商业火箭迎关键验证窗口：发动机决定太空探索深度，3D打印则是降本核心

Core Viewpoint - The key to competition in the commercial aerospace industry lies in surpassing the profitability threshold of "2.8 tons payload at 800 km orbit," which is fundamentally linked to advancements in upstream hard technology, particularly in engine performance and 3D printing capabilities [1][2]. Industry Analysis - The commercial aerospace sector is entering a critical development phase, with 2026-2027 identified as a pivotal window for Chinese commercial rocket companies, marking the first flights of several medium to large liquid rockets and the practical testing of reusable technology [1][2]. - The demand for satellite internet, such as GW constellations, is driving the need for enhanced payload capacity and cost control, making companies that can meet the "2.8 tons at 800 km" threshold key players in the market [1][2]. Technological Advancements - Engine technology is evolving towards full-flow staged combustion and large thrust capabilities, which are essential for increasing rocket performance limits. Currently, most Chinese commercial rocket engines utilize gas generator cycles, but the industry is shifting towards more efficient full-flow staged combustion designs [3][4]. - 3D printing has become a core production capability in the aerospace sector, significantly reducing production cycles and weight. For instance, production times have decreased from 50 hours to 10 hours, with weight reductions exceeding 50% for certain components [10][11]. Market Dynamics - The transition from small solid rockets to medium and large liquid reusable rockets is reshaping the supply chain, with a focus on core components like 3D printing, large storage tanks, and servo systems, which are gaining increased market attention [2][3]. - The Chinese 3D printing market is projected to reach approximately 41.5 billion yuan in 2024, with the aerospace sector accounting for about 16.7% of this market, highlighting the growing importance of this technology in commercial rocket manufacturing [10][11]. Structural and Material Innovations - As payload capacities increase, rocket structures are evolving towards larger dimensions, with tank costs comprising over 60% of the overall structure costs. New materials, such as stainless steel, are being adopted for storage tanks due to their strength and cost-effectiveness [13]. - The control systems in rockets are also being upgraded to meet the demands of high-frequency launches, transitioning from traditional electric servos to electromechanical hydraulic servos, creating new market opportunities for related supply chain companies [13].