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A trigonal prism with 9 axis. Curved cuts make it work.
HeliPrism 9 Curvy is a curve cut variant of HeliPrism 9 Ball. However, the curved cuts eliminate some parts, and expose the axles on the 90 degree edges. The curved cuts on the 60 degree edges also move a different set of parts than moves on the 60 degree edges of HeliPrism 9 Ball.
Interestingly, the square faces of the puzzle exhibit true four-way symmetry, despite the fact that the curvature of the slices is different for the two types of edges. This curvature is determined by matching the surface slice that appears on the triangular faces for the jumbling and the vertical cuts.
Edge length: 76 mm
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Thank you to the following people for their assistance in helping collect the information on this page: David Pitcher.
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