How To Track Plan Database The S scale Chicago, Indianapolis & Louisville layout

The S scale Chicago, Indianapolis & Louisville layout

By Mitch Horner | October 3, 2024

| Last updated on February 18, 2026


This late 1940s Monon layout is based on the railroad’s Fourth Subdivision

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Facts and features

Name: Chicago, Indianapolis & Louisville (Monon)
Scale: S (1:64)
Size: 38 x 62 feet
Prototype: Monon
Locale: west central Indiana
Era: late 1940s
Style: walk-in
Mainline run: 180 feet
Minimum radius: 48″ (main), 36″ (sidings and spurs)
Minimum turnout: No. 6
Maximum grade: 1% (main), 2.5% (to staging)
Benchwork: L girder
Height: 46″ to 49″
Roadbed: Homasote
Track: code 100 (main), codes 83 and 70 (sidings)
Scenery: foam board and Hydrocal
Backdrop: 18” tempered hardboard
Control: NCE Digital Command Control radio

A model railroad trackplan

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