Can anyone point me to the circle diameter of the various track curve sizes for Fastrack? I am trying to figure out if I have room for O72 or will will have to stick with O60. It's frustrating that the dimensions to the edge of the roadbed are not listed anywhere.
Thanks.
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Just add 2" to the radius, or 4" to the diameter. O-36 requires 40" including the roadbed. O-72 requires 76".
Since you didn't say how wide your decking is I'm not sure if this will help, but from what I gather the FasTrack roadbed is 3.63" wide, meaning 1.81" on either side of the center track. This should mean that an O60 oval will measure just under 64" and an O72 just under 76".
I concur with DoubleDaz, width of Fastrack roadbed is just over 3.5". But you may want some additional space between the edge of the roadbed and edge of the layout surface, so Rob's suggestion of 2" from the center rail might be a good standard for planning. -Ken
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