Dynamic Stability And Control Problems Of Piloted Reentry From Lunar Missions

Download or read book Dynamic Stability and Control Problems of Piloted Reentry from Lunar Missions written by Martin T. Moul and published by . This book was released on 1961 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fixed-base simulator investigation was made of stability and control problems during piloted reentry from lunar missions. Reentries were made within constraints of acceleration and skipping, in which the pilot was given simulated navigation tasks of altitude and heading angle commands. Vehicles included a blunt-face, highdrag capsule, and a low-drag lifting cone. Each had a trim lift-drag ratio of 0.5. With the provision of three-axis automatic damping, both vehicles were easily controlled through reentry after a brief pilot-training period. With all dampers out, safe reentries could be made and both vehicles were rated satisfactory for emergency operation. In damper-failure conditions resulting in inadequate Dutch roll damping, the lifting-cone vehicle exhibited control problems due to excessive dihedral effect and oscillatory acceleration effects. (Author).