The Sukhoi Su-75 Checkmate (Russian: Сухой Су-75), also designated as the Light Tactical Aircraft (LTA; Russian: Лёгкий Тактический Самолёт - ЛТС, romanized: Legkiy Takticheskiy Samolyot - LTS), [1] [2] is a single-engine, stealth fighter aircraft under development by Sukhoi for export and for the Russian ...