NASA has finally acknowledged the elephant in the room regarding its troubled Space Launch System (SLS) rocket, a behemoth of a vehicle that's been plagued by delays and expensive setbacks. The SLS program is now over 15 years old and still struggling to overcome two major issues: it's incredibly expensive, with costs exceeding $30 billion so far, and it's painfully slow.
The latest attempt at launching the Artemis II mission on the SLS rocket ended in failure when a liquid hydrogen leak developed during a wet-dress rehearsal test. The issue is not new, as similar problems arose during the Artemis I mission three years ago. Despite developing various mitigation strategies, including slowing down the flow of hydrogen and temporarily shutting off its supply, NASA was unable to prevent the leak.
The SLS rocket's design is inherently flawed due to its extremely low flight rate, making every fueling and launch attempt an experimental procedure rather than a routine operation. This has resulted in high operating costs and ongoing safety concerns. The lack of frequent flights also means that the rocket's performance can only be truly characterized through real-world testing.
On Monday, NASA Administrator Jared Isaacman acknowledged the SLS rocket's low flight rate issue for the first time, stating that it should be a topic of discussion. He recognized that the rocket is "dead hardware walking" and that Congress has mandated additional launches, including a fourth and fifth attempt, which will push the vehicle to its limits.
However, experts argue that there are options available to mitigate these issues without resorting to more expensive and complex testing procedures. For example, building one or more "test" tanks to stress the hardware and ensure compatibility with ground systems could have been explored earlier in the program.
The outcome of this battle between NASA's SLS rocket and its critics remains uncertain. The fate of the Artemis II mission hangs in the balance, and it will depend on how quickly SpaceX's Starship and Blue Origin's New Glenn vehicles make advancements toward reliability.
The latest attempt at launching the Artemis II mission on the SLS rocket ended in failure when a liquid hydrogen leak developed during a wet-dress rehearsal test. The issue is not new, as similar problems arose during the Artemis I mission three years ago. Despite developing various mitigation strategies, including slowing down the flow of hydrogen and temporarily shutting off its supply, NASA was unable to prevent the leak.
The SLS rocket's design is inherently flawed due to its extremely low flight rate, making every fueling and launch attempt an experimental procedure rather than a routine operation. This has resulted in high operating costs and ongoing safety concerns. The lack of frequent flights also means that the rocket's performance can only be truly characterized through real-world testing.
On Monday, NASA Administrator Jared Isaacman acknowledged the SLS rocket's low flight rate issue for the first time, stating that it should be a topic of discussion. He recognized that the rocket is "dead hardware walking" and that Congress has mandated additional launches, including a fourth and fifth attempt, which will push the vehicle to its limits.
However, experts argue that there are options available to mitigate these issues without resorting to more expensive and complex testing procedures. For example, building one or more "test" tanks to stress the hardware and ensure compatibility with ground systems could have been explored earlier in the program.
The outcome of this battle between NASA's SLS rocket and its critics remains uncertain. The fate of the Artemis II mission hangs in the balance, and it will depend on how quickly SpaceX's Starship and Blue Origin's New Glenn vehicles make advancements toward reliability.