Accession Number : AD0620021


Title :   SURVIVAL OF HIGH-VELOCITY FREE-FALLS IN WATER


Corporate Author : FEDERAL AVIATION ADMINISTRATION WASHINGTON DC OFFICE OF AVIATION MEDICINE


Personal Author(s) : Snyder, Richard G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/620021.pdf


Report Date : Apr 1965


Pagination or Media Count : 17


Abstract : 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.


Descriptors :   *WOUNDS AND INJURIES , *WATER ENTRY , VELOCITY , SURVIVAL(PERSONNEL) , DRAG , TOLERANCES(PHYSIOLOGY) , DECELERATION , SHOCK(PATHOLOGY) , AVIATION INJURIES , AVIATION MEDICINE , ASTRONAUTS


Subject Categories : Stress Physiology
      Escape, Rescue and Survival


Distribution Statement : APPROVED FOR PUBLIC RELEASE