Ariane 6 maiden flight restores European launch capability

At four o'clock on the afternoon of 9 July 2024, the jungle clearing at Europe's Spaceport in French Guiana shook as a brand-new rocket left the ELA-4 pad for the first time. For the engineers watching in Kourou and across Europe, the tension was about more than a maiden flight. Since Ariane 5's final launch on 5 July 2023, the continent had possessed no rocket of its own for its flagship missions. Europe, a space power for half a century, had spent a year buying rides, including on its chief competitor's Falcon 9, for missions like Euclid and its own Galileo navigation satellites.

Ariane 6 had been a decade and roughly four billion euros in the making, the first all-new Ariane since Ariane 5 debuted in 1996. The maiden vehicle flew in its two-booster Ariane 62 configuration, 56 meters tall, with a Vulcain 2.1 engine on the core and the new restartable cryogenic Vinci engine on the upper stage. Liftoff came an hour into the four-hour window after a minor data acquisition issue. The climb was flawless, and one hour in, the Vinci reignited as designed and the stage released its passengers, eight cubesats from universities, startups and agencies, into a 600-kilometer orbit.

The flight's final act fell short. The upper stage's auxiliary power unit shut down after exceeding temperature limits, preventing the third Vinci burn that would have demonstrated a controlled deorbit and released two experimental reentry capsules, which stayed attached to the stranded stage. But the primary objectives stood: Ariane 6 had reached orbit and delivered payloads on its first attempt, something far from guaranteed for new heavy rockets. ESA Director General Josef Aschbacher called it a historic day for Europe, and the program moved toward its first commercial flight, which followed in March 2025 with the French CSO-3 reconnaissance satellite.