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NASA just put its new propulsion system to the test, powering a 3D-printed rotating detonation rocket engine for a sustained burn that lasted three times as long as the first test.
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The Rotating Detonation Rocket Engine, or RDRE, produced more than 5,800 pounds of thrust for a total of 251 seconds (a little longer than four minutes) during a recent test at NASA’s Marshall Space Flight Center in Huntsville, Alabama, the space agency announced this week.
“That kind of sustained burn emulates typical requirements for a lander touchdown or a deep-space burn that could set a spacecraft on course from the Moon to Mars,” Thomas Teasley, a combustion devices engineer at Marshall who leads the RDRE tests, said in a statement.
The rocket engine generates thrust by detonation, a supersonic combustion that produces more power while using less fuel compared to the propulsion systems typically used today. As a result, the new propulsion system could allow for both crewed landers and interplanetary vehicles to travel to deep space destinations such as the Moon and Mars, according to NASA.
RDRE was tested for the first time in 2022, producing more than 4,000 pounds of thrust for nearly a minute. The latest test was designed to “better understand how to scale the combustor to different thrust classes, supporting engine systems of all types and maximizing the variety of missions it could serve, from landers to upper stage engines to supersonic retropropulsion, a deceleration technique that could land larger payloads – or even humans – on the surface of Mars,” NASA wrote.
NASA engineers are currently working to figure out how to scale the technology for higher performance, hoping to develop a fully reusable 10,000-pound (4,500-kilogram) RDRE.
“The RDRE enables a huge leap in design efficiency,” Teasley said. “It demonstrates we are closer to making lightweight propulsion systems that will allow us to send more mass and payload further into deep space, a critical component to NASA’s Moon to Mars vision.”
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