Rocket Lab delays Neutron rocket debut to 2027 over manufacturing defect
The company pushed its next-generation partially reusable launcher from late 2026 into 2027 after discovering voids in carbon-fiber propellant domes.
What happened
Rocket Lab announced October 13 that it is delaying the maiden flight of its Neutron rocket to 2027, pushing back the previously targeted late 2026 debut. The delay stems from a manufacturing issue with carbon-fiber propellant domes in Neutron's first stage—specifically the caps for fuel tanks holding liquid oxygen and methane. Inspectors found voids within the carbon-fiber layers of a recently manufactured forward dome after curing. Rocket Lab's CEO Peter Beck stated that while the voids do not necessarily indicate flight failure, the company's standard requires appropriate safety margins. The company has implemented mitigations to the dome-manufacturing process, tested them on an aft dome with successful results, and expects to build and inspect a new forward dome by end of year, followed by first-stage assembly and testing through Q1 2027.
Context
Neutron represents a key strategic asset for Rocket Lab, which currently operates the smaller Electron launcher. The 42-meter-tall vehicle is designed with a reusable first stage to capture a larger share of the commercial launch market. Beck emphasized that customers have signed contracts for Neutron services and understand that reliability outweighs speed to debut. This is the latest in a series of delays since the project's 2021 announcement—initial targets of 2024, then 2025, then early 2026, and then late 2026 have all slipped, including a previous setback caused by a fuel tank rupture during pressure testing. The company's emphasis on proceeding only when safety margins are met frames the delays as deliberate quality decisions rather than technical failures.