Accession Number : AD0428614

Title :   AN INVESTIGATION OF THE ABRUPT ACCELERATION PROPERTIES OF THE PROTOTYPE NET CREW SUPPORTRESTRAINT SYSTEM,

Corporate Author : RESEARCH AND TECHNOLOGY DIV BOLLING AFB D C

Personal Author(s) : Peterson,Richard L.

Report Date : OCT 1963

Pagination or Media Count : 28

Abstract : Abrupt acceleration characteristics were evaluated for the net seat concept during ground impact. Two series of abrupt acceleration experiments are described: the first series included evaluation of the prototype net crew seat utilizing fully-instrumented and articulated an thropomorphic dummies and the second series included both fully-instrumented dummies and human volunteer test subjects. Acceleration time history oscillograph traces are included for both series of experiments and contain acceleration forces in g units versus time in seconds for the head, chest, and knee, and for the center of gravity and head area of the impact test vehicle. The net crew seat prototypes were evaluated only for unidirectional impact accelerations involving velocity changes which are lower than those encountered in operational systems during ground landing impact. During the human abrupt acceleration experiments conducted at an impact velocity of 15 ft/sec, a peak of 35.5g was recorded on the chest. No injuries resulted during this series of human abrupt acceleration experiments. Analysis of the oscillograph traces and 16 mm movie data revealed a major problem area, seat occupant oscillation (rebound) during ground impact; several solutions for the elimination of this problem are discussed. (Author)

Descriptors :   (*AIRCRAFT SEATS, IMPACT SHOCK), (*AVIATION SAFETY, AIRCRAFT SEATS), ACCELERATION TOLERANCE, DECELERATION, INSTRUMENTATION, AEROSPACE CRAFT, SPACECRAFT SEATS

Distribution Statement : APPROVED FOR PUBLIC RELEASE