MiG-3 with AM-37 Engine

During the second half of 1941, to improve the aircraft’s maximum speed at high altitude, the ОКБ engineers equipped a MiG-3 with a Mikulin AM-37, an engine then under development that was rated at

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MiG-3 pilots taking the oath to the flag of the Guards when the 27 IAP was reorganized and became the 12 GvIAP (12th fighter aviation regiment of the Guards).

1,030 kW (1,400 ch) at 5,000 m (16,400 feet). Matching the new engine was no problem because both the AM-35A and the AM-37 had the same design dimensions and attachment points Test pilot A I Zhukov made a few flights with this reengined MiG-3. But in the end the whole program was canceled, development of the AM-37 having proved too difficult. In some ОКБ documents the MiG-3 with the AM – 37 engine is referred to as the MiG-7.