Question: Which Soviet Union fighter aircraft, nicknamed "Sushka," uses the Saturn AL-31 engine?
Context: Vano "Ivan" Anastasovich Mikoyan (September 1, 1927 – November 25, 2016) was a Soviet Armenian aircraft designer, nephew of designer Artem Mikoyan.  In 1944-1945, he studied at the Aviation Technical School in Stalinabad, then graduated from the Zhukovsky Air Force Engineering Academy.  From 1953 he worked in OKB Mikoyan as assistant chief engineer, chief engineer for flight tests, and as the leading designer for MiG-21 family of fighter aircraft.  In 1965 he was appointed as the lead designer on the MiG-23 fighter aircraft, and the technical director of joint state tests after 1968.  Starting in 1973, Ivan was deputy chief designer for the MiG-29 fighter aircraft.  Later, he was an adviser for Russian Aircraft Corporation MiG. The Yakovlev Yak-9 was a single-engine fighter aircraft used by the Soviet Union in World War II and after.  Fundamentally a lighter development of the Yak-7 with the same armament, it arrived at the front at the end of 1942.  The Yak-9 had a lowered rear fuselage decking and all-around vision canopy.  Its lighter airframe gave the new fighter a flexibility that previous models had lacked.  The Yak-9 was the most mass-produced Soviet fighter of all time.  It remained in production from 1942 to 1948, with 16,769 built (14,579 during the war).  Towards the end of the war, the Yak-9 was the first Soviet aircraft to shoot down a Messerschmitt Me 262 jet. The Saturn AL-31 is a family of military turbofan engines.  It was developed by Lyulka, now NPO Saturn, of Soviet Union, originally for the Sukhoi Su-27 air superiority fighter.  It produces a thrust of 123 kN (27,600 lb) with afterburning in the AL-31F, 137 kN (30,800 lb) in the AL-31FM (AL-35F) and 145 kN (32,000 lb) in the AL-37FU variants.  Currently it powers all Su-27 derivatives and the Chengdu J-10 multirole jet fighter which has been developed by China. The Grigorovich I-Z was a fighter aircraft developed in the Soviet Union during the 1930s.  Advances in aircraft survivability thanks to all-metal construction and self-sealing and inert gas-filled fuel tanks led to experimentation with large-caliber weapons to shoot them down.  In Soviet Union, L. V. Kurchevskiy developed a series of recoilless rifles in various calibers and in 1930 was decided to adapt the 76.2 mm (3 in) weapons for aircraft use. The Mikoyan-Gurevich I-250 (Samolet N) was a Soviet fighter aircraft developed as part of a crash program in 1944 to develop a high-performance fighter to counter German turbojet-powered aircraft such as the Messerschmitt Me-262.  The Mikoyan-Gurevich design bureau decided to focus on a design that used something more mature than the jet engine, which was still at an experimental stage in the Soviet Union, and chose a mixed-power solution with the VRDK ("Vozdushno-Reaktivny Dvigatel Kompressornyi" – air reaction compressor jet) motorjet powered by the Klimov VK-107 V12 engine.  While quite successful when it worked, with a maximum speed of 820 km/h being reached during trials, production problems with the VRDK fatally delayed the program and it was canceled in 1948 as obsolete. The Sukhoi S-54 is a series of three closely related aircraft proposals; the S-54 trainer aircraft, S-55 light fighter designed for export, and the S-56 carrier-capable light fighter.  All members of the family resemble the Sukhoi Su-27 in general form, or the Sukhoi Su-33 more closely, but built around a single example of the Saturn AL-31 engine instead of two, and scaled down accordingly to a smaller layout.  The design was offered to several potential customers, including South Africa and India, but was turned down.  Development is apparently on hold, awaiting a launch customer. Laville DI-4 (Russian: Лавиль ДИ-4 ) was a prototype two-seat fighter aircraft developed in the Soviet Union in the 1930s.  The chief designer Henri Laville was one of several French aviation specialists invited to work in the Soviet Union and not surprisingly the DI-4 layout was typical of the French trend at the time with a high-mounted gull wing (first for a Soviet aircraft) and all-metal construction.  Test flight program was completed in 1933 but despite good performance the aircraft did not enter mass production, in part because Soviet Union had no plans to purchase the Curtiss V-1570 engine. The Mikoyan-Gurevich MiG-1 (Russian: Микоян-Гуревич МиГ-1 ) was a Soviet fighter aircraft of World War II that was designed to meet a requirement for a high-altitude fighter issued in 1939.  To minimize demand on strategic materials such as aluminum, the aircraft was mostly constructed from steel tubing and wood.  Flight testing revealed a number of deficiencies, but it was ordered into production before they could be fixed.  Although difficult to handle, one hundred were built before the design was modified into the MiG-3.  The aircraft was issued to fighter regiments of the Soviet Air Forces (VVS) in 1941, but most were apparently destroyed during the opening days of Operation Barbarossa, the German invasion of the Soviet Union in June 1941. The Mikoyan-Gurevich MiG-23 (Russian: Микоян и Гуревич МиГ-23 ; NATO reporting name: Flogger) is a variable-geometry fighter aircraft, designed by the Mikoyan-Gurevich design bureau in the Soviet Union.  It is considered to belong to the Soviet third-generation jet fighter category, along with similarly aged Soviet fighters such as the MiG-25 "Foxbat".  It was the first attempt by the Soviet Union to design look-down/shoot-down radar and one of the first to be armed with beyond visual range missiles. Production started in 1970 and reached large numbers with over 5,000 aircraft built.  Today the MiG-23 remains in limited service with some export customers. The Sukhoi Su-27 (Russian: Сухой Су-27 ; NATO reporting name: Flanker; nicknamed "Sushka" in USSR) is a twin-engine supermaneuverable fighter aircraft designed by Sukhoi.  It was intended as a direct competitor for the large United States fourth-generation fighters such as the Grumman F-14 Tomcat and F-15 Eagle, with 3530 km range, heavy aircraft ordnance, sophisticated avionics and high maneuverability.  The Su-27 was designed for air superiority missions, and subsequent variants are able to perform almost all aerial warfare operations.  It was designed with the Mikoyan MiG-29 as its complement.
Answer: Sukhoi Su-27