The test is a vital step in NASA’s Artemis programme to put the first woman and the next man on the Moon in 2024.
NASA ignited all four engines of a deep space exploration rocket – the Space Launch System (SLS) – for the first time on Saturday, but the “hot fire” test ended much earlier than expected.
Mounted in a test facility at NASA’s Stennis Space Center in Mississippi, the SLS’s 212-foot (65-metre) tall core stage roared to life at 4:27pm local time (22:27 GMT) for more than a minute before the exercise was aborted.
The test was supposed to last for eight minutes to simulate the rocket’s climb to orbit.
During the live broadcast of the test, NASA did not explain the reason for the early shutdown, but Wayne Hale, a former manager of NASA’s space shuttle programme, suggested a “major component failure”.
Well MCF was not a call this ascent flight director ever wanted to hear: Major Component Failure is detected by the SSME controller.
— Wayne Hale (@waynehale) January 16, 2021
Completely concur. Very valuable. Now the discussions will begin as to whether there was enough data collected or if the test needs to be rerun – either way that engine will likely be changed out. Of course the experts will probably tell us at the post test conference shortly https://t.co/523kXgoVl5
— Wayne Hale (@waynehale) January 16, 2021
The fiery show, the last leg of NASA’s nearly year-long “Green Run” test campaign, was a vital step for the space agency and its top SLS contractor, Boeing, before the rocket’s first launch in November this year.
The success of that unmanned mission, called “Artemis 1”, will set the stage for the first landing on the Moon by humans since the Apollo 17 mission in 1972. US President Donald Trump has pushed for that trip – which will also see the first woman on the Moon – to happen by 2024.
It was unclear whether Boeing and NASA would have to repeat Saturday’s test, a prospect that could push the debut launch into 2022.
Speaking to reporters, John Honeycut, SLS Program Manager said it was hard to detect what exactly went wrong.
“What I saw in the control room that I was in it’s pretty much the same thing you guys saw”, he said.
NASA administrator Jim Bridenstine said the agency “got lots of data that we’re going to be able to sort through” to determine if a do-over is needed.
“I know not everybody is feeling as happy as we otherwise could because we wanted to get eight minutes of a hot fire and we got over a minute, but I just want to remind people where we’ve been and where we’re going and what an important milestone this is,” he added.
The expendable super heavy-lift SLS is three years behind schedule and nearly $3bn over budget.
Critics have long argued for NASA to retire the rocket’s shuttle-era core technologies, which have launch costs of $1bn or more per mission, in favour of newer commercial alternatives that promise lower costs.
By comparison, it costs as little as $90m to fly the massive, but less powerful, Falcon Heavy rocket designed and manufactured by Elon Musk’s SpaceX, and some $350m per launch for United Launch Alliance’s legacy Delta IV Heavy.
While newer, more reusable rockets from both companies – SpaceX’s Starship and United Launch Alliance’s Vulcan – promise heavier lift capacity than the Falcon Heavy or Delta IV Heavy, potentially at a lower cost, SLS backers have argued it would take two or more launches on those rockets to launch what the SLS could carry in a single mission.
Reuters reported in October that President-elect Joe Biden’s space advisers aimed to delay Trump’s 2024 goal, casting fresh doubts on the long-term fate of SLS just as SpaceX and Jeff Bezos’ Blue Origin scramble to bring rival new heavy-lift capacity to market.
NASA and Boeing engineers have stayed on a 10-month schedule for the Green Run “despite having significant adversity this year,” Boeing’s SLS manager John Shannon told reporters this week, citing five tropical storms and a hurricane that hit Stennis, as well as a three-month closure after some engineers tested positive for the coronavirus in March.
