We are #SpaceEnablers. We build the most reliable launch vehicles and we are developing Ariane 6. Get your space gear! 
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Is sound #1 a generator?
Not quite, but we saw that you faved the right answer, Xander. ;)
We try our best! 
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The sound is unforgettable, according to people who have experienced an Ariane 5 lifting off. But this week’s question should be really easy for experts like you! 