which initiated years of rail car experimentation on a few railroad lines

The models are not available separately

This is a Bachmann 66355 N Norfolk Southern GP40 Diesel Locomotive with Sound #3057

The Trainz SKU for this item is P11997184

and sheet aluminum roofing

MTH 20-3612-1 Erie 2-8-8-8-2 Triplex Steam Engine with Proto-Sound 3.0 #5016 ProductID_11460923 which initiated years of railThis is a MTH 2036121 O Scale Erie 2 8 8 8 2 Triplex Steam Engine with Proto Sound 3. 0 (Hi Rail Wheels) #5016. Product Features: Intricately Detailed, Diecast Boiler and Chassis , Intricately Detailed, Diecast Tender Body , Authentic Paint Scheme , Real Tender Coal Load , Diecast Locomotive Trucks , Handpainted Engineer and Fireman Figures , Metal Handrails, Whiste and Bell , Metal Wheels and Axles , Remote Controlled Proto Coupler , Prototypical