Constant radius corners and sloping ground?

Discussion in 'Bob's Track Builder' started by R Soul, Nov 24, 2014.

  1. R Soul

    R Soul

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    Does anyone know how real track builders create constant radius corners when the ground is not flat? Usually a track is designed in top view (not just BTB, but CAD and other methods too). However if you take a circle and project it down onto a slope (imagine a perfect shadow), the resulting line will no longer be a perfect curve from the driver's point of view.

    In top view this corner is perfectly circular:
    [​IMG]

    But when projected onto a steep slope like this (imagine just moving a node downwards):
    [​IMG]

    I think the driver's experience would be that the corner's radius changes:
    [​IMG]

    So, should a track's top view be changed to take this effect into account?
     
  2. Emery

    Emery

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    Laguna Seca (er, Mazda Raceway Laguna Seca) and Mosport (er, Canadian Tire Motorsport Park) both have published plans and they show the constant radius turns from a top view despite elevation changes.
     
  3. R Soul

    R Soul

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    Thanks for your reply. I'm probably over-thinking things. I think I'll just plan constant radius corners and adjust the exits if the seem to get tighter.