|Project by Derek Hugger||posted 08-03-2013 04:53 AM||5913 views||14 times favorited||16 comments|
Inspired by David C. Roy, this designed-from-scratch kinetic sculpture is called, Annulation. When it’s wound up, Annulation will run for 5 – 7 minutes. Each ring is 14” in diameter, and the maximum rotating diameter of the sculpture is about 30”. Its rings create an organic illusion of growth and decline as they spin and sway.
Controlled Center of Gravity:
Each ring assembly’s center of gravity (CG) was carefully positioned to be exactly at the assembly’s pivot point. This not only allows the three ring assemblies to have common parts, but also allows small weights to be attached in one of three positions behind each outer ring, assigning that ring’s orientation in the sculpture.
The Ratcheting Escapement allows Annulation’s rings to spin freely in one direction but not the other. When the rings begin to turn clockwise, the Ratcheting Escapement allows energy to be released, reversing the rings’ directions, sending them spinning counterclockwise.
The combination of carefully manged CGs and ring orientations generates a dynamic visual effect of size and orientation change, when in fact, the rings’ orientations relative to each other are not changing at all.
Detailed woodworking plans as well as a video of Annulation in action are available on my website: www.derekhugger.com
Click here for a sample of the woodworking plans.
I would love to hear your comments. Please let me know what you think!