Goodyear, NASA Honored for 'Spring' Tire That Won't Go Flat - Tire Review Magazine

Goodyear, NASA Honored for ‘Spring’ Tire That Won’t Go Flat

The National Aeronautics and Space Administration (NASA) and Goodyear Tire & Rubber Co. will be honored with the R&D 100 Award for an airless tire capable of transporting large, long-range vehicles across the surface of celestial bodies such as the moon or Mars, Goodyear reported.

The tire, developed last year, is constructed out of 800 load-bearing springs. It is designed to carry much heavier vehicles over much greater distances than the wire mesh tire (which Goodyear also contributed to) that was previously used on the Apollo Lunar Roving Vehicle. The new tire could allow for broader exploration and the eventual development and maintenance of planetary outposts, as well as having applications on Earth, the tiremaker said.

“With the combined requirements of increased load and life, we needed to make a fundamental change to the original moon tire,” said Vivake Asnani, principal investigator for the project at NASA’s Glenn Research Center in Cleveland. “What the Goodyear-NASA team developed is an innovative, yet simple network of interwoven springs that does the job. The tire design seems almost obvious in retrospect, as most good inventions do.”

The Spring Tire was installed last year on NASA’s Lunar Electric Rover test vehicle and put through its paces at NASA’s Johnson Space Center in Houston, where it performed successfully.

“This tire is extremely durable and extremely energy efficient,” said Jim Benzing, Goodyear’s lead innovator on the project. “The spring design contours to the surface on which it’s driven to provide traction. But all of the energy used to deform the tire is returned when the springs rebound. It doesn’t generate heat like a normal tire.”

According to Goodyear engineers, traditional rubber, pneumatic tires used on Earth have little utility on the moon because rubber properties vary significantly between the extreme cold and hot temperatures experienced in the shaded and directly sunlit areas of the moon. Unfiltered solar radiation degrades rubber, and pneumatic tires pose an unacceptable risk of deflation.

According to Asnani, “A hard impact that might cause a pneumatic tire to puncture and deflate would only damage one of the 800 load bearing springs (of the Spring Tire). Along with having this ultra-redundant characteristic, the tire has a combination of overall stiffness, yet flexibility that allows off-road vehicles to travel fast over rough terrain with relatively little motion being transferred to the vehicle.”

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