October 22, 2024
Description
I printed with PLA, 0.2mm height and 25% gyroid infill.
If you want more precise square you could do some precise sanding.
Holes B-D form silver ratio Θ*10mm=~24.14
A-B is Θ/2
The silver ratio is
Θ = 2.414213… = 1 + sqrt(2)
It derives from the Pell-Lucas numbers. A001333 - OEIS
1, 1, 3, 7, 17, 41, 99, 239, 577, 1393, 3363, 8119, …
Or from Pell numbers. https://oeis.org/A000129
0, 1, 2, 5, 12, 29, 70, 169, 408, 985, 2378, 5741, …
S[n]=2*S[n-1]+S[n-2]
License:
Creative Commons — Attribution
Jussi Aro
