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MiG I-3 (I-380) / I-3U (I-420)

In 1956, the I-3P (I-410) interceptor fighter project was transformed into another version of the I-3U (I-420) aircraft (the corresponding Council of Ministers Decree was issued on March 2). The "U" index denoted the interceptor's work in the "Uragan-1" system, which was intended for automated control of flight and shooting. It was created according to the same Resolution of the Council of Ministers and included three main components: the Almaz radar, the counting automaton and the autopilot AP -36. The "Uragan-1" system made it possible to detect targets at a distance of about 17 km, automatically accompany them and open fire when approaching to a certain distance.

To accelerate the testing process, an experienced interceptor decided to build by reworking the already prepared front-line I-3 fighter. The wings with a sweep of 60 almost did not change, the forward part of the fuselage was improved, the cabin, instead of three NR-30 guns, two (one at the root of the wing) were installed. However, KB K Ya Klimov was still detained by the engine, and the tests of the aircraft in 1955 could not begin. Even before the completion of the I-7U development, a prototype VK-3 engine for the I-3U was still delivered, and the aircraft in 1956 went on trial. By the end of the year, 10 flights have been completed, of which 7 are general flights for the engine and airplane test programs.

Flight characteristics of the interceptor proved to be quite high for the second half of the 1950s: with a take-off weight of 9220 kg, a maximum speed of I960 km / h and a ceiling of 18,000 m was achieved, a height of 15,000 m was gained by the fighter in 2.4 minutes. In December 1956, flights were suspended due to the return of VC-3 to the plant #117 at its request to replace the compressor blades manufactured using the new technology. The revised VK-3 engine was planned to be delivered in January 1957.

As a result of frequent revisions of the VK-3 engine and its dispatch to the plant No. 117, in 1957 the aircraft had a simple flight time of 118 days, and in connection with the replacement of BU-27 and BU-28 boosters for new BU-44 and BU-45 - 35 days. In total, in 1957, during the factory flight tests, 34 flights were completed. As of January 1, 1958, the completion of factory tests was 43%. In the first quarter of 1958, regular work was carried out on the plane. In accordance with the Decree of the Council of Ministers of June 4, 1958 and the order of the Civil Aviation Committee of June 17, 1958, work on the aircraft was discontinued.

Modification I-420
Wing span, m 8,99
Length, m 14,83
Wing area, m2 30,00
Weight, kg-
Empty airplane 5490
-maximum take-off 7580-
Fuel 1800
Type of engine 1 x TRD VK-3
Traction, kgf 1 x 8400
Maximum speed, km / h
- on the ground 1440
at height 1780
Practical range, km -
Practical ceiling, m 18000
Crew, people 1
Armament two 30 mm guns HP-30.

MiG I-3 (I-380) / I-3U (I-420) MiG I-3 (I-380) / I-3U (I-420)



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