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Bars are connected along the vertices of parallel polygons made of lines. When the polygons are rotated, the bars tilt and form helices, which extend or retract. This is the basic geometry of the device, produced by Astro Aerospace, a business unit of Northrop Grumman Space Technology. It is used to deploy antennas in space.
Contributed by: Sándor Kabai and Szaniszló Bérczi (June 2009)
Open content licensed under CC BY-NC-SA
Wolfram Demonstrations Project
Published: June 4 2009