Saturn AL-41
The Saturn AL-41 is a designation for two different Russian military turbofan engine variants by NPO Lyulka-Saturn. The original AL-41F, development designation izdeliye 20, was a variable-bypass ratio turbofan engine, designed for supercruise flight for the MFI (Mnogofunktsionalni Frontovoy Istrebitel, "Multifunctional Frontline Fighter") program, which resulted in the Mikoyan Project 1.44.