How Sculptures Are Becoming Spaceships

How Sculptures Become Spaceships

For decades, the gravity defying sculptures of Kenneth Snelson have risen to the skies with a unique state of energy. These expansive nests of cable and steel rods possess a tranquil and rhythmic aesthetic quality linking geometry with art. It’s a process Snelson has perfected over the years. His sculptures are always a hit with the art-loving community and the not-so-art-loving community. He calls his combination of tension and compression, “tensegrity.” He and Buckminster Fuller seem to have come up with the idea together.

But as things go, good ideas have a multitude of applications. And now there is a new use for tensegrity—spaceships. NASA is now planning to build tensegrity robots called Super Ball Bots. These flexible robots are to roll like tumbleweeds around on the surfaces of planets sometime in the near future. NASA plans to drop the robots from high altitudes and just let them squish on the surface of the planet. Once they’ve done that, they’ll flex back into form and be good as new. Their combination of tension and compression makes these structures both flexible and durable. Without a central body, they basically look like a ball of sticks. Each little stick has its own brain and motor. Each brain works fairly independently and gang together to create an interesting system of interconnected computers that can continue navigating the robot even if some fail. The bots navigate by the each motor tightening or releasing tension in the cables.

How Sculptures Become Spaceships

It’s interesting to find useful solutions in one domain and then see those same principles jump to solve problems in other domains. You can call it synthesis, emulation, association or whatever. But in general, it’s creativity.

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