As the work on the MiG-25 was well under way, the single-engine Ye-152M was abandoned. But before it was finished, the PVO had selected the Tupolev Tu-128. The Ye-152M (converted from one of the two Ye-152 aircraft) was intended to be the definite heavy interceptor design. This led to Ye-152, alternatively known as Ye-166, which set several world records. The Ye-150 was noteworthy because it was built specifically to test the Tumansky R-15 engine, two of which would later be used for the MiG-25.
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The Mikoyan-Gurevich OKB had been working on a series of interceptors during the second half of the 1950s: the I-1, I-3U, I-7U, I-75, Ye-150, Ye-150A, Ye-152, Ye-152A, Ye-152P, and Ye-152M.
YE-152 and YE-152M experimental interceptor
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A major upgrade in the PVO defence system was required, and, at the start of 1958, a requirement was issued for manned interceptors capable of reaching 3,000 km/h (1,600 kn) and heights of up to 27 km (89,000 ft). The subsonic Boeing B-47 Stratojet and Boeing B-52 Stratofortress strategic bombers were followed by the Mach 2 Convair B-58 Hustler, with the Mach 3 North American B-70 Valkyrie on the drawing board at that time. In the late 1950s, the very high altitude overflights of Soviet territory by the Lockheed U-2 revealed the need for a higher altitude interceptor aircraft than available at that time.
The performance of these types of aircraft was steadily improved. This meant not only dealing with accidental border violations, but more importantly defending the vast airspace of the USSR against US reconnaissance aircraft and strategic bombers carrying free-fall nuclear bombs.
design theories were also evolving towards higher maneuverability due to combat performance in the Vietnam War. When first seen in reconnaissance photography, the large wings suggested an enormous and highly maneuverable fighter, at a time when U.S. The MiG-25 features a powerful radar and four air-to-air missiles and was theoretically capable of a ceiling of 27 km (89,000 ft). Although its thrust was sufficient to reach Mach 3.2+, its speed was limited to prevent engines from overheating at higher air speeds and possibly damaging them beyond repair. It has an operational top speed of Mach 2.83. The first prototype flew in 1964 and the aircraft entered service in 1970. It was to be the last plane designed by Mikhail Gurevich, before his retirement. Designed by the Soviet Union's Mikoyan-Gurevich bureau, it is one of the few combat aircraft built primarily using stainless steel. The Mikoyan-Gurevich MiG-25 ( Russian: Микоян и Гуревич МиГ-25 NATO reporting name: Foxbat) is a supersonic interceptor and reconnaissance aircraft that is among the fastest military aircraft to enter service.
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