Abstract: On March 29, 2022, the Long March 6A launch vehicle developed by the Shanghai Academy of Spaceflight Technology successfully made its maiden flight at the Taiyuan Satellite Launch Center. The Long March 6A launch vehicle was China’s first solid bundled rocket. It uses non-toxic and non-polluting propellants, and has a 700 km sun-synchronous orbit carrying capacity of no less than 4.5 t, which is more than 50% higher than that of a LM-4C launch vehicle. During the development of the LM-6A launch vehicle, the matching relationship between systems and the overall performance of the entire rocket improved significantly through continuous overall optimization work. This paper introduces the typical overall optimization work during the development of the LM-6A launch vehicle.

Key words: