How does the 177S engine compare to others?
Promoted as a clean-sheet fifth generation engine, the 177 is positioned to replace the AL-41F1 with a higher thrust powerplant, delivering more fuel efficiency and a longer service life. Advanced FADEC controls and designed in thrust vectoring nozzles will strengthen the Su-57’s legendary agility. The Su-57 offers notable manoeuvrability and design innovation but faces ongoing development challenges. While both represent national approaches to fifth-generation air power, the F-35 currently holds the operational and technological edge.A Fighter the IAF Already Rejected The Su-57 is not new to India. The IAF had partnered in its development through the PAK-FA programme, investing nearly $290 million before walking away. At the time, the assessment was clear: the aircraft lacked true fifth-generation qualities.