抄録
Micro-laboratory reentry system (μ-LRS) is a micro-size space-experiment system which is able to be retrieved on the sea after the atmospheric reentry. In order to investigate the dynamic characteristics of the reentry capsule in the transonic flight both the wind-tunnel tests and the balloon-drop test were carried out. In the wind-tunnel tests the shift of center of gravity position off the symmetry axis suppressed the oscillation amplitude which was caused by the dynamic instability. In the balloon-drop test the flight Mach number of the capsule reached to 1.094. During the transonic flight the oscillation with the amplitude of eight degrees in pitch angle were measured.
