The Mikoyan-Gurevich I-220 was a prototype high-altitude fighter aircraft built in the Soviet Union during World War II.

Originally developed to counter the threat of German high-altitude reconnaissance aircraft, a total of seven prototypes were built and tested across five variants.

[1][2] However, it was not until late 1942 that a contract for two prototypes was placed with the Mikoyan and Gurevich OKB, which began work on Samolet A (Aircraft A).

[1] With overflights of Ju 86R reconnaissance aircraft still being a problem in the summer of 1942, work began on an I-220 variant with improved performance in the stratosphere.

[1] The I-222, or Samolet 3A, was similar to the I-221, but was powered by a 1,104 kW (1,480 hp) Mikulin AM-39B-1 engine with a single TK-300B turbo-supercharger on the left side of the cowling.

An intercooler for the turbo-supercharger was housed in a deep air duct underneath the fuselage near the leading edge of the wing.

[1] The aircraft was powered by a 1,052 kW (1,411 hp) Mikulin AM-39B engine driving a four-bladed AV-9L-22B propeller, and the intercooler air duct was made deeper.

Powered by a 1,750 hp (1,300 kW) Mikulin AM-42B engine driving a three-bladed AV-5A-22V propeller, and the underside of the cowling was deeper.

Factory flight testing of the second prototype was conducted between July and August 1943 before being handed over to the Soviet Air Forces (VVS).

The similar I-222 rolled out on 23 April 1944 and was first flown with its original three-bladed propeller on 7 May of that year by test pilot A. I. Zhukov.

The second I-225 had a brief flight test period beginning on 14 March 1945, during which it proved to be the second-fastest Soviet piston-engined fighter, second only to the VK-108-powered Yakovlev Yak-3.