Mikoyan-Gurevich I-211

Mikoyan-Gurevich

Industry	Aerospace, Defense
Founded	1939
Founder	Artem Mikoyan, Mikhail Gurevich
Headquarters	Soviet Union

Template:Good article Template:Infobox aircraft

The Mikoyan-Gurevich I-211 was a Soviet experimental fighter tailored for high-altitude missions during World War II. It evolved from the Mikoyan-Gurevich I-210, which itself was derived from the Mikoyan-Gurevich MiG-3, but featured a Shvetsov ASh-82F radial engine instead of the original powerplant. Although its development spanned a considerable period and culminated in a successful prototype, by early 1944—when factory testing concluded—the necessity for a specialized high-altitude fighter had diminished. Consequently, converting production lines from existing fighters to the I-211 was deemed impractical.

Development

The I-211 originated as a direct progression from the Mikoyan-Gurevich I-210, a prototype designed for high-altitude combat also known as the MiG-3-82 or MiG-9. Toward the end of 1941, it was decided to discontinue the use of the Mikulin AM-35A engine, previously powering the MiG-1 and MiG-3, in favor of the Mikulin AM-38 engine utilized in the Ilyushin Il-2. Prior to this shift, the Mikoyan design bureau had developed the I-210 variant by replacing the inline liquid-cooled engine with a larger diameter Shvetsov ASh-82 radial engine. To accommodate this change, several modifications were necessary; however, redesigning the engine cowling proved unsuccessful, resulting in performance inferior to that of contemporary fighters such as the Yak-1 and LaGG-3 when the I-210 first flew on 23 July 1941.

Designers Artem Mikoyan and Mikhail Gurevich pressed forward with enhancements, producing a new prototype known as the MiG I-211 or MiG-9Ye, which incorporated an upgraded ASh-82F engine. Compared to its predecessor, this model featured improved aerodynamic contours around the engine cowling, repositioned the cockpit rearwards by 24.5 cm (9.6 in), relocated oil cooler intakes to the bases of the wings, enclosed the oil cooler within the fuselage, and installed a larger vertical stabilizer. Armament consisted of two 20 mm (0.79 in) ShVAK cannon. The aircraft’s weight was approximately 300 kg (660 lb) lighter than that of the I-210, potentially due to an all-metal airframe construction, although this detail remains unverified.

Most of 1942 was dedicated to refining these design elements, with assembly commencing only in December of that year. The first flight took place on 24 February 1943. The combined reduction in drag and weight significantly enhanced performance relative to its predecessor: achieving a maximum speed of 670 km/h (420 mph) at an altitude of 7,000 m (23,000 ft), and reaching 5,000 m (16,000 ft) in just four minutes. Initially, the design bureau aimed to produce ten units during early 1943; however, prolonged factory testing delayed completion until early 1944. By then, demand for high-altitude fighters had substantially waned, leading to cancellation of further production after only a single prototype was constructed.

Nomenclature

In several earlier publications, the MiG I-211 has been referred to as the MiG-5. Current understanding clarifies that the MiG-5 designation was allocated to the production model of the MiG DIS, a twin-engine fighter that ultimately did not proceed to mass production. The abbreviation DIS stands for Dalnij Istrebitel Soprovozhdenya, which translates to long-range escort fighter. Likewise, the MiG-9 label was originally assigned to the production variant of the MiG-3 equipped with the ASh-82 radial engine. This designation was subsequently reassigned to Mikoyan-Gurevich's initial jet fighter model.

Operators

Template:USSR

• Soviet Air Force