Tag: sls
NASA’s SLS Launch Was a Roaring Success—Except for Its Secondary Payloads
Japan’s tiny lunar lander never got to touch down on the Moon, as it failed to communicate with ground controllers shortly after launching aboard NASA’s Space Launch System (SLS) rocket. The spacecraft was one of 10 cubesats that participated in the Artemis 1 launch, which endured several delays that may have affected…
A Satellite That Launched Aboard SLS Is Already in Trouble
The launch of NASA’s Artemis 1 mission sent the Orion capsule on a journey to the Moon, in addition to 10 cubesats included as secondary payloads. The Space Launch System’s upper stage successfully deployed the tiny satellites yesterday, but one of them appears to be malfunctioning.
Thrilling Photos of NASA’s SLS Megarocket Launch to the Moon
The most anticipated launch of the year has finally happened, so it gives us great pleasure to show you some of the more memorable moments from this historic event. NASA’s most powerful rocket ever, Space Launch System, has passed its biggest test yet.
NASA inspects SLS moon rocket following Hurricane Nicole
China’s New Megarocket Design Shows NASA’s SLS Is Already Obsolete
Reusable rockets, whether large or small, are the future, and as a newly unveiled model of a Long March 9 launch vehicle suggests, Chinese rocket scientists are coming around to the idea.
NASA Declares Tanking Test of SLS Megarocket a Success
A demonstration to confirm a repaired hydrogen leak appears to have gone well, with NASA declaring Wednesday’s cryogenic tanking test a success. Engineers still need to review the results, but the space agency could be on track to perform its third launch attempt of its SLS megarocket in just six days—a mission that…
After SLS rocket flop, Space Coast visitors make do with SpaceX launch
SLS fuel leak likely to delay Artemis 1 launch to October
NASA’s next-generation Space Launch System likely won’t fly in September. After a fuel leak forced the agency to scrub its second attempt to launch Artemis 1, there had been some hope the mission could get underway before its current launch window ended on September 6th. That won’t be the case.
“We will not be launching in this launch period,” Jim Free, NASA’s associate administrator for exploration systems development, told a room full of journalists after the events of Saturday morning. “This was not a manageable leak,” Artemis Mission Manager Michael Sarafin added, referring to the “quick disconnect” fitting that gave NASA so much trouble yesterday. Ground crew at Kennedy Space Center attempted to troubleshoot the issue three times before recommending a “no go” for Saturday’s launch.
According to Sarafin, the leak began after one of the fuel lines to Artemis 1’s core booster went through a brief and “inadvertent” overpressurization. An “errant” manual command from Mission Control triggered the incident. As of Saturday, Sarafin said it was too early to know if that was the cause of the fuel leak, but there was enough flammable hydrogen gas near the rocket that it would not have been safe to launch. “We want to be deliberate and careful about drawing conclusions here, because correlation does not equal causation,” he added.
— Jim Free (@JimFree) September 3, 2022
Whatever caused the leak, NASA now needs to replace the non-metallic gasket that was supposed to prevent hydrogen from escaping at the quick disconnect. The agency has two options as to how to proceed. It could either replace the gasket at Launch Pad 39B or the KSC’s Vehicle Assembly Building. Both have advantages and disadvantages.
Doing the work on the pad would allow NASA to test the system at cryogenic temperatures. That would give the agency a better idea of how the rocket will behave once it’s ready to launch again. However, NASA would need to build an enclosure around the SLS. At the VAB, meanwhile, the building would act as the enclosure but would limit testing to ambient temperatures only.
In the end, the SLS will likely end up at the VAB no matter what since NASA needs to test the batteries in the vehicle’s flight termination system every 20 days. The system allows the Space Force to destroy the rocket if it flies off course or something else goes awry during flight. NASA can only conduct that testing in the VAB, and the Space Force recently gave the agency a five-day extension on the usual deadline.
All told, Artemis 1’s next earliest launch window opens on September 16th and then closes on October 4th. That opening includes a potential conflict with another mission. Space X’s Crew-5 flight is scheduled to lift off on October 3rd from Kennedy Space Center. Therefore, NASA is more likely to aim for the subsequent window that opens on October 17th and runs until the end of the month. We’ll know more next week when NASA holds another press conference, but NASA Administrator Bill Nelson was adamant the agency wouldn’t attempt to launch Artemis 1 until it feels the SLS is ready to fly. “We do not launch until we think it’s right,” he said. “I look at this as part of our space program, of which safety is at the top of our list.”
Problems Delay Launch of NASA’s SLS Rocket – Again
But instead on Saturday morning, “NASA scrubbed its second attempt to launch the Artemis I mission into lunar orbit…” reports CNET. “During a press conference later in the day, Jim Free, an associate administrator at NASA Headquarters, said we shouldn’t expect to see a third attempt within this launch period, which culminates Tuesday.” (Though the mission manager the next launch attempt could be as late as mid-October.)
“This time, the culprit was a liquid hydrogen leak that showed up while the team was loading the rocket’s core stage….”
According to the space agency, the leak occurred “while loading the propellant into the core stage of the Space Launch System rocket” and that “multiple troubleshooting efforts to address the area of the leak, by reseating a seal in the quick disconnect where liquid hydrogen is fed into the rocket, did not fix the issue.”
This is the second time the Artemis I mission has been delayed. Liftoff attempt No. 1 was scheduled for Monday, but launch director Charlie Blackwell-Thompson had to call a scrub then as well, because of an unyielding problem with what’s known as an engine bleed test. (This process is meant to allow the engines to chill to the right temperature by releasing a small amount of the fuel).
“We were unable to get the engines within the thermal conditions required to commit to launch,” Artemis mission manager Mike Sarafin said during a press conference on Tuesday. “In combination with that, we also had a bent valve issue on the core stage, and it was at that point that the team decided to knock off the launch attempt for that day.”
Read more of this story at Slashdot.