This paper elaborates the overall design process and the sub-system details of the hybrid sounding rocket of "Beihang-2" ("BH-2"), highlighting the hybrid rocket motor system. The "BH-2" hybrid rocket is designed and fabricated by 15 undergraduates (graduated on September 2007) from School of Astronautics at Beihang University (BUAA). The major objectives of the rocket are evaluation the hybrid rocket motor technology as well as measurement and store the parameters of the stratosphere. The rocket system is composed of five subsystems: structural subsystem, propulsion subsystem, separating-recovery subsystem, control and payload subsystem and launching subsystem Through the efforts for 2 years, the team of "BH-2" has finished the investigation, design, test, debugging and final assembly of all the five subsystems. The "BH-2" hybrid rocket is successfully launched at Chinese Jiuquan Satellite Launch Center on Dec.5th, 2008. Every subsystem is validated during the flight test and the "BH-2" hybrid rocket performed successfully in ignition, launch, separation and landing.
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