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RT Rick Joe: Time between milestones is also something to note (thread). SpaceX, as the pioneer, flew F9 1st in 2010, 1st retropropulsion in 2013, 1st…
RT Rick JoeTime between milestones is also something to note (thread).SpaceX, as the pioneer, flew F9 1st in 2010, 1st retropropulsion in 2013, 1st landing attempt early 2015, 1st successful landing late 2015.ZQ-3, CZ-12A and CZ-10B tried all on 1st flights; and 10B successful on all.1/Truthful🛰️: As he said, none of t