Vulcain® 2.1 is a version of the Ariane 5 Vulcain® 2 engine specially adapted for the Ariane 6 main stage to simplify production and reduce costs. Starting from a piece that has gone through their knight's vigil by improving it is also a way of ensuring this engine that shone brightly in its myriad tests of qualification is reliable in the future. How would you explain to a newbie how a rocket engine works? (we will perhaps relay the most creative ones) #ArianeGroup #Ariane6 CNES ESA - European