The first stage features a Vulcain 2.1 motor — an improved version of the Vulcain 2 engine that flew on Ariane 5. The second stage on the other hand has a newly-designed Vinci engine ...

Five tests at different acoustic levels confirmed the upper stage is ready for a launch on Ariane 6 with four boosters. The tests were carried out by ArianeGroup teams at ESTEC—ESA's European ...