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-1||2||521-522||1914||ALCO||Numbers 521-522 sold to the Newaukum Valley in 1940 and became NV numbers 512-522 and then SP numbers 3297-3298. Both scrapped in 1953.|
|E-2||2||523-524||1918||ALCO||Number 523 sold to Apache and became number 500 in 1945 then to FCN NOdeM and became number 103 and then CH-P number 103. Number 523 scrapped in 1957. Number 524 scrapped in 1944.|
|F-4||2||550-551||1928||Lima||Number 550 scrapped in 1955. Number 551 donated to the National Museum of Transportation in 1955.|
|F-4||1||552||1931||Lima||Number 552 scrapped in 1955.|
|E-3||2||525-526||Sewell Valley||1934||1922-1923||Lima||Number 525 was ex Sewell Valley number 9 which was C&O #2920 and number 526 was ex Sewell Valley number12, which was C&O number 2921 acquired in 1934 and both scrapped in 1948.|
|E-4||1||527||Minaret & Western||1938||1923||ALCO||Ex Minarets & Western number 103, which was A&St.AB number 300 acquired in 1938 and was scrapped in 1951.|
|F-5||2||560-561||DL&W||1945||1922-1923||ALCO||Numbers 560-561 were ex DL&W number 2120 and number 2137 acquired in 1945. Both scrapped in 1951.|
Data from C&IM 4 -1954 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.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.
Data from C&IM 4 -1954 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.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).
Data from 1930 Locomotive Cyclopedia and from C&IM 4 - 1954 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. (Thanks to Chris Hohl for his 30 January email noting the variations in this class's tenders. Hohl also pointed out that the class was originally delivered with 63" drivers. A 22 September 2017 email reported unlikely boiler pressure values for 177 entries. A Locobase macro caused the error .) Works numbers were 7329-7330 in September 1928 and 7586 in April 1931.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. Later inthe class's career, the C&IM mounted 64" drivers on all three engines. As Chris Hohl noted in his comments, the three engines had three different tenders by 1954. The tender shown in the spces above is a larger tender that carried more coal that was mated with the 550. The 551's tender weighed 187,100 lb (79,878 kg) loaded and carried 16 tons (14.51 tonnes) of coal. The 552 was delivered with a tender with the same amount of coal as the 551, but 12,000 US gallons (45,420 litres) of water; it weighed 209,300 lb (94,937 kg) fully loaded. The first two arrived in 1928, 552 in 1931. All three were retired in 1955.
|Principal Dimensions 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|
|Driver Wheelbase (ft / m)||14.25 / 4.34||14 / 4.27||16.75 / 5.11|
|Engine Wheelbase (ft / m)||32.83 / 10.01||31.50 / 9.60||36.92 / 11.25|
|Ratio of driving wheelbase to overall engine wheebase||0.43||0.44||0.45|
|Overall Wheelbase (engine & tender) (ft / m)||66.92 / 20.40||66.25 / 20.19||71.71 / 21.86|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||171,540 / 77,809||185,800 / 84,278||226,000 / 102,512|
|Engine Weight (lbs / kg)||223,840 / 101,532||247,500 / 112,264||305,000 / 138,346|
|Tender Loaded Weight (lbs / kg)||145,620 / 66,052||172,000 / 78,018||192,300 / 87,226|
|Total Engine and Tender Weight (lbs / kg)||369,460 / 167,584||419,500 / 190,282||497,300 / 225,572|
|Tender Water Capacity (gals / ML)||8200 / 31.06||10,000 / 37.88||10,000 / 37.88|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||12 / 10.90||10 / 9.10||18 / 16.40|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||71 / 35.50||77 / 38.50||94 / 47|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||52 / 1321||51 / 1295||63 / 1600|
|Boiler Pressure (psi / kPa)||200 / 13.80||190 / 13.10||200 / 13.80|
|High Pressure Cylinders (dia x stroke) (in / mm)||22" x 28" / 559x711||22" x 28" / 559x711||26" x 30" / 660x762|
|Tractive Effort (lbs / kg)||44,305 / 20096.43||42,915 / 19465.94||54,724 / 24822.42|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.87||4.33||4.13|
|Firebox Area (sq ft / m2)||213 / 19.80||285 / 26.49||338.30 / 31.43|
|Grate Area (sq ft / m2)||54.50 / 5.07||63 / 5.86||66.70 / 6.20|
|Evaporative Heating Surface (sq ft / m2)||2975 / 276.49||3649 / 339.13||3502 / 325.46|
|Superheating Surface (sq ft / m2)||638 / 59.29||765 / 71.10||940 / 87.36|
|Combined Heating Surface (sq ft / m2)||3613 / 335.78||4414 / 410.23||4442 / 412.82|
|Evaporative Heating Surface/Cylinder Volume||241.49||296.21||189.96|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||10,900||11,970||13,340|
|Same as above plus superheater percentage||12,862||14,005||16,141|
|Same as above but substitute firebox area for grate area||50,268||63,356||81,869|