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A comment on Pattern of Brain Damage Is Pervasive in Navy SEALs Who Died by Suicide. Parent comment

Re:Pattern of Brain Damage Is Pervasive in Navy SEALs Who Di... by alexey-salmin on Tuesday July 02, 2024 @04:15AM (#40854576)
Older steel helmets don't but modern IIIA-class helmets (e.g. ECH) do.

Kinetic energy is not a unsolvable problem, energy can be dissipated. The impulse is in fact the problem that can't be really worked-around (except spreading it over longer period of time) but the impulse of a bullet is low.

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Re:Pattern of Brain Damage Is Pervasive in Navy SEALs Who Di... by sobriquet9 on Tuesday July 02, 2024 @01:22PM (#40858694)
Level IIIA resists penetration from .357 SIG, 9 mm, and .44 magnum. Those are handgun rounds. It may stop some intermediate rounds if you’re lucky, but certainly not full power rifle rounds.

Helmets cannot deform as much as vests before seriously injuring the wearer, limiting their capacity to dissipate kinetic energy. And if you make them too rigid, concussion becomes a problem.

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