Rocket Lab’s Neutron second stage and thrust module have arrived at Launch Complex 3 on Wallops Island, Virginia, bringing two major assemblies to the site for work with launch infrastructure. The company announced the arrival on October 30, 2026, following their transport from the Neutron factory.
According to reporting on the transfer, the hardware left the factory by barge on October 26 and was unloaded at Wallops on October 28. Its subsequent movement to the launch complex placed the assemblies at the facility where interface checks and fluids testing are planned.
The two assemblies have different functions in the test campaign. The thrust module connects with the launch mount, making that interface a focus of ground checks. The second stage is scheduled for work on a nearby test stand, including fluids testing and installation of its vacuum-optimized Archimedes engine.
Connecting Vehicle Hardware With Ground Systems
Launch equipment and rocket hardware operate together during preparation for flight. The planned interface checks examine how the thrust module fits and works with the launch mount. Integrated fluids testing exercises the connections and systems used to handle fluids between ground equipment and the vehicle.
Neutron’s second stage will perform the later portion of powered ascent. Rocket Lab’s vehicle description specifies an Archimedes engine variant adapted for operation in space, with an extended nozzle compared with the first-stage version.
The rocket uses liquid oxygen and methane. Its first stage is designed around nine Archimedes engines, and the company lists a design payload capability of 13,000 kilograms to low Earth orbit. Neutron stands approximately 43 meters tall.
Rocket Lab’s recovery design retains the payload fairing on the first stage. The fairing opens to release the second stage, then closes before the returning first stage reenters the atmosphere. The company plans offshore booster landings on its Return On Investment platform.
Work Toward the Planned First Flight
The launch-site transfer follows Rocket Lab’s October schedule revision, which moved Neutron’s expected first flight into 2027. The company attributed the change to continuing development and manufacturing process improvements.
The revision involved the first-stage propellant tank. Inspections identified voids in a carbon-composite forward dome, prompting changes to the manufacturing process and replacement work. A dome forms an end of the tank, which holds the engine propellants under pressure.
With the second stage and thrust module now at Launch Complex 3, the planned ground campaign brings those assemblies into contact with the equipment that will support Neutron’s launch operations. The immediate work centers on launch-mount interfaces, the second-stage test stand, and integrated fluids testing.
