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by kayodelycaon 1544 days ago
Ejection seats are likely to cause spinal fractures (20~30% by one study) and broken legs (no numbers). Tests on the F-35 showed lighter pilots could have their necks broken by the heavier helmet, so they had to add a switch that will slow down the ejection sequence.

https://www.popsci.com/what-aircraft-ejection-is-like/