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That’s now five space station prototypes blown up for science’s sake.
The Colorado company Sierra Space, which is creating an inflatable module for an International Space Station (ISS) successor, deliberately exploded a new design on Aug. 17 that included a metal plate. (In this case, the plate was a cheaper stand-in for a window, but metal can also be used to simulate robotic attachments or other items.)
These “burst tests,” conducted with “softgoods” built by Delaware-based company ILC Dover, are essential to test the limits of each one-third-scale module before the design flies in space, Sierra Space officials emphasized in a press release issued on Wednesday (Sept. 20). The softgoods are sewn and woven fabrics, mostly Vectran, that become rigid when inflated.
Sierra aims to have the module ready in 2030 for the Orbital Reef space station led by Jeff Bezos’ Blue Origin, which has received early-stage NASA funding. Sierra also plans to provide a ship capable of carrying cargo and crew, called Dream Chaser, which has undergone a few flight tests over the years.
Related: NASA looks to private outposts to build on International Space Station’s legacy
Artist’s illustration of Orbital Reef, a private space station project involving Blue Origin, Sierra Space and a number of other partners. (Image credit: Sierra Space/Blue Origin)
“This is a phenomenal achievement,” Shawn Buckley, senior director of engineering and product evolution director for Sierra Space Destinations, said in the statement. Last month’s test, he said, “provides the necessary engineering foundation” to do full-scale tests of the module, called LIFE (Large Integrated Flexible Environment).
The “ultimate burst pressure” (UBP) test results showed a 33% margin over the certification standard for a full-scale module, which Sierra Space officials said is a nearly 20% improvement over previous designs.
Sierra previously passed a quartet of tests on LIFE prototypes. Two other UBP tests were performed in July and November 2022; both kept boosting the pressure in test modules until they exploded. Then two creep tests, in which modules had to spend long periods of time at higher-than-usual pressures, were completed in December 2022 and February 2023.
All of these tests were performed at NASA’s Marshall Space Flight Center in Alabama; Sierra also recently signed a reimbursable Space Act Agreement with that center for more LIFE work.
The ISS has been working in space since 1998, and remains in excellent health. That said, the station’s international partners and NASA have mainly agreed to operate the orbiting complex until 2030. (Russia, for now, is committing only to 2028; while space station relations are normal with that partner, its internationally condemned war in Ukraine has severed most of its other partnerships.)
NASA is also laying the groundwork for future space stations to replace the longstanding research facility. These would be commercial facilities, with NASA participation and funding. In 2021, the agency granted funding to three consortiums (including Blue Origin’s) to receive development assistance for that effort.
Additionally, Houston-based company Axiom Space has a separate agreement to create its own space station modules to attach to the ISS starting as soon as 2026. The set would eventually detach into a free-flying space station.
In recent months, NASA officials have said they are doing their best to minimize any gap in research availability between the ISS and the new space stations. Given that the agency wants to have a two-year transition, this would mean that at least one of the new stations would have to be open around 2028, at least under the current timeline. The White House Office of Science and Technology Policy issued a strategy in March of this year with a proposed plan for the transition.
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Elizabeth Howell (she/her), Ph.D., is a staff writer in the spaceflight channel since 2022 covering diversity, education and gaming as well. She was contributing writer for Space.com for 10 years before joining full-time. Elizabeth’s reporting includes multiple exclusives with the White House and Office of the Vice-President of the United States, an exclusive conversation with aspiring space tourist (and NSYNC bassist) Lance Bass, speaking several times with the International Space Station, witnessing five human spaceflight launches on two continents, flying parabolic, working inside a spacesuit, and participating in a simulated Mars mission. Her latest book, “Why Am I Taller?”, is co-written with astronaut Dave Williams. Elizabeth holds a Ph.D. and M.Sc. in Space Studies from the University of North Dakota, a Bachelor of Journalism from Canada’s Carleton University and a Bachelor of History from Canada’s Athabasca University. Elizabeth is also a post-secondary instructor in communications and science at several institutions since 2015; her experience includes developing and teaching an astronomy course at Canada’s Algonquin College (with Indigenous content as well) to more than 1,000 students since 2020. Elizabeth first got interested in space after watching the movie Apollo 13 in 1996, and still wants to be an astronaut someday. Mastodon: https://qoto.org/@howellspace
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