Click a thumbnail to see its larger version and description.
The first shape transformation of a Curvy Copter and the second tetrahedron with this axis system.
Only weeks after the Celtic tetrahedron the Helicoptrahedron follwed. Both have the shape of a pillowed tetrahedron and have the axis system of edge-turning hexahedron. The Helicoptrahedron was handmade from a CurvyCopter for which mass production started only 3 months ago.
Since the symmetry groups of hexahedron and tetrahedron are not isomorph this puzzle changes its shape even when only 180Â° moves are used. But their symmetry group are so similar, that there are only 5 differently shaped pieces compared with 3 of the original puzzle. Like the original puzzle this one allows jumbling moves.
If you're looking to buy, eBay is the one place you can find almost anything... if you're willing to wait for it, then pay the price!
Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann.
Found a mistake or something missing? Edit it yourself or contact the moderator.