Nut Stack - What does "phase angle" mean for screws?
Channel: OskarPuzzle
Date: 2021-04-25

More OskarPuzzle at https://www.youtube.com/OskarPuzzle?sub_confirmation=1. Print it yourself at https://oskarvandeventer.nl/Print-It-Yourself/. Buy at https://www.puzzlemaster.ca/browse/inventors/oskar/15352-nut-stack, https://i.materialise.com/en/shop/item/nut-stack or at https://www.shapeways.com/product/68PFBX6JY/nut-stack. Nut Stack is a packing problem. The object is to fit the screw and the four nuts into the pentagonal box. The way to do this is to fit the nuts around the screw and put these together into the box. Each of the nuts is pentagonal with an elongated side. When one turns the nuts around the screw, all nuts stacked together form a pattern. Only one of all 12x16=192 possible permutations and combinations matches the pattern of the box. In order to make the puzzle more accessible, each of the nuts has two little black markers. When any two nuts are bolted together, their markers line up. This makes it easier to try and analyse the puzzle.

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