Aviation of Word War II

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MiG-9E (I-211)

Fighter (prototype)

Mikoyan, Gurevich

MiG-9E (I-211)

MiG-9E (I-211) - modification of the MiG-3 fighter with the M-82F engine

In the IV quarter of 1942, the OKB-155 team was instructed to modify the MiG-3 fighter for the M-82F air-cooled engine with a take-off power of 1850 hp. Taking into account the experience of building the MiG-9 aircraft with the M-82A engine, as well as the results of its blowing in the TsAGI wind tunnel, a fundamental revision of the design of all units was carried out in terms of reducing weight, improving the sealing and aerodynamics of the aircraft.

As a result of the work carried out, the takeoff weight of the I-211 fighter was reduced by 280 kg and amounted to 3070 kg. The design of the engine hood was especially carefully worked out for better internal sealing and compliance with the fuselage. To reduce drag, oil coolers were removed from the airflow inside the aircraft, and their air intakes were placed in the leading edge of the center section near the sides of the fuselage. The new engine hood was designed very carefully. The aircraft received a new, lightweight landing gear. The slats were missing. The horizontal stabilizer was raised higher, and the keel was completely redesigned. All these measures have significantly improved the speed of the aircraft.

The armament of the aircraft consisted of two synchronized ShVAK cannons of 20 mm caliber with an ammunition load of 150 rounds per barrel. In this version, the MiG was designated as I-211 or project "E".

The assembly of the I-211 prototype was completed on January 28, 1943. Ground tests began on February 12, and on February 24, the first flight on the I-211 was made by V.N. Savkin. Simultaneously with the start of testing, they began assembling ten pre-production vehicles, designated as MiG-9E. But the assembly was not completed, and all evidence of the combat use of these MiGs is not documented.

Factory tests of the I-211 aircraft were completed only in the 1st quarter of 1944. The plane turned out to be successful. On tests, he developed a maximum speed of 670 km / h, and gained a height of 5000 meters in four minutes. The I-211 was significantly superior to the La-5FN, and the La-7 was slightly inferior in speed, surpassing it in rate of climb. But the La-7, which was a development of the already produced La-5FN, had an advantage, so it did not come to state tests and serial production of the I-211.

MiG-3 with Pratt-Whitney R-2800-63 engine and C-23 turbocharger. Project. In March 1944, OKB-155 worked out a variant of the MiG-3 fighter with a Pratt-Whitney R-2800-63 engine and a General Electric S-23 turbocharger, which were installed on the American Republic R-47D-10RE Thunderbolt fighter. The MiG-9E (I-211) fighter was adopted as the basis for the project. With a design power of 2250 hp. (taking into account high-speed boost) the aircraft was supposed to have a maximum speed of 740 km / h at an altitude of 10,000 m and a service ceiling of 14,500 m. The flight weight was to be 3,800 kg. On April 8, 1944, the materials were submitted for consideration to the NKAP, but the matter did not go further than theoretical developments.


                                                                                                                                                                                                              
MiG-9 Specification
I-210/MiG-9 I-211/MiG-9E
Crew 1 1
Dimensions
Length, m 8.078 7.95
Wing span, m 10.2 10.2
Wing area, m² 17.44 17.44
Height, m 3.84  
Weights
Weight, kg Empty weight 2762 2590
Maximum takeoff weight 3382 3070
Fuel, kg 360 300
Powerplant
Engine M-82 M-82F
Power, hp 1,700 1,850
Performance
Speed, km/h maximum 565 670
at altitude, m 6150 7,100
Time to level 5,000 m, min 6.7 4
Service ceiling, m 8,700 11,300
Service range, km   940
Photo Description

Drawing MiG-9E (I-211)

The MiG-9E (I-211)

The MiG-9E (I-211) fighter powered with M-82F engine

Bibliography

  • "The history of designs of planes in USSR 1938-1950" /Vadim Shavrov/
  • "Planes of Stalin falcons" /Konstantin Kosminkov and Dmitriy Grinyuk/
  • "The Soviet planes" /Alexander Yakovlev/