MiG-3 with AM-38 Engine
The main problem was engine overheating except in ambient temperatures below about 16°C (61°F). The aircraft was judged superior to the German Bf 109E and other Soviet fighters up to 4,000m (13,120ft), and time for a 360° turn was only 20-21 seconds. No production was possible, because all AM-38 engines were reserved for the Il-2. However, at least eighty damaged MiG fighters were re-engined with repaired AM-38 engines by VVS workshops. Some of these aircraft were modified with two 20mm ShVAK, with 100 rounds each, and sent to PVO (air defence) regiments. The reduced weights are not explained.