--- title: "Rocket Lab Postpones First Neutron Rocket Launch to 2027 Due to Composite Tank Dome Defects" description: "Rocket Lab has postponed the first launch of the Neutron rocket from late 2026 to 2027 due to defects in the composite domes of the first-stage fuel tanks. The company is adjusting its manufacturing technology." date: 2026-10-17T11:35:21.440Z lang: en url: https://xab.info/en/posts/rocket-lab-neutron-postpones-first-launch-2027 tags: [rocket-lab, neutron, space-launch, carbon-composite, reusable-rocket] author: "Alexander Buran" publisher: "XAB.info" --- # Rocket Lab Postpones First Neutron Rocket Launch to 2027 Due to Composite Tank Dome Defects ![Rocket Lab black Neutron rocket in space flight with active engines](https://xab.info/media/2026/10/17/rocket-lab-neutron-pereenos-pervogo-zapuska-na-2027/rocket-lab-neutron-pereenos-pervogo-zapuska-na-2027-1.webp) ## Key Points - The first Neutron launch has been postponed from late 2026 to 2027. - The reason is voids between carbon fiber layers in the first-stage fuel tank domes. - The company has changed its manufacturing technology; a new forward dome is planned to be built by the end of 2026. - This is not the first delay: timelines have shifted from 2024, then 2025, early 2026, and late 2026. In October 2026, Rocket Lab announced the postponement of the maiden flight of its promising partially reusable Neutron rocket: instead of late 2026, the debut flight is now expected in 2027. The reason was an issue during the manufacturing stage of the first-stage composite fuel tank elements — specialists discovered defects in the carbon fiber layers and decided to adjust the technological process to ensure the required structural safety margin. ### What Exactly Went Wrong The problem concerns the dome-shaped tank elements designed to store liquid oxygen and liquid methane. These parts are made from carbon composite using an automated machine that lays down fibers with high speed and precision. After curing one of the recently manufactured domes, engineers discovered voids between the material layers. According to Rocket Lab founder and CEO Peter Beck, such defects do not necessarily lead to structural failure in flight, but the company is not willing to risk the rocket's reliability and preferred to pause at the inspection stage. ### How the Company is Fixing the Situation Following analysis and additional testing, Rocket Lab made changes to the manufacturing process of the composite elements. The new approach has already been applied in manufacturing the rear dome, the quality of which, according to Beck, turned out to be the highest in the entire history of working with such parts. Now the company faces the task of manufacturing a new forward dome, curing it, and checking its quality. These works are planned to be completed by the end of 2026, after which the finished element will be installed on the first stage of Neutron, which is awaiting a series of tests. If the schedule is met, all these works will conclude in the first quarter of 2027, and only then will the company announce the new launch date. ### Chronology of Delays Neutron, standing about 42 meters tall, was unveiled by Rocket Lab in 2021. Initially, the first launch was planned for 2024, then the timeline was postponed to 2025, further to early 2026, and to late 2026. The latest shift occurred after a fuel tank ruptured during a pressure test, and now the schedule has slipped due to manufacturing issues with composite elements. The company emphasizes that it prefers to spend extra time fixing problems rather than rushing the rocket's debut. ### Strategy and Demand for the Rocket Rocket Lab expects Neutron to become an important part of its business, enabling larger launches while retaining the reusability of the first stage. According to Beck, demand for the future rocket remains high, and potential customers understand that vehicle reliability is more important than an early entry into the market. Thus, the company positions the debut delay to 2027 not as a failure, but as a deliberate step in favor of long-term product reliability. ## Fact-Check & Sources - [42-метровую ракету Neutron должны были запустить в 2024 году, но запустят только в 2027 году — из-за дефекта в композитном куполе](https://www.ixbt.com/news/2026/10/16/42-metrovuiu-raketu-neutron-dolzny-byli-zapustit-v-2024-godu-no-zapustiat-tolko-v-2027-godu-iz-za-defekta-v-kompozitnom-kupole.html) - The primary source contains all key facts: postponement to 2027, defects in the carbon composite tank domes, statements by Peter Beck, the chronology of delays since 2024, and the tank rupture during pressure testing. ## FAQ ### Why did Rocket Lab postpone the first Neutron launch? The reason was defects in the composite domes of the first-stage fuel tanks: after curing one of the domes, voids were found between the carbon fiber layers. The company decided to adjust its manufacturing technology for the sake of reliability. ### When is the first Neutron launch expected now? The first launch has been postponed to 2027. Manufacturing of the new forward dome is planned to be completed by the end of 2026, with installation on the first stage and a series of tests in the first quarter of 2027, after which the company will announce the exact launch date. ### Is this the first delay for the Neutron launch? No. The rocket was unveiled in 2021, with the first launch originally planned for 2024, then postponed to 2025, early 2026, and late 2026. The latest shift is linked to composite element defects following a tank rupture during a pressure test.