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last updated on June 2, 2023
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The work on I-200 drawings began on 25 November 1939.
It differed from the project X because it had to be equipped with the
Mikulin AM-35 engine; this was because the AM-37 was not yet ready for
production; the AM-35A had the same dimensions, but its power was
200 hp lower.
The drawings were completed and were submitted to the authorities on
8 Dec.1939, and on 25 December a mockup was completed and approved; it
was used for tests in the TsAGI T-101 wind tunnel. Such tests were concluded
on January 2, 1940 and confirmed the good aerodynamic shape of the airframe,
even if they judged that the project performances were a bit optimistic.
The war appeared close, and so the government offices gave to Mikoyan
the date of July 1st, 1940 as a deadline for state acceptance trial. This
would be difficult to achieve because they had started slowly, and the
Lavockin I-301 and Yakovlev I-26 projects already had months of advantage
in development time.
Thanks to the help of technicians of Zavod 1 and his experience as
production technician, Mikoyan divided the I-200 into some sub-assembies
that could be produced separately and then easily assembled together by
a small number of simple connections; this modular conception was favourable
both for mass production and for maintenance, allowing to quickly remove
and replace a damaged sub-assembly even in field conditions.
Wide use was made of casted and moulded pieces, which were particularly
apt for mass production.
All the detail drawings were completed by February 10, 1940; there
were only 2500 pcs, thank to the simplifiation created by the use of moulded
parts.
As many other Soviet fighters, the I-200 was made partially of layered
wood; this led to a higher weight than aluminium-alloy structures, but
reduced the need for scarce strategic materials.
The rear fuselage and the outer parts of the wing were similarly constructed. |
The mid and aft fuselage were made with a structure of welded steel tubes, covered with aluminium alloy panels fixed by Dzus-type locks. The central part of wing was made of aluminium alloys, integral with the fuselage; the control surfaces were an aluminium alloy strut covered with fabric. |
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Thanks to a great effort from his bureau, which worked all the days
divided into 1,5-2 shifts, the I-200 No.01 prototype was completed on
March 31, 1940. Left: the photo shows the plane as it appeared in March. |
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These photos represent the I-200 No.1 in April, after modifications and repainting. The I-200 No.01 was first flown on April 5th, 1940 by the test pilot A.N. Ekatov of Zavod 1; on the whole, the test were satisfying, even if there were:
For a more detailed description of the I-200 No. 01, click on the profile below: |
The I-200 No. 02 was completed for tests on April 25, 1940;
it was first flown by M.N. Yaskushin on May 9.
For a more detailed description of the I-200 No. 02, click on the profile below: |
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The I-200 no.03 began ground tests of armament with regular syncronizer
on May 13, 1940. It was completed on June 1, and was flown on June 6 by M.I. Martselyuk. This prototype had metallic outer panels of the wings (rather than wooden, but this modify wasn't followed by subcessive aircrafts) and a new headlight FS-155; later it was equipped with radio device. Here are photos of I-200 no.03 during tests at NII-VVS. It was the first one to be painted with military livery, but still unmarked. The prototype was intended for tests on armament rather than for speed records, so the hinged canopy was removed for ease to bail out in case of emergency. Note the thermometer for air temperature during tests fixed on the left wing.
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The performances demonstrated by I-200s during the tests were highly satisfying,
particularly concerning speed. The I-200 No. 01, flown by Ekatov, reached 648,5
km/h at 6900 m in the nominal operating range of the engine on May 24; I-200
No. 02 flown by Yakushin reached 651 km/h at 700 m, at nominal power as well.
It reached 579 km/h at 2220 m and 605 km/h at 3630 m.
The fighter reached an altitude of 5,000 m in 5,1 min, and 7,000 m
in 7,15 min.
On May 25, 1940, even before the tests were end, the Committe for Defense
and the NKAP ordered the I-200 into production at Zavod 1, where it replaced
the bomber BB-22. It was expected than 125 I-200 would be built by the
end of 1940. Such a hurry was influenced by the enthusiasm of Stalin for
the exhibition on the Red Square on May 1, and for the results of the tests,
but the design team knew it was an error. In fact, tests show also that
the aircraft was demanding to fly; it was longitudinally unstable and had
a neutral lateral stability.
A list of 112 defects and needed corrections was made; this included
mainly:
The I-200 was first shown to the public at the Tushino Air Parade of
August 18, 1940, where the I-200 no.03 flown by Yakushin made a demonstration
flight.
On September 13, 1940, at a meeting between the OKO and NII-VVS to discuss the results of tests, the chief test pilot Suprun (on the right) commented that the I-200 was the only prototype to pass well the state tests at the first attempt; for comparison, the I-26 (later Yak-1) and I-301 (later LaGG-1) had to repeat the state tests for several times. |
Note: this page is widely based on the article of Arsenyev at http://www.23ag.sp.mk.ua/html/mig_1.html