Accession Number : AD0664027

Title :   VERTICAL RE-ENTRY OF VERY LIGHT-WEIGHT BODIES INTO THE EARTH'S ATMOSPHERE.

Descriptive Note : Research note,

Corporate Author : GENERAL DYNAMICS/CONVAIR SAN DIEGO CALIF

Personal Author(s) : Linnell,R. D.

Report Date : OCT 1967

Pagination or Media Count : 31

Abstract : The vertical re-entry of very light-weight bodies into the earth's atmosphere is studied. Rough approximations, an analytical method, and numerical integration are used to determine the velocity. It is found that below about 200,000 feet altitude the velocity is proportional to the sq. root of W/C(sub D)A when W/C(sub D)A is of the order of .10. The maximum deceleration increases linearly with increasing release altitude and it occurs at altitudes around 250,000 feet. Appreciable decelerations occur even for release altitudes of the order of 1,000,000 feet. It is found that the temperature of the thin external surfaces of light-weight bodies increases rapidly when the release altitude is increased. Extra material may be required locally in the detailed design, in order to reduce the surface temperature. (Author)

Descriptors :   (*DATA STORAGE SYSTEMS, ATMOSPHERE ENTRY), (*ATMOSPHERE ENTRY, DESCENT TRAJECTORIES), SOUNDING ROCKETS, EXPERIMENTAL DATA, HIGH ALTITUDE, GRAVITY, EQUATIONS OF MOTION, DRAG, BUOYANCY, APOGEE, DECELERATION, AERODYNAMIC HEATING, HEAT TRANSFER, ACCELERATION

Subject Categories : Atmospheric Physics
      Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE