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Rocket Lab Completes Archimedes Engine Build, Begins Engine Test Campaign

The new 3D printed, reusable rocket engine for Rocket Lab’s Neutron launch vehicle begins an intensive test campaign at NASA’s Stennis Space Center in Mississippi in preparation for Neutron’s first launch

Rocket Lab USA, Inc. (Nasdaq: RKLB) (“Rocket Lab” or “the Company”), a global leader in launch services and space systems, today announced it has completed the first full assembly of its Archimedes engine, the new 3D printed, reusable, rocket engine for the Company’s Neutron medium lift launch vehicle. Rocket Lab has now begun an intensive test campaign that will feature a number of engine system activations leading up to a first Archimedes hot-fire.

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20240506111202/en/

Rocket Lab's reusable Archimedes engine for its Neutron launch vehicle. (Photo: Business Wire)

Rocket Lab's reusable Archimedes engine for its Neutron launch vehicle. (Photo: Business Wire)

The Archimedes test campaign will take place at Rocket Lab’s dedicated engine test stand at America’s largest rocket propulsion test site, NASA’s Stennis Space Center in Mississippi. As an oxidizer rich staged combustion cycle powered by liquid oxygen and methane, Archimedes is a unique rocket engine of its thrust class, engine cycle, and propellant combination. The engine is designed for maximum reusability, with an operating point that allows the engine to operate at a lower stress levels comparative to other rocket engines on the market, and with a minimum reuse target of up to 20 launches per engine. At full power, each Archimedes engine is capable of producing 165,000 lbf (733 kilonewtons) for a combined total of 1,450,000 million lbf on Neutron’s first stage. Critical 3D printed parts to undergo testing include Archimedes’ turbo pump housings, pre-burner and main chamber components, valve housings, and engine structural components.

Many component, subsystem, and all-up system tests will be conducted throughout the test campaign. These tests will validate Archimedes’ transient start-up, steady-state, and shut down performance. The engine test and development campaign is a key driver of the schedule for Neutron’s first launch, which the Company today confirmed is now expected to take place no earlier than mid-2025.

“Having a completed Archimedes engine on the test stand is an inflection point in Neutron’s development program. Now we’ve entered the home stretch where we breathe fire and refine the engine in preparation for first flight,” said Rocket Lab founder and CEO, Peter Beck. “Often with engine development plans there can be a rush to get a minimum viable product to the stand, after which you have to spend years in redesign and iterative testing to get the performance you need, let alone being able to reproduce it reliably on a large production scale. What we’ve taken to the test stand is very close to a flight-like engine, and with all of our production infrastructure stood up alongside the engine’s development, we’re in a prime position to be able to make quick iterations to Archimedes for a rapid development and qualification campaign. We took the time to not only bring a mature design to the stand that has been thoroughly tested at component level, but to also stand up the experienced team, manufacturing line, and test facilities required to support long term production of Archimedes. This approach has ultimately pushed the first flight to mid-2025 at the earliest, but it’s an approach we believe will deliver the frequent flight rates the market needs quickly after flight one. Designing a brand-new rocket engine to meet the market demand for frequent and reliable launch is complex feat, but it’s something we’ve successfully done before, having launched more than 470 Rutherford engines to space. We look forward to repeating this success with Archimedes.”

Production of subsequent Archimedes engines is continuing in parallel with the ongoing test campaign, with long-lead 3D printed components already manufactured and undergoing checkouts and analysis ahead of integration and engine full assembly at Rocket Lab’s Engine Development Complex in Long Beach, California.

Additional recent milestones on the path to first Neutron launch include the completion of carbon composite flight structures for Neutron’s fairing panels, Stage 1 and Stage 2 tanks, and the reusable Stage 1 structure. Infrastructure development is also continuing at pace across Neutron’s dedicated launch site at Wallops Island, Virginia, with completed foundation concrete works for Neutron’s launch mount and propellant and gas storage facilities, and installation of the site’s 278 ft water tower.

About the Archimedes engine

Archimedes is the 3D printed, reusable rocket engine designed and manufactured by Rocket Lab to power the Company’s new Neutron rocket. Capable of lifting up to 13,000kg, Archimedes is an oxygen-rich staged combustion engine powered by liquid oxygen and methane that is designed for rapid reusability. Neutron will include nine Archimedes engines on its reusable first stage for a total combined thrust of 1,450,000 lbf. The single vacuum-optimized version of Archimedes on Neutron’s second stage shares all major components with the first stage engine and is capable of up to 202,300 lbf (900kN). Both versions of Archimedes are designed for multiple restarts, with the vacuum Archimedes designed to start up to six times while in space to perform complex orbital maneuvers for payload delivery in multiple orbits or more complex orbits.

Archimedes is intentionally designed to operate within medium-range capability, a choice that lowers thermal and operational strains across the engine to improve its life and reliability, and meet the rapid reusability requirements of Neutron.

Full-rate production of the Archimedes engines will take place at Rocket Lab’s Engine Development Complex at its headquarters in Long Beach, California.

+ About Rocket Lab

Founded in 2006, Rocket Lab is an end-to-end space company with an established track record of mission success. We deliver reliable launch services, satellite manufacture, spacecraft components, and on-orbit management solutions that make it faster, easier, and more affordable to access space. Headquartered in Long Beach, California, Rocket Lab designs and manufactures the Electron small orbital launch vehicle, our family of spacecraft platforms, and the Company is developing the large Neutron launch vehicle for constellation deployment. Since its first orbital launch in January 2018, Rocket Lab’s Electron launch vehicle has become the second most frequently launched U.S. rocket annually and has delivered 180+ satellites to orbit for private and public sector organizations, enabling operations in national security, scientific research, space debris mitigation, Earth observation, climate monitoring, and communications. Rocket Lab spacecraft have been selected to support NASA missions to the Moon and Mars, as well as the first private commercial mission to Venus. Rocket Lab has three launch pads at two launch sites, including two launch pads at a private orbital launch site located in New Zealand and a third launch pad in Virginia. To learn more, visit www.rocketlabusa.com.

+ Forward Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. We intend such forward-looking statements to be covered by the safe harbor provisions for forward looking statements contained in Section 27A of the Securities Act of 1933, as amended (the “Securities Act”) and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements contained in this press release other than statements of historical fact, including, without limitation, statements regarding our launch and space systems operations, launch schedule and window, safe and repeatable access to space, Neutron development, operational expansion and business strategy are forward-looking statements. The words “believe,” “may,” “will,” “estimate,” “potential,” “continue,” “anticipate,” “intend,” “expect,” “strategy,” “future,” “could,” “would,” “project,” “plan,” “target,” and similar expressions are intended to identify forward-looking statements, though not all forward-looking statements use these words or expressions. These statements are neither promises nor guarantees, but involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements, including but not limited to the factors, risks and uncertainties included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, as such factors may be updated from time to time in our other filings with the Securities and Exchange Commission (the “SEC”), accessible on the SEC’s website at www.sec.gov and the Investor Relations section of our website at www.rocketlabusa.com, which could cause our actual results to differ materially from those indicated by the forward-looking statements made in this press release. Any such forward-looking statements represent management’s estimates as of the date of this press release. While we may elect to update such forward-looking statements at some point in the future, we disclaim any obligation to do so, even if subsequent events cause our views to change.

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