Rocket Lab pushes Neutron debut to 2027 after carbon composite defects

Key points

• Rocket Lab announced on October 14, 2026, that the Neutron rocket's first flight will not occur until 2027.
• The delay is caused by voids discovered in the carbon composite propellant domes of the first stage.
• These defects resulted from design changes made to strengthen the rocket after a previous tank rupture in January 2026.
• Rocket Lab has since resolved the manufacturing issue, with an aft dome passing inspection using the updated process.
• The stock dropped approximately 6.6% to $55.25 following the announcement, though some reports noted a larger initial drop.

Background

Rocket Lab originally targeted a 2024 debut for Neutron, but the timeline has now doubled. The company previously faced a tank rupture in January 2026, which led to design modifications. Neutron is designed to compete with SpaceX's Falcon 9, which is being phased out in favor of Starship. The delay complicates Rocket Lab's strategy to capture market share from satellite operators and integrate its pending acquisition of Iridium Communications.

How outlets are covering it

Ars Technica provides detailed technical insights, noting that the voids were caused by thicker sections of carbon composite added to strengthen the structure after a previous failure. They emphasize that Rocket Lab has resolved the issue and is confident in moving forward. Yahoo Finance highlights the financial impact, reporting a 6.6% drop in stock price, while other sources like our archive noted a larger initial drop of 10.71%. SpaceNews confirms the delay but offers limited detail due to paywall restrictions. All sources agree on the 2027 timeline and the root cause being carbon composite manufacturing issues.

Why it matters

The delay affects Rocket Lab's ability to compete with SpaceX for medium-lift launch contracts, especially as SpaceX phases out Falcon 9. It also raises concerns about the company's ability to integrate its pending acquisition of Iridium Communications on schedule. The setback highlights the challenges of scaling up carbon composite manufacturing for large rocket structures.

What to watch

Rocket Lab will proceed with manufacturing a new forward dome using the updated process. The company will continue qualification testing for the first stage and Archimedes engine. Launch campaigns will begin once all tests are complete, with the first flight expected in 2027.