Neutron's First Flight Delayed to 2027 Due to Production Issues

On October 14th, Rocket Lab's Peter Beck, Chief Executive Officer and Founder, led a short video to announce that the first flight of the company's partially reusable Neutron launch vehicle is now delayed into 2027.

Reasons cited for the delay were issues found in the production process for the first-stage propellant tank sections, which had changes made after a failed test back in January. The issues found were said to be material voids inside the tanks' domes between layers of carbon fiber material. Those would reduce structural strength and could potentially fail during flight.

According to Peter Beck, that issue has now been resolved by modifying how the domes were made following a lengthy investigation. It was not stated how much time Rocket Lab took from finding the problem to fixing it, but it was enough to push Neutron's first flight out of the last two and a half months of this year.

At present, Rocket Lab is manufacturing all parts of Neutron's first-stage propellant tank, with inspections planned once they're completed. Should those parts pass inspection, they will be joined together and sent out for hydrostatic testing, being loaded with water to confirm designed strength and pressure limits.

After hydrostatic testing, the first-stage will move on to cryogenic qualification testing. Meanwhile, Neutron's second-stage has already passed almost all of its tests, except for a static fire, some time ago in the first half of 2025.

Speaking on why Rocket Lab would rather delay over flying as soon as they can, Peter Beck said:

"Customers understand that a reliable rocket is far more valuable than an early one. [...] We believe Neutron is going to be a game-changer, and taking time to solve these challenges means we're in a better position to deliver a rocket that's ready to meet the needs of the industry for years to come.'

Relatedly, hardware for the second and third Neutron missions, without saying what parts those were, were stated to be in production. It's known that at least one flight's worth of hardware won't be brought back to prove the launch vehicle's ability to reach orbit and recover the first-stage.

While the first-stage propellant tanks are a key part of Neutron that needs to be qualified for flight, other components aren't ready either. As of October 15th, Rocket Lab's own tracker for Neutron milestones details that the Archimedes engines to power the vehicle are yet to be qualified for flight, mechanical components are yet to complete testing, and regulatory approval hasn't been granted.

Since January, the captive fairing section of Neutron has been at the company's launch facilities on Wallops Island, Virginia, ahead of integration and testing with the rest of the vehicle. Launch Complex 3 within the Mid-Atlantic Regional Spaceport has also been 'open' for over a year.

While Neutron is yet to fly, customers are buying dedicated flights of the vehicle. A confidential client bought a handful of launches in May, while Kepler Communications Inc secured a mission to fly in 2028. Those are alongside orders from the United States government.