Fibonary

This CAD model was designed by Oskar van Deventer, copyright (c), 23 August 2024.

Fibonary was inspired by a question from Bram Cohen. Bram asked: "Can we make an exponential puzzle that has a non-integer base". An exponential puzzle is a puzzle where the number of moves to solve grows with a base factor for each piece added. For a binary puzzle, base=2, for a ternary one, base=3. The question immediately reminded of the Fibonacci series (1,1,2,3,5,8,13,...) and the golden ratio (phi=1.618...). Fibonary uses a gear-based adding mechanism. The number of moves for a rotor is the sum of the moves of the two lower neighbour rotors. This results in the Fibonacci series for the number of moves for a rotor, and base=phi.

The puzzle uses 16 cylindrical magnets withe 3-mm diameter and 2-mm thickness: https://www.supermagnete.de/eng/disc-magnets-neodymium/disc-magnet-3mm-2mm_S-03-02-N

Here are some links about this design.
https://www.youtube.com/watch?v=GhXS7ystmt4
https://i.materialise.com/en/shop/item/fibonary
https://i.materialise.com/forum/t/fibonary-by-oskar/3823
https://twistypuzzles.com/forum/viewtopic.php?t=39927

Feel free to 3D-print an extra sample to give to a friend, as long as you mention the designer and don't charge money.

If you are planning to sell some samples, then please contact me for a license agreement. The royalty fee is 10% of your selling price.

Please do not upload the design to a commercial service, or redistribute the design in any way other than linking to the YouTube video: https://www.youtube.com/watch?v=GhXS7ystmt4

Enjoy!

Oskar
18 January 2025

Contact: 
https://oskarvandeventer.nl/index_contact.php?subject=Print%20It%20Yourself


