Mikoyan-Gurevich Ye-8

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The Mikoyan-Gurevich Ye-8 represented a supersonic jet fighter prototype from the Soviet Union, designed as a potential successor to the MiG-21 (initially designated MiG-23). Constructed between 1960 and 1961, only two units were produced. Unlike the original MiG-21, the air intakes were relocated beneath the fuselage, which allowed for installation of a larger, more powerful radar system in the nose section, enabling deployment of longer-range air-to-air missiles. Additionally, small canard surfaces were positioned on either side of the nose ahead of the cockpit, while the MiG-21's horizontal stabilizers remained unchanged in their original locations.

Flight tests of both prototypes occurred in 1962. On September 11 of that year, the Tumansky R-21F-300 powerplant, which was still under development, suffered an in-flight explosion at approximately Mach 2.15. The lead Soviet test pilot at the time, Georgy Konstantinovich Mosolov, sustained serious injuries from compressor fragments and was forced to eject at Mach 1.78.

The project was ultimately discontinued due to unresolved technical challenges; however, several components were later incorporated into the development of the MiG-23, including the Vympel R-23 missiles and their corresponding Sapfir-23 radar system.