The DT&I in modern time its reason for existence was to move products originating from the automobile factories in the Detroit area southward from Toledo through Lima, OH and Springfield, OH to Ironton, OH on the Ohio River. In 1929, the Ford Motor Company brought the DT&I and improvements were made. After Ford sold the line to the PRR, in 1929, things began to deteriorate. . .
The Detroit, Toledo & Ironton unlike most railroads had passed over the 2-8-2 wheel arrangement and bought fifteen "Decapods in 1918. A short time after the PRR bought the DT&I it sent it a few locomotives, which for a time satisfied its needs for motive power. In the mid 1930s, six 2-8-4 were added to the roster and they did very well but were judged to be more locomotive than was called for on the DT&I. When additional locomotives were needed in the early 1940s the 2-8-2 was deemed to be the right choice and twelve were bought from the Lima Locomotive Works.
The twelve "Mikao" type locomotives were built by the Lima Locomotive Works and delivered in groups of four each in 1940, 1941 and 1944. They were assigned road numbers 800 through 811. These locomotives had 63" diameter drivers, 23" x 30" cylinders, a 200 psi boiler pressure, they exerted 55,671 pounds of tractive effort and each weighed 369,500 pounds. The fire box was 290 square feet, the evaporative heating surface was 4,009 square feet and with the superheater the combined heating surface was 5,824 square feet.
There were two other "Mikados" that were added to the roster in 1948. These two locomotives were second-hand PRR Class L1 2-8-2s. One was PRR number 1642 and the other was number 3642.
There are no surviving DT&I 2-8-2 "Mikado" type locomotives.
|Qty.||Road Numbers||From Other RR||Year Acquired||Year Built||Builder||Notes|
Data from tables in 1947 Locomotive Cyclopedia and DT&I 7-1955 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. (Many thanks to Chris Hohl for his 22 September 2017 email reporting unlikely boiler pressure values for 177 entries. A Locobase macro caused the error .) Works numbers were 7794-7797 in November 1940, 7844-7847 in July 1941, and 8469-8472 in May 1944.Drury (1993) explains this late Mikado purchase as a response to the DT & I's realization that their Berkshires (Locobase 57) were perhaps a bit too much of a good thing. Thus, they went back to Lima for more power almost as soon as they took delivery of the last two 2-8-4s on the eve of World War II. In 1940, DT & I received four Super Mikes (works #7794-7797). A year later, 804-807 arrived and the class finished off with 808-811 in 1944. One of the few classes of 2-8-2s to have a Type E superheater, the 800s had a smaller grate than the Berks, but were otherwise almost as large and proved more than equal to the task of hauling fast freights. Their direct heating surface area included 60 sq ft (5.55 sq m) of circulators. The 12" (305 mm) piston valves had 8" (203 mm) of travel with a lap of 1 7/16" (36 mm) and lead of 7/16" (11 mm).
|Principal Dimensions by Steve Llanso of Sweat House Media|
|Railroad||Detroit, Toledo & Ironton (DT&I)|
|Number in Class||12|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||16.75 / 5.11|
|Engine Wheelbase (ft / m)||37.25 / 11.35|
|Ratio of driving wheelbase to overall engine wheebase||0.45|
|Overall Wheelbase (engine & tender) (ft / m)||75.02 / 22.87|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||248,500 / 112,718|
|Engine Weight (lbs / kg)||369,500 / 167,603|
|Tender Loaded Weight (lbs / kg)||245,700 / 111,448|
|Total Engine and Tender Weight (lbs / kg)||615,200 / 279,051|
|Tender Water Capacity (gals / ML)||14,300 / 54.17|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||18 / 16.40|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||104 / 52|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||63 / 1600|
|Boiler Pressure (psi / kPa)||260 / 17.90|
|High Pressure Cylinders (dia x stroke) (in / mm)||23" x 30" / 584x762|
|Tractive Effort (lbs / kg)||55,671 / 25251.97|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.46|
|Firebox Area (sq ft / m2)||290 / 26.94|
|Grate Area (sq ft / m2)||66.80 / 6.21|
|Evaporative Heating Surface (sq ft / m2)||4009 / 372.58|
|Superheating Surface (sq ft / m2)||1815 / 168.68|
|Combined Heating Surface (sq ft / m2)||5824 / 541.26|
|Evaporative Heating Surface/Cylinder Volume||277.90|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||17,368|
|Same as above plus superheater percentage||22,752|
|Same as above but substitute firebox area for grate area||98,774|