Mikoyan-Gurevich MiG-15 (NATO reporting name: “Fagot”) is a jet fighter developed for the Soviet Union by Mikoyan-Gurevich OKB. MiG-15 was one of the first successful swept-wing jet fighters, and it achieved fame in the skies over Korea, where early in the war, it outclassed all straight-winged enemy fighters in most applications.
MiG-15 is often mentioned along with the North American F-86 Sabre as among the best fighter aircraft of the Korean War and in comparisons with fighters of other eras. MiG-15bis is an improved MiG-15 version; the main difference is the improved engine, the Klimov VK-1.
Its level speed at sea level was increased by 26 km/h to 1,076 km/h. Noticeable change is a huge improvement of thrust-to-weight ratio which increased the acceleration by ~10% and it also has a huge impact on its climb rate, it can reach up to 50 m/s at low altitude with full fuel tanks, making the MiG-15bis one of the best climbing planes compared to other planes at similar battle rating.