Temporary O scale layout using Atlas O track.

[balidas]

You'll need 16 sections to make a full circle.

[Locojunkie]

How many pieces and what pieces do I need to set up a temporary Atlas O scale track layout in order to run a N&W 4-8-4 J or bigger locomotive. I know I need 54 Radius or bigger curves to handle the locomotives but how many and what else would I need to run it? Thanks.