Dear O-listers:
I want to know who is the author of a unit which I have known for
years as a "classic".
It is a modular unit similar to Sonobe's unit, but with equilateral triangles.
The version I am asking about starts with a 1:sqrt(3) rectangle
(bronze rectangle).
The final shape and the assembly looks exactly like the final drawing
of this diagram by Martin Hunt:
https://www.flickr.com/photos/starwarigami/7280541594
but the folding sequence is much easier due to the initial 1:sqrt(3)
proportion (start joining opposite corners to get the perpendicular
bisector of the diagonal of the rectangle, and really little more work
remains to be done).
It is also quite similar to the "Chain of four equilateral triangles"
by Lewis Simon & Bennet Arnstein, from a square (in the "Modular
Origami Polyhedra" book), but without the locking tab.
Due to this last similarity, I am inclined to believe that it might be
Lewis Simon's design, but of course I might be wrong. I hope some
O-lister knows.
Should anybody know, please tell me.
All the best!
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JOSE IGNACIO ROYO PRIETO
Matematika Aplikatua Saila
University of the Basque Country UPV/EHU
Alameda de Urquijo s/n
48013 Bilbao
SPAIN
Phone: 00 34 946013987
FAX: 00 34 946014244
E-mail: [email protected]
Web: http://www.ehu.eus/joseroyo
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