ArianeGroup's GRETA peroxide–ethanol engine completes hot‑fire campaign and wins ESA backing
ArianeGroup’s GRETA, a 5 kN peroxide‑and‑ethanol rocket engine aimed at lunar landers and Ariane 6 auxiliary/upper stages, completed a comprehensive hot‑fire campaign in Trauen demonstrating stable operation, controlled shutdowns and multiple restarts and has secured a new ESA contract to advance development.