Relationship between Local and Effective Aerodynamic Pitch-Damping Derivatives as Measured by a Forced-Oscillation Balance for Preliminary Viking Configurations
Final rept. 1 May-1 Nov 1971
ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFS TN
Pagination or Media Count:
Forced-oscillation pitch-damping balances oscillating over a small angular amplitude range about a nominal angle of attack yield an effective value of aerodynamic damping if the damping is a nonlinear function of angle of attack. Computer-simulated motion studies lead to developing a procedure to extract the local damping from the output of a forced-oscillation balance. A derivation is given of the basic integral equation relating local and effective damping. The method is applied to three preliminary unmanned Mars reentry Viking model configurations, and the results are discussed.
- Unmanned Spacecraft
- Spacecraft Trajectories and Reentry