First integration of European reusable stage demonstrator Themis
by Robert Schreiber
Berlin, Germany (SPX) Dec 18, 2024

ArianeGroup has successfully completed the initial mechanical integration of Themis, the European reusable launcher first stage demonstrator, at its Les Mureaux facility in France.

Standing 28 meters tall, the prototype comprises the Multi-Engine Bay (MEB), tanks, the Flight Control Bay (FCB), and the upper segment that completes the stage structure.

The Themis demonstrator will be powered by Prometheus, a new-generation, throttleable cryogenic engine also developed by ArianeGroup.

The successful integration test validated that all key components could be assembled as designed, marking a major milestone in the first development phase of the reusable stage. This achievement sets the stage for its shipment to the Esrange Space Centre in Sweden, where the first hop-test is scheduled for next year.

Once in Sweden, Themis will be paired with its landing legs, which have already been delivered. Concurrently, work on the launch pad is progressing to prepare for the upcoming test campaign.

As part of the European Union's SALTO programme, this initial flight will see the Themis stage perform a controlled low-altitude hop, where it will lift off and land at the same location.

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