Reclined Seat Impact Attenuation Record

PROBLEM: The picture's occupant lies reclined — and that is exactly how Orion flies its crew: lying on their backs with knees bent at 90 degrees, held by a 5-point harness, concave headrest and shoulder and hip bolsters, with a crew impact attenuation system that slides the seat up to six inches on rails to absorb landing loads. NASA's crashworthy-seat research adds a parabolic seat pan that fits the occupant's body nearly conformally. But an attenuation system that has never been logged against a real landing load is a design claim, not a safety record.

SOLUTION: A reclined seat impact attenuation record: every seat logged with its attenuation travel, its load history, and its post-landing inspection result — so a reclined crew seat's protection is proven by its record, not by its shape.

EVIDENCE BASIS: DOCUMENTED — Orion crew seats (NASA): four seats, 1st to 99th percentile of body size (4 ft 10 in, 94 lb to 6 ft 5 in, 243 lb); launch/re-entry position lying on backs, knees bent 90°, feet on foot pans; 5-point harness, concave headrest, shoulder and hip bolsters, foot-pan peg locking into crew boots; crew impact attenuation system slides the seat up to six inches on rails. NASA crashworthy-seat study (NTRS 20090020569): recumbent quasi-fetal posture, parabolic hip-support path and seat pan. Sources: NASA "Crew Systems"; NASA NTRS.