Biggest Plot Twist: Starship Flight 9 Booster Landing with ONLY 2 Engines

Exciting developments are unfolding at SpaceX, and the company has just announced a significant adjustment aimed at reducing the booster engines’ landing burn duration on its upcoming flight. But what’s the reasoning behind this change?

At the same time, preparations for the next mission are ramping up with prototype production and testing moving full speed ahead. Meanwhile, NASA has revealed new updates regarding private crewed missions to the International Space Station (ISS).

SpaceX’s Bold Shift for Starship Flight 9: A New Era of Reusability

SpaceX’s decision to select B14 (Booster 14) for Starship Flight 9 marks a pivotal moment in the evolution of the Starship program. This is a true turning point that signals the beginning of a new era of reusability. Until now, the focus has primarily been on validating the basic flight capabilities of Starship and Superheavy. But with B14, SpaceX is clearly shifting gears toward refining its recovery techniques and testing the limits of its landing systems.

Previously, it was announced that B14 would forgo a Mechazilla-assisted landing and instead splash down in the ocean. This change alone indicated a more cautious, data-focused approach. However, in a surprise update, SpaceX revealed an even more intriguing modification to the flight plan.

The Bold Decision: Landing with ONLY Two Engines

According to internal sources, B14 will intentionally shut down one of its three inner engines during the landing phase, relying on only two engines for the final burn. To understand the significance of this, it’s important to review how the Superheavy landing typically works.

During descent, all 13 center and inner ring engines initially ignite to slow the vehicle. Once the velocity is controlled, the outer engines shut off, leaving the three inner engines equipped with gimbal capabilities to handle the final descent. These three engines are critical for both deceleration and precise navigation to the landing target.

But on this flight, SpaceX will deliberately simulate an engine-out scenario by disabling one of those three engines. Why? This is a critical test of the system’s resilience and adaptability. If successful, the data gathered could validate a backup landing configuration—one that would allow SpaceX to proceed with landings even in the event of an engine failure rather than aborting and diverting to a splashdown.

The Importance of Contingency Planning for Starship

This kind of contingency planning is essential, especially as SpaceX looks to make Mechazilla-assisted landings a routine part of Starship recovery. In such scenarios, any mid-flight engine failure could jeopardize not just the mission but also the infrastructure on the ground. Proving that a two-engine landing is both possible and safe could give SpaceX the confidence to continue with recovery attempts even under suboptimal conditions.

Lessons from Past Starship Flights: Why the Change?

The test appears to be motivated, in part, by the recent issues seen during Flights 7 and 8. In Flight 8, one of the Superheavy’s engines failed to reignite entirely. Thankfully, it was located in the outer ring. But if a similar failure were to occur in one of the three central landing engines, the outcome could be much worse.

Testing this scenario now, in a controlled environment over the ocean, is a smart move. It’s also worth noting that B14’s upcoming flight could be its final act as a test article. After contributing valuable data from landing attempts, B14 is now being used to push the limits of what the system can do.

S35 and the Need for Engine Reliability

Meanwhile, S35, the ship assigned to pair with B14, is also playing a key role. As the ship has fewer engines than Superheavy, each one carries more weight in ensuring mission success. Any failure here would have an even larger impact, making thorough testing and reliability improvements a top priority.

S35, like B14, has experienced delays due to engine issues. SpaceX has already acknowledged that problems with the ignition system were at least partially to blame for previous flight failures. In response, updates and improvements have been made to the igniter hardware, and these refinements are currently being verified in both B14 and S35.

Current Status of Flight 9 Preparations

Preparations for Flight 9 are now in full swing. B14 recently completed a successful static fire test and is undergoing further inspections in Mega Bay 1, with a particular focus on the engine section. Observers have also noted that grid fins on the booster were being adjusted during transport—another critical component in controlling the booster’s descent. These refinements indicate that SpaceX is taking no chances.

S35 is also advancing. It is currently receiving its engines and will soon be transported to Massey for additional tests. With both the booster and ship being prepped for flight, all eyes are on how SpaceX will execute this critical test campaign.

Why SpaceX’s Bold Move is So Exciting

What makes this so exciting is that it’s not just a technical validation—it’s a bold demonstration of SpaceX’s approach to rapid iteration and redundancy. By testing a potential failure scenario deliberately, they’re showing just how confident and ambitious they are about Starship’s future.

This test may only be the beginning. If successful, it opens the door to more robust landing protocols and could help pave the way for Mechazilla-assisted recoveries with reduced risk. It also increases trust in Starship’s ability to carry out high-stakes missions, whether it’s satellite deployment, lunar cargo delivery, or eventually crewed flights to Mars.

SpaceX’s Rapid Development and Flight Cadence: The Road Ahead

Preparations for SpaceX’s upcoming Starship missions are showing no signs of slowing down. While all eyes are on Flight 9 and the critical testing it will carry out with B14 and S35, the groundwork for subsequent flights is already in motion. This indicates just how aggressive SpaceX’s development cadence has become.

The Surprising Movement of Booster 17

One of the most surprising developments has been the recent movement of Booster 17. Initially, it was assumed that the scheduled road closure on April 8th would be for S35. However, SpaceX had other plans. On the morning of the 7th, the booster transport stand was spotted moving from the launch site to the production site. By the afternoon, it had rolled into Mega Bay 1, where it was quickly paired with B7. The very next day, B7 was transported to Massey’s test facility.

What made this event even more noteworthy was the speed with which testing began. On the same afternoon that B7 arrived at Massey, a cryogenic test was carried out. The vehicle’s tanks were loaded with liquid nitrogen to simulate fuel loading and check the structural integrity of the booster under cryogenic conditions. From all indications, the test proceeded smoothly, and this likely won’t be the only test B7 undergoes.

SpaceX’s Aggressive Testing Strategy

The rapid pace of B7’s development highlights SpaceX’s broader strategy. The proximity of this test campaign to the recent testing of B16 and S35 signals that SpaceX is preparing to dramatically increase its launch frequency, potentially initiating a period of rapid-fire flights if Flight 9 proves successful.

Booster 17 and Ship 37: Preparing for Flight 11

But B7 is only part of the story. Its mission partner, S37, is also moving swiftly through the assembly process. The aft section of the vehicle A3 to 4, which houses the critical aft flaps, was recently seen being delivered to Mega Bay 2, indicating that stacking operations are nearly complete. Once finished, S37 and B7 are expected to fly together on Flight 11, a mission rumored to involve the first full-scale attempt to catch a Superheavy booster using the Mechazilla arms.

Preparing for the Mechazilla Capture Attempt

Given the complexity of that operation, it’s no surprise that SpaceX is pushing forward with such urgency. Preparing these vehicles well in advance allows extra time for troubleshooting, modification, and integration testing, ensuring that everything is in peak condition when the time comes for the capture attempt.

What’s Next: The Future of SpaceX Starship

Meanwhile, yet another prototype is quietly entering the pipeline. A unique test tank aft section was recently moved into Mega Bay 1. This assembly features a ring structure topped by a fuel system, and it’s believed to be part of Booster 18, potentially the first prototype of the long-awaited Booster version 2.

If confirmed, this would represent a significant evolution in Starship’s design, likely including weight reductions, structural enhancements, and other optimizations meant to improve reusability and performance.

All of this points to a significant ramp-up in prototype readiness, just behind Flight 9. Should that mission meet its goals, it could unlock a new era for SpaceX’s Starship program, one defined by rapid launch cadence, increased testing complexity, and major advancements in orbital reusability.

The Upcoming NASA Developments: Private Crewed Missions

Let’s also explore NASA’s latest developments regarding private crewed missions to the International Space Station. On April 2nd, NASA officially released a solicitation for two additional private astronaut missions (PAMs), marking the fifth and sixth such missions to the ISS. These missions represent a vital step in NASA’s overarching plan to transition away from the government-led ISS and toward a future sustained by commercial space stations and operations.

NASA’s Crew Selection Criteria

One notable update in this solicitation is the expansion of eligibility for mission commander roles to non-NASA astronauts. This opens the door for commercial astronauts with spaceflight heritage to take on leading roles in these missions.

SpaceX Crew Dragon: The Future of Commercial Space Missions

NASA’s push to support private astronaut flights sets the stage for a vibrant and competitive LEO economy. As commercial space access continues to expand, SpaceX’s Crew Dragon remains the most reliable and flexible crew vehicle in operation. It is the likely transport solution for these missions, regardless of the winning provider.

FAQs

1. What is the significance of SpaceX’s decision to land Booster 14 with only two engines during Flight 9?

  • SpaceX’s decision to land Booster 14 with only two engines during Flight 9 is a critical test of the Starship’s resilience and adaptability. By simulating an engine failure scenario, SpaceX aims to prove that the vehicle can safely land with just two engines, even if one of the landing engines fails during descent.

2. Why is SpaceX forgoing Mechazilla-assisted landings for Flight 9?

  • For Flight 9, SpaceX has chosen to forgo a Mechazilla-assisted landing in favor of a splashdown in the ocean. This decision reflects a more cautious, data-focused approach and allows SpaceX to gather valuable data to refine the landing process before attempting more complex recovery methods.

3. What is the purpose of testing the “two-engine” landing scenario on Booster 14?

  • Testing the two-engine landing scenario is essential for contingency planning. If successful, it would prove that SpaceX can safely land the booster even in the event of an engine failure, reducing the risks associated with future missions and allowing for more robust recovery protocols.

4. How is SpaceX addressing the engine issues with Starship and Superheavy?

  • SpaceX is addressing engine issues with Starship and Superheavy by upgrading the ignition systems. These refinements are being tested and verified on both B14 (Booster 14) and S35 (Ship 35). Improvements to the igniter hardware are expected to reduce engine failure risks and improve overall mission reliability.

5. What is the significance of SpaceX’s fast-paced prototype development?

  • The rapid pace of prototype development highlights SpaceX’s ambitious goal of dramatically increasing its launch cadence. Prototypes such as Booster 17 and Ship 37 are undergoing rigorous testing, signaling that SpaceX is preparing for more frequent, complex launches, possibly leading to rapid-fire flights in the near future.

6. What role will Mechazilla play in future SpaceX Starship missions?

  • Mechazilla, SpaceX’s giant robotic tower, will play a key role in future Starship missions by catching the Superheavy boosters during landings. The development of the Mechazilla arms and tests like those planned for Flight 11 are crucial for advancing SpaceX’s landing capabilities and increasing reusability for Starship.

7. What is NASA’s role in the development of private crewed missions to the ISS?

  • NASA’s push to support private astronaut missions (PAMs) to the International Space Station (ISS) is part of its larger plan to commercialize low Earth orbit (LEO). By expanding eligibility for mission commanders and supporting private companies like Axiom Space, NASA is helping create a competitive LEO economy while reducing dependence on government-led space missions.

8. How does SpaceX’s Crew Dragon fit into NASA’s commercial space plans?

  • SpaceX’s Crew Dragon is the primary crew vehicle for NASA’s private astronaut missions to the ISS. With its reliability and flexibility, Crew Dragon is expected to remain the spacecraft of choice for these missions, supporting NASA’s transition toward commercial space stations and private spaceflight operations.

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