 The Vinci offers the same specific impulse at the same mass but with 64% greater thrust, which would allow for a reduction of one or two of the four second stage engines for the same performance, while the cost would be lower., the first flight of the Ariane 6 rocket with Vinci is planned for 2020.In July 2017, Ariane Group reported that the first flight models of the combustion chamber had entered production.