Accession Number:

AD0608316

Title:

AN ANALYSIS OF THE ROTATIONAL MOTION OF A BODY DURING RE-ENTRY

Descriptive Note:

Revised ed.

Corporate Author:

RAND CORP SANTA MONICA CA

Personal Author(s):

Report Date:

1961-06-28

Pagination or Media Count:

61.0

Abstract:

The dynamical equations of motion are formulated for a body during re-entry into the atmosphere. With the assumption that the translational and rotational degrees of freedom may be treated independently, an analysis is undertaken of the oscillatory motion of a re-entry vehicle which is spinning about its longitudinal axis. The influence of the spin rate and the static margin upon the stability of the transient solution of the equations of motion is considered, and it is concluded that satisfactory dynamical behavior of the re-entry body may be anticipated if the static margin of the vehicle is less than zero, the spin rate is in the range 0.5 to 2 radians per second, and the lift curve has a slope equal to or greater than zero. An examination of the precessional and nutational motion of the vehicle is also made, and the effect of initial conditions upon these modes of oscillation is indicated.

Subject Categories:

  • Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE