (works numbers were 38782-38791 and 38860-38864 in November-December 1912.
616-637 Lima 1915-1916 (works numbers 5056-5059, 5209-5216, 5170, 5172, 5174, 5176, 5198, 5201-5206
638-657 Lima 1923 (works numbers 6490-6499, 6625-6634)
658-667 Baldwin 1925 (works numbers 58118-58120, 58165-58166 in December 1924 and 58172-58176 in January 1925.
Many of these locomotives underwent a boiler and firebox rebuild in which the firebox heating surface grew to 314 sq ft through the deletion of a couple of arch tubes and the addition of 64 sq ft of thermic syphons. In fact the last ten from Baldwin were delivered in 1925 with 72 sq ft (6.7 sq m) of Nicholson thermic syphons and 15 sq ft (1.4 sq m) of arch tubes.
At the same time, the superheater area somehow shrank by over 200 sq ft to 886 sq ft even though the flue count and length remained the same.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Central of Georgia (CofGa)||Central of Georgia (CofGa)|
|Number in Class||10||67|
|Road Numbers||1771-1780||1801-1867 / 601-667|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||17 / 5.18||16.50 / 5.03|
|Engine Wheelbase (ft / m)||34.50 / 10.52||35.17 / 10.72|
|Ratio of driving wheelbase to overall engine wheebase||0.49||0.47|
|Overall Wheelbase (engine & tender) (ft / m)||63.77 / 19.44||65.62 / 20|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)||50,000 / 22,680|
|Weight on Drivers (lbs / kg)||198,100 / 89,857||217,000 / 98,430|
|Engine Weight (lbs / kg)||255,000 / 115,666||280,000 / 127,006|
|Tender Loaded Weight (lbs / kg)||141,810 / 64,324||167,245 / 75,861|
|Total Engine and Tender Weight (lbs / kg)||396,810 / 179,990||447,245 / 202,867|
|Tender Water Capacity (gals / ML)||7000 / 26.52||9000 / 34.09|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||15 / 13.60||15 / 13.60|
|Minimum weight of rail (calculated) (lb/yd)||83||90|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||63 / 1600||63 / 1600|
|Boiler Pressure (psi / kPa)||200 / 13.80||188.50 / 13|
|High Pressure Cylinders (dia x stroke) (in / mm)||24" x 30" / 610x762||27" x 30" / 686x762|
|Tractive Effort (lbs / kg)||46,629 / 21150.58||55,621 / 25229.29|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.25||3.90|
|Firebox Area (sq ft / m2)||192 / 17.84||267.23 / 24.83|
|Grate Area (sq ft / m2)||50 / 4.65||70 / 6.51|
|Evaporative Heating Surface (sq ft / m2)||3340 / 310.41||4100 / 381.04|
|Superheating Surface (sq ft / m2)||905 / 84.11||1093 / 101.58|
|Combined Heating Surface (sq ft / m2)||4245 / 394.52||5193 / 482.62|
|Evaporative Heating Surface/Cylinder Volume||212.63||206.23|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||10,000||13,195|
|Same as above plus superheater percentage||12,100||15,966|
|Same as above but substitute firebox area for grate area||46,464||60,951|