Yesterday, a team of CNES, ESA, Arianespace and ArianeGroup personnel at Europe’s Spaceport in Kourou, French Guiana, completed a full-scale wet rehearsal of the new Ariane 6 rocket that was fueled and then drained of its fuel. The test lasted over 30 hours with three teams working in shifts of 10 hours each.
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Source: Phys.org