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Phoebus: keeping the smallest molecule in the Universe contained


In brief - Progress is being made on the Phoebus project’s carbon fibre hydrogen tanks for a potential future application on Ariane 6 and spin-off industrial applications - Smaller scale models have proven this world-first technology is possible - A 2600-l carbon-fibre reinforced plastic hydrogen tank is now in the final stages of production - A new test facility in Trauen, Gemany, passed a preliminary design review in June and is being prepared for testing with hydrogen from April 2026 In-depth Phoebus is a European Space Agency (ESA) project together with ArianeGroup and MT Aerospace. It aims to assess the feasibility and benefits of replacing the metallic tanks on ESA’s Ariane 6 upper stage with carbon-fibre reinforced-plastic tanks.

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