Foucault’s Pumpkin – a Foucault pumpkin pendulum

Foucault’s Pumpkin – a Foucault pumpkin pendulum

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Dfred writes – “This non-functional model of a Foucault Pendulum was created as part of the 2006 pumpkin contest at the Traverse Area District Library. The connection to the pumpkin was made by tying 1.5mm accessory cord around the centers of three 2.5” long clevis pins, used as toggles. The pins were inserted through small holes in the bottom of the pumpkin. Once inside and pulled taut they pivot 90 degrees, much like the plastic “T”s that are used to attach tags to new clothing. Nylon sleeves were threaded onto the cord and pressed into the holes to prevent the cord from cutting into the flesh of the pumpkin.

The three cords were tied and then seized onto a 3/4” stainless ring to provide a convenient attachment point. “ Thanks Mike!Link.


  • A Foucault pendulum, or Foucault’s pendulum, named after the French physicist Léon Foucault, was conceived as an experiment to demonstrate the rotation of the Earth; its action is a result of the Coriolis effect. It is a tall pendulum free to oscillate in any vertical plane and ideally should include some sort of motor so that it can run continuously rather than have its motion damped by air resistance – Link.


  • MAKE Halloween projects – Link.
  • MAKE Halloween archives – Link.
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