Determination of the T-38 Wind Tunnel Oscillatory Data of the Dynamic Calibration Missile Model

 

Zoran Anastasijević

Marija Samardžić

Dragan Marinkovski

Snežana Vrtlar

Milorad Rodić,

 

This paper presents determination of the required data for measurements of dynamic stability derivatives in the T-38 wind tunnel. The technique for measurements of stability derivatives applied in the T-38 wind tunnel is the forced oscillation technique. The data reduction procedures used in the VTI to obtain both direct and cross and cross-coupling derivatives are described. The determination of the primary motion amplitude and frequency is also described as well as the determination of the amplitude of the excitation moment signal and the phase shift between the reference signal and the excitation moment signal. The T-38 test results of roll-damping and pitch-damping measurements for Mach number M=0.6 and M=1.75 are compared with experimental data from the AEDC wind tunnel. Analysis of wind tunnel oscillatory data was done for the Modified Basic Finner Model.

Key words: experimental aerodynamics, wind tunnel, stability derivatives, forced oscillation, internal balance.