Sukhoi After the war, Sukhoi and his team were among the first Soviet aircraft designers who led the work on jet aircraft, creating several experimental jet fighters. Sukhoi started developing two jet fighters, the Sukhoi Su-5 and the Sukhoi Su-7 before 1945. The Su-5 is a mixed power jet fighter, using both a propellor and a motorjet to power it, but the experiment was later cancelled even though the fighter had a maiden flight in April 6, 1945. The Su-7 is a swept-wing, supersonic, air superiority fighter, and it was successful as it was adopted by the Soviet Air Forces in
Sukhoi Su-57 produced, and some believe it to be an implicit announcement of the project's cancellation. The slowing of procurement could be because of the current slow growth of the Russian economy, while the future patches' procurement are for an unknown future; the Russian military could be waiting for the more powerful Saturn izdeliye 30 engine to be ready for serial production. On 22 August 2018, during the International Military-Technical Forum «ARMY-2018», the Russian Ministry of Defence and the JSC Sukhoi signed the first contract for delivery of two serial Su-57s. The contract should be finalized between 2018 and 2020. The prototype's