SLS, or "Slow Launch System", or "Senate Launch System": How Musk has disrupted business as usual in the Military Industrial Complex
/
(AI Summary of the term):
The military-industrial complex is an informal partnership between a nation's military, the government, and private defense businesses.
Key Parts of the System
The Military: Asks for advanced weapons, gear, and technology to keep the country safe.
Private Companies: Businesses like Lockheed Martin, Boeing, and Northrop Grumman build planes, tanks, and guns.
The Government: Politicians vote to give money to the military, which then pays these private companies.
Elon Musk’s purchase of Twitter, ending its censorship, and opening its pages to corrective “community notes”, broke the monolithic liberal news empire that has shaped and controlled the public’s information feed for decades and may eventually prove to be the most historical significant of all his accomplishments. Until then, there’s Space X and its effect on everything from space exploration to low-cost telecommunications to consider.
Herewith, a brief look at the illuminating case of the Space Launch System vs. Space X, a compare and contrast exercise. The SLS is a perfect example of the way the government procurement process “works”, and why Musk poses such a threat to it.
AI summary of the history of the SLS, with commentary from FWIW:
Congress mandated that the Space Launch System (SLS) use legacy hardware—specifically Space Shuttle-derived components—primarily to preserve highly specialized aerospace jobs, maintain industrial infrastructure, and accelerate development after the Shuttle program was retired.
No one expects the Spanish Inquisition — nor a private company that can do a job far faster and far more cheaply than a cozy joint-project between politicians and their favorite donors.
When the NASA Authorization Act of 2010 was passed, commercial alternatives like SpaceX were in their infancy, and the cancellation of the prior Constellation program threatened to leave thousands of workers unemployed and shut down critical facilities across multiple states.
Which is how the defense industry works: spread production of an individual program across as many congressional districts as possible, so that there’s a strong, vocal group of politicians who will fight any threat to the program’s funding.
The Core Motivations
Job Preservation & Political Alignment: The retirement of the Space Shuttle threatened thousands of highly technical jobs across the country. Key legislators—including Senators Richard Shelby (Alabama), Bill Nelson (Florida), and Kay Bailey Hutchison (Texas)—structured the law to protect the local workforces and facilities that produced external tanks in Louisiana, tested engines in Mississippi, and cast solid rockets in Utah. This earned the rocket its political nickname: the "Senate Launch System."
Cost Efficiency (The Retrospective Myth): On paper, lawmakers believed that reusing existing, flight-proven hardware (like the multi-million dollar RS-25 main engines and solid rocket boosters) would radically lower development costs and prevent NASA from starting from scratch.
Reused Legacy Architecture: Relying heavily on modified Space Shuttle-era engines and components limits modern manufacturing efficiencies and scalability
How’s it going? Not well, but also no differently than any other government project
AI Overview
NASA's Space Launch System (SLS) originated from the NASA Authorization Act of 2010, which mandated a heavy-lift rocket utilizing heritage Space Shuttle hardware. Following years of developmental delays, the uncrewed Artemis I successfully launched in November 2022, followed by the crewed Artemis II flight in April 2026.
Origins and Congressional Mandate
Cancellation of Constellation: President George W. Bush’s lunar program was canceled in 2010 by President Barack Obama due to budget overruns.
The 2010 Act: Congress passed a compromise law requiring NASA to build a civil heavy-lift vehicle using existing Space Shuttle and Constellation contracts.
Heritage Design: The architecture reused modified RS-25 rocket engines and large solid rocket boosters.
By “heritage” read obsolete, hugely expensive technology.
Development and Testing Struggles
Production Delays: Manufacturing the core stage at the NASA Michoud Assembly Facility faced severe technical and timeline setbacks.
Green Run Testing: The core stage underwent a prolonged Green Run test campaign at Stennis Space Center to validate its four RS-25 engines.
Operational Milestones
Artemis I (November 2022): The inaugural uncrewed test flight of the Block 1 configuration validated integrated performance around the Moon.
Artemis II (April 2026): The first crewed flight carried astronauts past the Moon, ending a 50-year hiatus of human spaceflight beyond low Earth orbit.
Space X receives government subsidies? Not hardly — it’s the taxpayer who has gained from this alternative supplier.
Funding Architecture: Taxpayers fully shoulder the financial burden of SLS development. Conversely, the majority of Starship's development is funded privately through SpaceX's internal profits—largely generated by their Starlink satellite constellation revenue.
Ars Technica’s Eric Berger has been observing and reporting on the SLS for years; here’s one sample:
The Space Launch System rocket program is now a decade and a half old, and it continues to be dominated by two unfortunate traits: It is expensive, and it is slow.
The massive rocket and its convoluted ground systems, so necessary to baby and cajole the booster’s prickly hydrogen propellant on board, have cost US taxpayers in excess of $30 billion to date. And even as it reaches maturity, the rocket is going nowhere fast.
You remember the last time NASA tried to launch the world’s largest orange rocket, right? The space agency rolled the Space Launch System out of its hangar in March 2022. The first, second, and third attempts at a wet dress rehearsal—elaborate fueling tests—were scrubbed. The SLS rocket was slowly rolled back to its hangar for work in April before returning to the pad in June.
The fourth fueling test also ended early but this time reached to within 29 seconds of when the engines would ignite. This was not all the way to the planned T-9.3 seconds, a previously established gate to launch the vehicle. Nevertheless mission managers had evidently had enough of failed fueling tests. Accordingly, they proceeded into final launch preparations.
The first launch attempt (effectively the fifth wet-dress test), in late August, was scrubbed due to hydrogen leaks and other problems. A second attempt, a week later, also succumbed to hydrogen leaks. Finally, on the next attempt, and seventh overall try at fully fueling and nursing this vehicle through a countdown, the Space Launch System rocket actually took off. After doing so, it flew splendidly.
That was November 16, 2022. More than three years ago. You might think that over the course of the extended interval since then, and after the excruciating pain of spending nearly an entire year conducting fueling tests to try to lift the massive rocket off the pad, some of the smartest engineers in the world, the fine men and women at NASA, would have dug into and solved the leak issues.
You would be wrong.
…..
Hardware scarcity, due to cost, is but one of several problems with the SLS rocket architecture. Probably the biggest one is its extremely low flight rate, which makes every fueling and launch opportunity an experimental rather than operational procedure. This has been pointed out to NASA, and the rocket’s benefactors in Congress, for more than a decade. A rocket that is so expensive it only flies rarely will have super-high operating costs and ever-present safety concerns precisely because it flies so infrequently.
Acknowledging the low flight rate issue
Until this week, NASA had largely ignored these concerns, at least in public. However, in a stunning admission, NASA’s new administrator, Jared Isaacman, acknowledged the flight-rate issue after Monday’s wet-dress rehearsal test failed to reach a successful conclusion. “The flight rate is the lowest of any NASA-designed vehicle, and that should be a topic of discussion,” he said as part of a longer post about the test on social media.
The reality, which Isaacman knows full well, and which almost everyone else in the industry recognizes, is that the SLS rocket is dead hardware walking. The Trump administration would like to fly the rocket just two more times, culminating in the Artemis III human landing on the Moon. Congress has passed legislation mandating a fourth and fifth launch of the SLS vehicle.
However, one gets the sense that this battle is not yet fully formed, and the outcome will depend on hiccups like Monday’s aborted test; the ongoing performance of the rocket in flight; and how quickly SpaceX’s Starship and Blue Origin’s New Glenn vehicle make advancements toward reliability. Both of these private rockets are moving at light speed relative to NASA’s Slow Launch System.
During the news conference, I asked about this low flight rate and the challenge of managing a complex rocket that will never be more than anything but an experimental system. The answer from NASA’s top civil servant, Amit Kshatriya, was eye-opening.
“You know, you’re right, the flight rate—three years is a long time between the first and second,” NASA’s associate administrator said. “It is going to be experimental, because of going to the Moon in this configuration, with the energies we’re dealing with. And every time we do it these are very bespoke components, they’re in many cases made by incredible craftsmen. … It’s the first time this particular machine has borne witness to cryogens, and how it breathes, and how it vents, and how it wants to leak is something we have to characterize. And so every time we do it, we’re going to have to do that separately.”
So there you have it. Every SLS rocket is a work of art, every launch campaign an adventure, every mission subject to excessive delays. It’s definitely not ideal.
