The American Locomotive Company built the first "Mikado" type locomotives used on the C&IM and it delivered two 2-8-2s, which were designated as Class E-1 and given road numbers 521 and 522. This pair had 52" diameter drivers, 22" x 28" cylinders, a 195 psi boiler pressure, exerted a tractive effort of 43,197 pounds and each weighed 223,800 pounds. The firebox was 213 square feet which included 26 square feet of arch tubes, the evaporative heating surface was 2,975 square feet and with the superheater the combined heating surface was 3,613 square feet. The piston valve was 12" in diameter.
Two more came from ALCO in 1918 and were designated as Class E-2 and assigned road numbers 523 and 524. These locomotives were very similar to the Class E-1s, but they had 51" diameter drivers and the boiler pressure was 190 psi with a resultant 42,915 pounds of tractive effort and they weighed 13,200 pound more.
More motive power was needed in 1928 and this time Lima was given an order for two 2-8-2s and it delivered them in September of the same year and another was bought from Lima in 1931. They were designated as Class F-4 and assigned numbers 550-552. These three locomotives had 63" diameter drivers, 26" x 30" cylinders, a 195 psi boiler pressure, they exerted 53,336 pounds of tractive effort and each weighed 313,800 pounds. The firebox was 338 square feet which included 90 square feet of arch tubes and thermic syphons, the evaporative heating surface was 3,502 square feet and with the superheater the combined heating surface was 4,442 square feet.
By 1934, traffic had increased and C&IM purchased two used 2-8-2s with 51" diameter drivers from the Sewell Valley Railroad. Because of the 51" drivers they were designated as Class E-3. They were given road numbers 525 and 526. Another used 2-8-2 with 51" drivers was bought from the Minarets & Western and assigned road number 527 and was designated as Class E-4.
The last "Mikados' the C&IM bought were two used ALCO-built locomotives it bought from the DL&W in 1945. This pair had 63" drivers and were designated as Class F-5 and assigned road numbers 560 and 561.
There is one surviving C&IM 2-8-2 "Mikado" type locomotive. It is number 551, retired in 1955, and is on display at the Museum of Transportation in St. Louis, MO.
|Class||Qty.||Road Numbers||From Other RR||Year Acquired||Year Built||Builder||Notes|
|E-4||1||527||Minaret & Western||1938||1923||ALCO||6|
These Mikes appear to be a slight enlargement of the C-1 Consolidation (Locobase 7652) that the C & IM picked up at a yard sale in 1910. Like the C-1, the Mikes used 12" piston valves and the firebox heating surface included 26 sq ft of arch tubes. Adhesion weight came within 1,000 lb of the earlier engine, the boiler had almost the same number of tubes and flues and grate area as well as the wheelbase were identical. The big difference came in the length of the tubes & flues, which gave them a higher heating surface to cylinder volume ratio.
521-522 used Walschaert radial valve gear; the 523-522 that arrived in 1918 were identical except for their use of the Southern valve gear. They also weighed about 2 tons more.
Locobase 7653 shows the original Mikados bought by the C & IM in the teens. The pair in the current entry came after World War I. The boiler was substantially larger -- one of the largest in comparison to the cylinders it supplied among all Mikes. The design took off 10 psi of working boiler pressure and an inch of driver diameter to maintain approximately the same tractive effort. Firebox heating surface includes more supplementary appliances (arch tubes and thermic syphons) that contributed 72 sq ft (6.7 sq m).
Firebox heating surface included 90 sq ft (8.35 sq m) of arch tubes and thermic syphons.
Very similar to Akron, Canton, and Youngstown R-1 2-8-2 of 1926 (Locobase 1); both were based on the USRA light Mikado design of 1918. The design abandoned the drag-freight driver diameters of the earlier C & IM 2-8-2s (Locobase 7653 & 7654) in favor of the racier 64". 550 trailed a slightly larger tender that held 18 tons (16.3 tonnes) of coal and weighed 192,300 lb (87,226 kg) loaded.
The first two arrived in 1928, 552 in 1931. All three were retired in 1955.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Chicago & Illinois Midland||Chicago & Illinois Midland||Chicago & Illinois Midland|
|Number in Class||4||2||3|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.43||0.44||0.45|
|Overall Wheelbase (engine & tender)||66.92'||66.25'||71.71'|
|Axle Loading (Maximum Weight per Axle)|
|Weight on Drivers||171540 lbs||185800 lbs||226000 lbs|
|Engine Weight||223840 lbs||247500 lbs||305000 lbs|
|Tender Light Weight||145620 lbs||172000 lbs||187100 lbs|
|Total Engine and Tender Weight||369460 lbs||419500 lbs||492100 lbs|
|Tender Water Capacity||8200 gals||10000 gals||10000 gals|
|Tender Fuel Capacity (oil/coal)||12 tons||10 tons||18 tons|
|Minimum weight of rail (calculated)||71 lb/yard||77 lb/yard||94 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||200 psi||190 psi||200 psi|
|Cylinders (dia x stroke)||22" x 28"||22" x 28"||26" x 30"|
|Tractive Effort||44305 lbs||42915 lbs||54724 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.87||4.33||4.13|
|Firebox Area||213 sq. ft||285 sq. ft||338.30 sq. ft|
|Grate Area||54.50 sq. ft||63 sq. ft||66.70 sq. ft|
|Evaporative Heating Surface||2975 sq. ft||3649 sq. ft||3502 sq. ft|
|Superheating Surface||638 sq. ft||765 sq. ft||940 sq. ft|
|Combined Heating Surface||3613 sq. ft||4414 sq. ft||4442 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||241.49||296.21||189.96|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||10900||11970||13340|
|Same as above plus superheater percentage||12862||14005||16141|
|Same as above but substitute firebox area for grate area||50268||63356||81869|