Cover: Considerations of Applying Continuous Thrust During Synergetic Plane Changing.

Considerations of Applying Continuous Thrust During Synergetic Plane Changing.

Published 1967

by Frederic S. Nyland

Purchase Print Copy

 Format Price
Add to Cart Paperback43 pages $23.00

An investigation of the interactions of thrust and lift on equilibrium reentry trajectories to determine if the use of thrust during a turn will reduce the heat input to a winged spacecraft. In the maneuver considered in this study, propulsion is used shortly after the vehicle enters the atmosphere to cancel drag and provide additional lift, so that much of the heading change will occur during the cruise phase at constant vehicle velocity. Engine thrust is increased at the end of cruise to accelerate the vehicle into a new orbit, thus decreasing heating rates and vehicle temperatures. A variable-thrust engine is assumed. The study shows that by using propulsion during the turning phase of flight, the structural temperatures of lifting vehicles can be lowered by about 500 degrees F, compared with the temperatures encountered when the turn is made during a pure glide phase. If the turn is made at high velocity, fuel loss is minimized by using very large bank angles. No losses in vehicle performance were noted, and normal load factors were decreased. 43 pp. Ref.

This report is part of the RAND research memorandum series. The Research Memorandum was a product of RAND from 1948 to 1973 that represented working papers meant to report current results of RAND research to appropriate audiences.

This document and trademark(s) contained herein are protected by law. This representation of RAND intellectual property is provided for noncommercial use only. Unauthorized posting of this publication online is prohibited; linking directly to this product page is encouraged. Permission is required from RAND to reproduce, or reuse in another form, any of its research documents for commercial purposes. For information on reprint and reuse permissions, please visit

RAND is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.