Self-excited and quasi-self-excited pitch-angle oscillations in a flow past a conical-spherical body at Mach number M = 1.75

A study on transition processes for experimental time dependencies of the pitch angle for a case of free rotation of a body discovered the final intervals with a steady amplitude of oscillations — known as quasi-self-excited oscillations. Statistical analysis demonstrated that the maximum possible difference between the amplitudes of self-excited oscillations (including the case of quasi-self-excited oscillations) at the normalized oscillation frequency of 0.02 was about 1 degree.