Helicopter Cube
(by Adam G. Cowan)

The Helicopter Cube was designed by Adam G. Cowan in 2007, about the same time as Katsuhiko Okamoto independently designed a similar puzzle called the Bevel Cube. Here are some pictures of Tom van der Zanden's Curvy Copter next to the Helicopter Cube:

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© 09-03-2010   Klara