Selector said;
The Decapod and 2-8-0 locos represent small locomotives as were their prototypes. I believe the IC had monster Consolidations, if I recall an old article, but otherwise these were early engines that were brought on line about the same time as the earliest Mikados.
The Spectrum and now standard line 2-8-0 had the "monster" IC consolidation as a prototype. Built by Alco and Baldwin in 1909 and 1911 they were rebuilt by the IC in the 30s. Six of the Baldwins were equipped with 27x30 inch Mikado cylinders, had the drivers reduced to 62 inches by the use of 1/2 inch smaller tires. Boilers were reinforced to accommodate 235 pounds of pressure, BK stokers were added and syphons or circulators placed in the firebox. This gave them a tractive force of 64,460 pounds, more powerful then most Mikados.
Six others had their cylinders bored out to 22 1/2 inches and boilers modified to accommodate 235 pounds of pressure giving them a tractive force of 48,390 pounds, BK stokers were also applied.
Other modifications included a variety of sand domes (the square IC Paducah sand dome was what most people think of but there are photographs of these locomotives in the 1950s with a round sand dome.) moving the air compressors to the front pilot and pressed steel pilots. Number 908 a 1909 Alco build ran in daily service on the Bloomington IL local until January 1958 and wasn't retired until February 1960. It originally weighed 203,500 pounds when it left the Alco factory and weighed 249,000 after the rebuild.
The Bachmann 2-8-0 is a dead on replica of these IC engines before the IC rebuilding program. `
Some of these engines were converted to Mikados by the IC starting in 1916. By 1924 33 were converted to 2-8-2s by increasing the grate area from 51-55 square feet and adding superheaters and power reverse gears. Tractive force was 46,380 pounds at 185 pounds of boiler pressure after the conversion. They were assigned to transfer and local work on the Chicago Terminal Division, New Orleans Terminal Division and the Iowa division.
So yes, the IC had some monster consolidations and that's what Bachmann modeled.