Mikoyan-Gurevich I-211

I-211

Picture - Side view of the I-211

Role: Fighter
Manufacturer: Mikoyan-Gurevich
First flight: 12 February 1943
Status: prototype
Primary user: Soviet Air Force
Number built: 1
Developed from: Mikoyan-Gurevich MiG-3

The Mikoyan-Gurevich I-211 was a prototype Soviet fighter aircraft built during World War II. It was a version of the Mikoyan-Gurevich MiG-3 fitted with a Shvetsov ASh-82F radial engine. Its development was quite prolonged, although successful, and by the time it finished its manufacturer's trials in early 1944 there was no need for a high-altitude fighter and it was not worth reducing the production of existing fighters to convert a factory over to the I-211.

Development

The I-211 was a direct descendent of the Mikoyan-Gurevich I-210, also known as the MiG-9. Late in 1941, a decision was made to phase out production of the Mikulin AM-35A engine in the MiG-1 and MiG-3 in favor of the Mikulin AM-38 engine used in the Ilyushin Il-2. The MiG design team had already created a version using a Shvetsov ASh-82 radial engine instead of the inline, liquid-cooled engine of the MiG-3. A number of changes were made in order to accommodate the larger circumference of the radial engine, but the redesign of the engine cowling was a failure and the I-210 proved to be slower than the Yak-1 or the LaGG-3 when it first flew on 23 July 1941.

Mikoyan and Gurevich continued development and another prototype was built, the MiG I-211, or the MiG-9Ye, using the improved ASh-82F engine. Its improvements included aerodynamic refinements of the engine cowling, the cockpit was moved aft 24.5 cm (9.6 in), the oil cooler inlets were moved to the wing roots, the oil cooler was moved entirely inside fuselage and a larger tail was fitted. Its armament was two 20 mm (0.79 in) ShVAK cannon. It weighed some 300 kg (660 lb) less than the I-211, possibly due to an all-metal structure, but this cannot be confirmed.

These refinements took most of 1942 to design and assembly of the I-211 did not begin until December 1942. Its first flight was on 24 February 1943. The reduction in drag and in weight greatly improved performance over the I-211, with a top speed of 670 km/h (420 mph) at a height of 7,000 m (23,000 ft) and a time to 5,000 mm (200 in) of only 4.0 minutes. The OKB had originally planned to built ten in the first quarter of 1943, but the manufacturer's trials took an unexpectedly long time to complete and were not finished until the first quarter of 1944. By this time there was little demand for a high-altitude fighter and the project was canceled with only a single aircraft built.

Nomenclature

In a number of older books, the MiG I-211 is called the MiG-5. It is now established that the MiG-5 designation was reserved for the production version of the MiG DIS, a twin-engine fighter that did not enter production. The acronym DIS comes from Dalnij Istrebitel Soprovozhdenya or long-range escort fighter. Similarly the MiG-9 designation was intended for the production version of the MiG-3 with the ASh-82 radial engine. This name was reused shortly afterwards for the first Mikoyan-Gurevich jet fighter.

Operators

Soviet Union

Soviet Air Force

Specifications (I-211)

Data from Gordon, Soviet Airpower in World War 2

General characteristics

Crew: 1
Length: 7.954 m (26 ft 1 in)
Wingspan: 10.20 m (33 ft 5½ in)
Height: 3.63 m (11 ft 10 in)
Wing area: 17.44 m (187.7 sq ft)
Empty weight: 2,528 kg (5,573 lb)
Loaded weight: 3,100 kg (6,834 lb)
Powerplant: 1x— Shvetsov M-82F air-cooled radial piston engine, 1,380 kW (1,850 hp)

Performance

Maximum speed: 670 km/h (416 mph)
Range: 1,440 km (894 mi)
Service ceiling: 11,300 m (37,065 ft)

Armament

2 x— forward-firing ShVAK 20 mm (0.787 in) cannon mounted on the bottom of the engine cowling

Bibliography

Gordon, Yefim. Mikoyan's Piston-Engined Fighters (Red Star Volume 13). Earl Shilton, Leicester, UK: Midland Publishing Ltd., 2003. ISBN 1-85780-160-1.
Gordon, Yefim. Soviet Airpower in World War 2. Hinckley, England: Midland Publishing, 2008 ISBN 978-1-85780-304-4
Gordon, Yefim and Khazanov, Dmitri. Soviet Combat Aircraft of the Second World War, Volume One: Single-Engined Fighters. Earl Shilton, Leicester, UK: Midland Publishing Ltd., 1998. ISBN 1-85780-083-4.
Green, William. War Planes of the Second World War, Volume Three: Fighters. London: Macdonald & Co.(Publishers) Ltd., 1961. ISBN 0-356-01447-9.
Green, William and Swanborough, Gordon. WW2 Aircraft Fact Files: Soviet Air Force Fighters, Part 1. London: Macdonald and Jane's Publishers Ltd., 1977. ISBN 0-354-01026-3.

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Source: WikiPedia