Not long ago, Russia exhibited for the first time the Su-57-2 prototype equipped with a binary vectoring nozzle. Visually, four independent gas deflectors are installed at the rear of the "Product 30" engine of the Su-57 prototype, forming a flat binary vectoring nozzle. This engine controls the aircraft's flight attitude by adjusting the cross-sectional area and direction of the air outlet. The binary vector nozzle is considered a high-end configuration for stealth fighter jets. Flat nozzles help with engine air circulation, rapidly cool high-temperature exhaust plumes, reduce aircraft infrared characteristics, and lower the probability of detection. Unlike circular nozzles, the flat nozzle design of binary vector nozzles is complex and requires high production and processing technology for high-temperature resistant materials, making it a high-end technology in the world aviation manufacturing field. In recent years, with the installation of the fifth generation Su-57 aircraft in the Russian Air Force, problems such as large radar reflection cross-section and strong infrared radiation at the tail have been exposed, and the Russian Air Force urgently needs to upgrade the Su-57 fighter jets. Due to the refusal of the Russian Sukhoi Design Bureau to change the Su-57 fuselage, researchers have decided to improve the nozzle of the "Product 30" engine after comprehensive consideration. Develop heat-resistant materials. In response to the problem of thermal stress concentration at the corner of the nozzle, researchers have developed a special composite material of glass fiber and nickel based alloy to ensure that the structure remains strong and reliable under high temperature conditions of nearly 1700 ℃. Optimize nozzle airflow. Considering the difficulty of producing heat-resistant materials, researchers are seeking breakthroughs in cooling systems by opening micro cooling holes at the rectangular edge of the nozzle. This can optimize the airflow distribution at the rear of the aircraft and achieve rapid cooling by introducing cooling air. Install a numerical control system. In order to solve the problem of reduced thrust from flat nozzles, researchers have installed a fully digital electronic control system for the engine to control fuel, air flow, and exhaust temperature, increasing the thrust to weight ratio of the "Product 30" engine by 19%. It is reported that the Sukhoi Design Bureau has officially launched a new development project after signing a contract with the Russian Ministry of Defense, planning to equip the new fighter jet with a new "Product 30" engine. At the same time, Russia will install a flat nozzle on the "Product 117" engine of the "Hunter" drone to enhance its low detectability, which can be used in conjunction with the upgraded Su-57M fighter jet for coordinated operations. (New Society)