SpaceX is apparently aiming for a 1.4x safety factor: https://twitter.com/elonmusk/status/1215719463913345024 https://twitter.com/elonmusk/status/12157194639133

SpaceX is apparently aiming for a 1.4x safety factor: https://twitter.com/elonmusk/status/1215719463913345024 https://twitter.com/elonmusk/status/1215719463913345024 But my point here actually was the difference between "at least x times stronger than it needs to be", and "exactly x times stronger than it needs to be". Usually things are manufactured to the first spec, rockets are much closer to the latter spec because keeping weight down is so important. I suppose airplanes must also be closer to the latter spec than most things, but they should still be more forgiving than rockets.