SpaceX abruptly halted its second attempt to launch the upgraded Starship V3 rocket on July 16 after four of the booster's engines failed to ignite at the critical moment. The abort occurred just as the engines were firing on the launchpad at the company's South Texas facility, forcing engineers to drain propellant from both the booster and upper stage to investigate what went wrong. The setback marks another stumble for SpaceX's ambitious third-generation Starship system, which the company is counting on to prove that orbital data centers are both technologically and economically viable.

CEO Elon Musk announced on his social media platform X that "some of the engines didn't start, triggering an automatic launch abort" and that the company would replace two of them before attempting another launch. SpaceX did not attempt to fly again until the following week, according to Musk's statement.

Elon Musk

Why Does This Matter for SpaceX's Public Company Status?

The timing of this failure carries particular weight because it occurred just over a month after SpaceX went public on June 12 in the largest initial public offering in history, raising more than $85 billion. The company's stock briefly touched valuations comparable to Amazon and Microsoft, but has steadily declined since then. On the day of the aborted launch, SpaceX's stock closed below its $135 IPO price, and sank more than 4% in after-hours trading following the abort announcement.

This second launch attempt represented SpaceX's first Starship test flight since becoming a public company, adding scrutiny to the program's execution. The company was attempting to deploy its first third-generation Starlink satellites into space, though they were designed to burn up around 20 minutes after deployment since Starship has not yet demonstrated the ability to reach Earth orbit.

What Happened During the First V3 Launch in May?

The July abort came just weeks after SpaceX's inaugural Starship V3 launch in May, which delivered mixed results. The company successfully got the upgraded rocket off the launchpad and deployed multiple Starlink simulator satellites into space, a significant milestone for the new system. However, the Super Heavy booster stage experienced a failure before it could attempt a simulated landing in the Gulf of Mexico, triggering an FAA-ordered review of the malfunction.

The upper stage also lost an engine during its journey to deploy the Starlink simulators, though it managed to complete its own simulated landing over the water without incident. The FAA cleared SpaceX to fly Starship again earlier in the week of the July 16 abort after identifying the causes of the booster failure and implementing fixes.

How to Understand SpaceX's Engine Challenges

• Engine Ignition Failures: The July 16 abort showed that four of SpaceX's new Raptor engines did not fire when they were supposed to ignite, a critical issue that forced an immediate shutdown of the launch sequence.
• Automatic Safety Systems: SpaceX's launch control systems detected the engine failures and automatically triggered an abort, preventing a potentially catastrophic launch attempt with insufficient thrust.
• Rapid Turnaround Requirements: The company had to remove all propellant from both the Super Heavy booster and upper stage before engineers could begin diagnosing the root cause of the engine malfunction.

The countdown to launch on July 16 had proceeded smoothly, with only a brief hold at T-minus one minute before the scheduled liftoff. That hold cleared quickly, and the countdown resumed normally. As the countdown expired, the launchpad's water deluge system activated, and the booster stage visibly began firing its engines. Then, suddenly, everything shut down. Graphics on SpaceX's broadcast appeared to show that four of the company's new Raptor engines did not fire upon ignition.

"Some of the engines didn't start, triggering an automatic launch abort," said Elon Musk.

Elon Musk, CEO at SpaceX

Starlink represents SpaceX's largest revenue generator and the only currently profitable portion of the company's business. The upgraded Starship and next-generation Starlink satellites are central to SpaceX's strategy to demonstrate that the concept of orbital data centers is both technologically and economically viable. Engine reliability is therefore critical to the company's ability to execute this vision and justify its public market valuation.

The engine troubles underscore the technical challenges SpaceX faces in scaling up the Starship program. While the company has demonstrated impressive progress in rocket development and reusability, achieving consistent, reliable performance across all systems remains an ongoing engineering challenge. The July abort, combined with the May mission's booster failure, suggests that SpaceX still has significant work ahead before Starship can reliably support the company's most ambitious plans.