I am NEW to Model Railroading, and even newer to a discussion board. If this is a dumb question, I apologize. Can someone tell me what the length, or scale length, of the Bachmann 18904 HO Flat Car is. I have searched everywhere on the internet and cannot find this information. My layout consists mainly of 18" curves, but I do have three 15" curved sections connected together. I am trying to find out if this Flat Car will operate on this layout, without binding. The time period for my layout will be from the late 1800's to the, very early 1900's. The steam locomotive will normally be pulling the tender, a combine, one, or two, passenger coaches, the flat car, (if possible), and a caboose. The maximum incline is 4%, if that matters. Thank You.