Скачать с ютуб Russia demonstrates test flight of flat nozzle engine on Su-57 Felon в хорошем качестве

Russia demonstrates test flight of flat nozzle engine on Su-57 Felon

Russian Sukhoi Su-57 Felon stealth fighter jet has begun flight tests using a new flat nozzle . It was stated that the testing of the new nozzle system was carried out on the second prototype of the Su-57 with the “052” bore . However, details about the purpose of this test are still unclear. Initially, the development of this flat nozzle was for the Sukhoi S-70 Okhotnik unmanned combat aerial vehicle (UCAV) . The application of flat nozzles itself is nothing new in advanced fighter aircraft design. The United States, for example, has long implemented this system on the Lockheed Martin F-22 Raptor stealth fighter jet . The Pratt & Whitney F119 engine on the F-22, uses a thrust vectoring system to improve low-speed maneuverability and reduce radar cross-section. Similar to the F-22, the implementation of flat nozzles on the Su-57 could be aimed at improving stealth characteristics and flight performance. One of the most compelling reasons for flat nozzles is their impact on radar cross-section [RCS]. Conventional round nozzles are a giveaway for radar systems, as their circular shapes create strong radar reflections. In contrast, flat nozzles disrupt these reflections, scattering radar waves in unpredictable directions. This makes it significantly harder for enemy radars to detect and track the aircraft, reinforcing the Su-57’s low-observability credentials and enhancing its survivability in contested airspaces. Flat nozzles also excel in reducing the jet’s infrared [IR] signature. Fighter jets generate immense heat, especially at the engine exhaust, making them susceptible to IR-guided missiles. The flatter design disperses exhaust heat more effectively, creating a cooler overall thermal profile.