# SLS Launch Delays: NASA's Troubling Journey Ahead
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Chapter 1: A Troubling Start
On June 13, 2009, NASA attempted to launch the Space Shuttle Endeavour. During the fueling process, a significant issue arose: hydrogen began leaking from a seal, posing a severe fire and explosion hazard. Consequently, the launch was aborted, the damaged seal was replaced, and a new attempt was scheduled. However, during this second attempt, another leak appeared, leading to further delays. Two more launch cancellations followed due to weather-related issues, before Endeavour finally lifted off on its fifth try in mid-July.
Fast forward to earlier this month, and a similar scenario unfolded when a hydrogen leak halted the second launch attempt of the SLS rocket. Engineers discovered the leak during launch preparations, but despite intense efforts to rectify the situation, they were unable to resolve it before the launch window expired. NASA later indicated that the leak originated from a seal intended to secure the hydrogen inlet, which was likely damaged when operators mistakenly opened the incorrect valve during the fueling process. Although the mistake was quickly corrected, it seems it was too late to prevent the seal's damage.
The parallels between these recent events and the Shuttle's delays are striking. The SLS was designed using components from the Shuttle due to Congressional pressure, leading to the adoption of several design flaws, particularly those related to hydrogen fueling.
As September comes to a close, a new window for launching presents itself at the end of the month. Should NASA be prepared, this could provide another opportunity for flight. A later launch window in mid-October would allow additional time for any necessary repairs.
This end of September is poised to be a hectic time for NASA. Two launches are already on the calendar: one to send a new crew to the International Space Station, scheduled for October 3rd, and another, the DART asteroid probe, set for September 26th. If preparations for the SLS are completed in time, Artemis I could also join these upcoming missions.
Section 1.1: Battery Concerns
A significant challenge lies in the rocket's internal battery system, which powers the "flight termination system." This module is crucial for safely destroying the rocket if it strays off its intended path after launch. Typically, these batteries should be replaced every three weeks, but this task is complex and would likely necessitate returning the rocket to the hangar.
Despite this three-week guideline, NASA believes the rocket remains safe even if the batteries are left in place for a few additional weeks. However, this theory needs official certification before the launch can proceed, particularly since the deadline has already passed.
Subsection 1.1.1: Launch Dates
If the necessary tests and certifications can be completed promptly, NASA has pinpointed two potential launch dates: the morning of September 23rd and September 27th. If these attempts fail, the next chance to launch will not arise until late October.
Section 1.2: Implications for NASA
The recent failed launch attempts have been disappointing and somewhat embarrassing for NASA. These events have not quelled the voices of critics regarding the SLS rocket and may intensify calls for alternative solutions. Should Elon Musk successfully launch Starship, a vehicle with comparable capabilities, before NASA can get the SLS into orbit, the calls for change are likely to grow even louder.
Chapter 2: The Path Forward
This article was initially published by The Quantum Cat, a regular newsletter focused on space and physics. Subscribe for free today!