Accession Number : ADA004791

Title :   A Study of Very High Altitude Maneuvers Using Aerodynamic Forces. Volume IV. Optimum Maneuvers of Hypervelocity Vehicles Using Thrust and/or Aerodynamic Force.

Descriptive Note : Final rept. 2 Jan 71-2 Jan 74,

Corporate Author : COLORADO UNIV BOULDER DEPT OF AEROSPACE ENGINEERING SCIENCES

Personal Author(s) : Busemann,Adolf ; Vinh,Nguyen X. ; Culp,Robert D.

Report Date : SEP 1974

Pagination or Media Count : 78

Abstract : A lifting, thrusting vehicle operating at orbital speeds about a spherical planet is considered. The general problem posed is that of moving the vehicle from a given set of initial conditions to a given set of terminal conditions while minimizing the characteristic velocity of the maneuver. The maneuver is accomplished by a combination of thrust and aerodynamic force. The first problem solved is transfer from an initial circular orbit to a final non-coplanar circular orbit. Pure thrusting maneuvers are compared with combined thrust-aerodynamic maneuvers, with the optimal solutions given in closed form.

Descriptors :   *Aerospace craft, *Aerodynamic forces, *Transfer trajectories, Circular orbits, Elliptical orbit trajectories, Atmosphere entry, Thrust, Optimization, Lifting bodies

Subject Categories : Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE