[email protected] asked: >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). It is difficult to tell from this information exactly which unit you are talking about. There are several similar units that start from a 1:sqrt3 or bronze rectangle that look essentially similar ... but I would not call any of them Sonobe units. A true 'equilateral Sonobe' or at least a true 'equilateral corner-pocket Sonobe' can be made from a bronze rectangle by using the same method used to make the Nick Robinson rhombic parallelogram module from a silver rectangle. The module you are talking about is however probably the Abe module (although it may just possibly be the Terada module. The Abe module is the simplest of the two but both look the same when assembled.) Tomoko told me about the Abe module many years ago but I have never diagrams for it in print. I assume it is by Hisashi Abe, he of tri-section fame, but do not have any evidence to support this. If so it is probably from the early 1980's. If anyone has further information about this I would love to hear it. I have been investigating what these modules will do for some years. Dave
