Accession Number : AD0686331

Title :   DIGITAL COMPUTER PROGRAMS FOR PLANE MOTIONS WITHIN AND WITHOUT PLANETARY ATMOSPHERES,

Corporate Author : POLYTECHNIC INST OF BROOKLYN N Y DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS

Personal Author(s) : Crisp,John D. C.

Report Date : NOV 1960

Pagination or Media Count : 43

Abstract : Programs are discussed for the numerical solution of the exact equations of plane motion of a small vehicle moving in a spherically symmetric gravitational force field and subject to atmospheric forces. The planet is considered fixed and nonrotating, and the atmosphere is regarded as nonrotating and uniformly symmetrical; its density is assumed to have an exponential variation with altitude. A basic program is defined for solutions with constant settings of lift and drag coefficients and there are described two versions of it, the one written for a Bendix G15 computer, the other for an I.B.M. 650 machine. The numerical technique of solution is based on the idea of the instantaneous conic. (Author)

Descriptors :   (*ORBITS, COMPUTER PROGRAMMING), LIFT, DRAG, ATMOSPHERE ENTRY

Subject Categories : Computer Programming and Software
      Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE