https://rocketlabcorp.com/updates/rocke ... st-update/
Long Beach, Calif. January 21, 2026:
Rocket Lab Corporation (Nasdaq: RKLB) (“Rocket Lab” or “the Company”), a global leader in launch services and space systems, today announced an update relating to the development of its Neutron rocket.
As the Company pushes Neutron to the limits and beyond to qualify its systems and structures for launch, qualification testing of the Stage 1 tank overnight resulted in a rupture during a hydrostatic pressure trial. Testing failures are not uncommon during qualification testing. We intentionally test structures to their limits to validate structural integrity and safety margins to ensure the robust requirements for a successful launch can be comfortably met.
There was no significant damage to the test structure or facilities, the next Stage 1 tank is already in production, and Neutron’s development campaign continues while the team assesses today’s test outcome.
The team is reviewing the Stage 1 test data, which will determine the extent of the impact to Neutron’s launch schedule. The Company intends to provide an update on the Neutron schedule during its 2025 Q4 earnings call in February.