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Survival of High-velocity Free-falls in Water

Richard G. Snyder

出版	Federal Aviation Agency, Office of Aviation Medicine, 1965
URL	http://books.google.com.hk/books?id=OKv6TYTbQnMC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

Forty-four cases of free-falls survived by individuals impacting water environments under conditions of high velocity (50 to 116 ft/sec, corrected for aerodynamic drag) have been intensively investigated and analyzed. Ages varied from 7 to 80 years and the study included 34 males and 10 females. The falls occurred in 17 states, mainly over a 3-year period, and included all known survivals of water impact at over 50 ft/sec. It was found that the most survivable body orientation, by a factor of five to seven, is a feet-first impact in which critical velocity for human survival was approximately 100 ft/ sec No correlation of velocity with degree of injury was found, although distinct patterns of injury were shown. Factors believed to influence human survival tolerances are discussed.