Ein Hohlraum mit perfekt ausgeklügelter Form ist das Geheimnis dieses Kreisels.
Hovering Fish and Rotating Turtles: An optimization method for 3D-printed objects gives them remarkable geometric properties. A plastic fish is thrown into the water and hovers close to the surface. Inside it has a hollow space with exactly the right shape and size to make the fish hover and stay upright. Using standard methods, countless test runs would be necessary in order to produce such a perfectly balanced object. Now there is a rather simple way to implement such complex requirements. Scientists from TU Wien (Vienna) and RWTH Aachen have developed a method to adjust the hollow space inside a 3D-printed object in such a way that its balance or other physical properties can be tuned with great accuracy. Toys Containing Science - At first glance, the objects produced in the computer graphics lab at TU Wien look like toys but from the scientific point of view they are indeed quite interesting.
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