What is Juno's Spinner

Juno's spinner are polyhedra models I discovered that links and transforms. With a simple operation, it expands and shrinks.

Juno's spinner (the usual model of that) consists of two types of elements. A rotational joint connects the end of each element, and the whole model transform together by a motion being transmitted through the joint. Rotational movement of an element changes the distance of each element.

Type Element-A Element-B Rotational
Icosahedron Icosahedron 20 12 60
Dodecahedron Dodecahedron 12 20 60
Octahedron Octahedron 8 6 24
Cube Cube 6 8 24
Tetrahedron Tetrahedron 4 4 12

Dr. Hugo F. VERHEYEN did similar and comprehensive study about transformable polyhedra many years ago. We can see his great work at "AN ALTERNATIVE GENERATION AND TRANSFORMATION THEORY FOR UNIFORM POLYHEDRA (3d edition)" that had published in 1981.

For more informations, please check it out "Dipolygonids - Jitterbug Transformers" pages in Gilbert Marc FLEURENT's website.