On the 27th, China's independently developed "Kunlong" AG600M successfully completed a 12 ton water pumping test with a new fire protection coating in Hubei Jingmen Zhanghe Airport. He Shengqiang, deputy general manager of aviation industry, said that the success of this test marked significant progress in the development of AG600M fire extinguisher. The project development has taken a solid step towards practical application, laying a solid foundation for subsequent continuous production, test flight and airworthiness verification. At 10:5 a.m., AG600M, which was loaded with 12 tons of water, took off from the runway of Zhanghe Airport, landed steadily in Zhanghe Reservoir after the completion of water injection in the water injection area. It took 15 seconds to draw 12 tons of water during high-speed taxiing on the water surface, and then rose to the sky. After completing a series of established test flight subjects in the air, it again poured water in the water injection area, accurately covering the target area, and landed successfully in Zhanghe Reservoir at 10:25 a.m. "During the whole test process, the aircraft was in good condition, all systems operated stably, the accuracy and amount of water injection met the design goals, and the verification of the continuous operation mode of" ground water injection - water pumping and water injection on the surface "was successfully completed." Xiong Xianpeng, Party Secretary and Chairman of China Aviation Tongfei South China Aircraft Industry Co., Ltd., and Executive Deputy Chief Commander of AG600M Project Site, said. As a large amphibious aircraft for fire fighting, the AG600M is equipped with a fire fighting task system with complete functions, which can realize various functions such as ground water injection, surface sliding water pumping, reagent premixing and multi-mode water injection. The development of AG600M has realized the continuous improvement and development of water pumping fire extinguishing task system technology from scratch, from existence to strength. "During the development process, the R&D team continued to improve and optimize the design of the fire extinguishing task system, and successively broke through a series of key technologies such as the demand development based on the forest fire extinguishing task scenario, the load calculation simulation in the high-speed water pumping process, the design of special human-computer interface for fire extinguishing tasks, and the comprehensive integrated design of synchronous opening of multi drop hatch doors, thus realizing its efficient fire extinguishing capability." Xiong Xianpeng said. At the same time, the R&D team and suppliers are based on the domestic industrial chain, supply chain and innovation chain, adhere to the localization of components, institutions and parts, and ensure the independent and controllable development of the system. This major test of AG600M water injection is another major milestone after the aircraft completed its first flight on land on May 31 and its first flight on water on August 29. At the test activity site, Aviation Industry Tongfei South China and Everbright Financial signed four aircraft purchase agreements and research and development financing agreements, and signed two aircraft purchase intent agreements with Henan Aviation Investment, marking a solid step in the verification of mission capability and marketing development of this type of aircraft. "The next task of AG600M is to speed up the adjustment of the test flight, freeze the aircraft status as soon as possible, and then complete the compliance test flight and the CAAC approved test flight. If everything goes well, you can obtain the airworthiness certificate as planned." Xiong Xianpeng said. The AG600M aircraft has a maximum takeoff weight of 60 tons, a maximum water carrying capacity of 12 tons, a minimum level flight speed of 220 km/h and a range of 4500 km. This type of aircraft has achieved 100% domestic self-development and domestic matching, including engines and key airborne systems. (Liu Xinshe)