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This paper describes results of the thermal-hydraulic performance experiment system (THYPES) of the two-phase flow loop thermal control system using the test rocket which can maintain a gravity level of 10-4G for about six minutes. Feasibility study of this system had been conducted for loading into a experiment module of test rocket TR-IA No. 3. In 1991, engineering model of the experiment system was designed and manufactured in order to investigate its function, performance, and endurance against launching conditions. In 1992, flight model of the experiment system was designed and manufactured. The following tests were conducted so as to ensure the capability and compatibility of THYPES; functional test, performance test, environmental test, and interface tests between the experiment system and rocket avionics section. The experiment was performed on September 17, 1993 and the results are evolved.

Antiglare rearview mirrors incorporating liquid crystal(LC) cells which vary the reflectance of the mirrors according to the applied voltage have been developed. Seven different modes of LC mirrors were studied for this purpose. For each mode, the equations of the maximum reflectance and the minimum are derived theoretically and calculated numerically. Based on these results, we obtain a possible variable range of the reflectance which is one of the important requirements. The best modes are selected among the seven modes after evaluations and comparisons on fundamental matters, such as composition for the LC mirror and quality of the image added to the variable range of the reflectance. Brief description on the developed LC mirrors is given finally.