The term "ace in a day" is used to designate a pilot who has shot down five or more airplanes in a single day, based on usual definition of an "ace" as one with five or more aerial victories. A flying ace, fighter ace or air ace is a military aviator credited with shooting down five or more enemy aircraft during aerial combat. The actual number of aerial victories required to officially qualify as an ace are varied, but is usually considered to be five or more. Fighter aces in World War II had tremendously varying kill scores, affected as they were by many factors: the pilot's skill level, the performance of the airplane he flew and those he flew against, how long he served, his opportunity to meet the enemy in the air (Allied to Axis disproportion), whether he was the formation's leader or a wingman, the standards his air service brought to the awarding of victory credits, et cetera. The idea to produce a new fighter for the Red Army Air Force went as far back as 1941. It was then that the Yakovlev Design Bureau presented the I-30 prototype, intended an alternative to the earlier Yak-1 design. However, the German invasion of the USSR, as well as aluminium shortages, meant that the project had to be put on hold. Yakovlev resumed the development in 1943 while working on an upgraded version of the Yak-1 fighter. This time, it was decided that a new aircraft should be produced to completely replace the Yak-1 and Yak-7 models. The new machine was dubbed as the Yak-3 and entered service with the Red Army Air Force in 1944. The new fighter quickly became very popular with Soviet pilots. They highly praised its solid armament of two Berezin UBS 12.7 mm machine guns and one ShVAK 20 mm cannon as well as ease of piloting and superb low-altitude performance. Marcel Albert, the top scoring French ace of World War II, cited the Yak-3 as one of the best fighters of the war, along with the P-51 Mustang and the Supermarine Spitfire. After the war, the Yak-3 was also used by the Air Forces of Socialist Yugoslavia and Poland. The Yak-3 was a Soviet single-engine fighter of the WWII era. It was the first combat aircraft designed by Alexander Yakovlev's construction bureau. The Yak-3 was a further modification of the Yak-1, produced in 1944 and 1945, with a total of 4,848 built, and considered one of the best fighters of the war. In February 1943, a new Yak-1M variant was completed. It was a further development of the Yak-1, differing from it mainly in lower weight and smaller wing span. By September 1943, yet another improved variant was ready, designated Yak-1M Dubler, on which the canvas skin on the tail section was replaced with 2mm plywood, and oil and water radiators were improved. The Dubler also had a new mastless antenna, a ring sight instead of a reflector sight, improved armor and a new propeller. Test pilots were impressed by the new prototype. Their report stated in part: ""Yak-1M possessed excellent horizontal, and especially vertical, maneuverability. Top speed greatly improved compared to earlier serial-production Yaks. Despite improved performance, the aircraft remains easy to fly and does not require extensive pilot training."" Therefore, the new modification went into production, receiving a new designation, Yak-3. One of the most memorable air battles for the Yak-3 took place on 16th July 1944, when the plane showed it could confidently engage superior enemy forces. On that day, 10 Yak-3s met 8 Bf-109s and 4 FW-190s, with the battle eventually growing to 18 Soviet and 24 German planes. In the end, 15 German planes were shot down, for the loss of a single Yak-3. aircraft : Yak-1 ammo : tracer 0.50 cals, ground 20mm convergence : 800m Setup : Keyboard and mouse mouse joystick (not mouse aim as there is no Instructor in Air Simulator Battle) game mode : Aircraft Simulated Battle Enduring Confrontation