Facts & features
Scale: HO (1:87.1)
Size: 40 x 100 feet
Prototype: Baltimore & Ohio and freelanced
Locale: Pittsburgh, Pa., to Cumberland, Md.
Era: 1953
Style: walkaround
Mainline run: Mon Valley, 443 feet; B&O, 357 feet
Minimum radius: 36″ (main)
Minimum turnout: No. 8 (main), No. 6 (branch lines and yards), No. 4 (industrial)
Maximum grade: 2%
Benchwork: L-girder
Height: Mon Valley, 50″ to 76″; B&O, 52″ to 66″
Roadbed: Homasote
Track: code 83 (main and branch lines), code 70 (yards and industries), code 100 (hidden staging)
Scenery: screen and foam with plaster coating
Backdrop: painted or tree-covered tempered hardboard
Control: Digitrax LocoNet Digital Command Control