Rocket Lab pushes Neutron launch to 2027 after carbon‑composite tank defect

Rocket Lab announced that the first flight of its medium‑lift Neutron rocket will not occur until 2027. The delay was caused by air‑pocket voids discovered in the carbon‑composite forward dome of the first‑stage propellant tank, prompting a redesign and new manufacturing process. CEO Peter Beck said the company is building a replacement dome and will complete inspections and tests before the first quarter of 2027. The news sent the company’s shares sharply lower in after‑hours trading.

The postponement pushes back any revenue Rocket Lab could earn from medium‑lift commercial and government launches until at least 2027, extending the competitive gap with SpaceX’s Falcon 9. Investors should expect a near‑term impact on the company’s cash flow and market valuation.

  • 1Neutron’s first launch is now expected in 2027, after previously targeting the fourth quarter of 2026.
  • 2The delay was traced to air‑pocket voids in the carbon‑composite forward dome of the first‑stage propellant tank.
  • 3Rocket Lab is building a replacement forward dome on its automated fiber‑placement machine and will inspect it with ultrasonic testing before integrating it into the rocket.
  • 4CEO Peter Beck said the company will finish the first two manufacturing steps before the first quarter of 2027 and complete the final integration during that quarter.
  • 5Shares fell roughly 6% to 8% in after‑hours trading following the announcement.
  • Material 1 reports a share decline of roughly 6%‑8%, while material 4 says the stock fell 11% and was down 9% to $53.86, creating a conflict on the exact magnitude of the price drop.

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