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Mi-38 - History

At the beginning the 80's into the air squadrons of the armed forces of the USSR began to enter the modernized multipurpose helicopters Mi-8[MT] with the high-powered engines [TVZ]-117. For the army needs was developed new Mi-18. However, the subdivisions of civil aviation continued to be satisfied by simple "eights". However, "old good" Mi-8, that served by faith and by the truth already two decades, beginnings to become obsolete and to need modernization in accordance with the requirements of time. The leaders Aeroflot together with the designers OF [MVZ] decided to conduct the improvement of the helicopters, intended for the national economy. Military customer did not object to this and. As a result on July 30, 1981. left the decision by the CC CPSU and the Council of Ministers of USSR about the creation of the modernized passenger-transport helicopter of average load capacity Mi-8[M] (name Mi-8[M] for the third time it was used for the designation of promising modernization Mi-8).

The demands of civil airmen differed from the demands of servicemen. The profitability of transportation was the principal criterion of the first. Therefore as the basis of modernization Mi-8 was assumed the replacement of engine [TV]2-117 on promising, more powerful and more economical [TV]7-117, whose project proposed Leningrad motor-building OKB, headed By [s].[P].[Izotovym]. Furthermore, it was intended to replace metal blades by the glass-plastic, to improve aerodynamics of fuselage due to a certain change in its circumscriptions and arrangement of fuel tanks under cargo floor. Many aggregates and systems it was intended to unify Mi-14 and Mi-18.

In the middle the 80's was undertaken the course on the acceleration of scientific and technical progress, in order to bring domestic technology into correspondence with the foreign analogs and the standards. Following the spirit of the times, with the support of the management of the ministry of aircraft industry the specialists of OKB considered it necessary to place in the construction Mi-8[M] the new technical solutions: elastomeric rotor hub, the retractable chassis, nontraditional X-shaped tail rotor and contemporary flight complex. Such improvements led to the development of practically new machine, which on the joint decision of customer and executors in 1983. was obtained designation Mi-38.

Subsequently the program of creation Mi-38 repeatedly underwent the numerous changes, directed toward an increase in the reliability, effectiveness and the weight perfection of aggregates and systems and, in the final analysis, to an improvement in the technical and economic indices of helicopter and an increase in its [konkurentospobnosti] on the World Market. Naturally, the realization of the new solutions could tighten the process of design and building. Not in better shape the periods of the execution of program affected economic cataclysms in our country. To the end 1987 g. with project Mi-38 dealt Kazan' branch " [MVZ] [im]. Of [m].[L].[Milya] ". Because of the need for a sharp increase in the technical level of developments the scientific and technical council and the management " [MVZ] of [im].[M].[L].[Milya] " made a decision about the transfer since January 1988. works on the project Mi-38 into Moscow OKB.

Design Mi-38 headed the chief designer Of [a].[N].[Ivanov], and after his death in 1995. the deputy chief designer [N].[I].[Chalov]. In 1989-1990 yr. the appearance of passenger-transport helicopter was determined. In comparison with the initial project Mi-8[M] it underwent large changes. Calculated normal takeoff mass grew from 12,5 to 14,2 t, and maximum - from 14 to 15,6 T. payload was 5 t in the transport cab and 6 t during the external suspension. Machine passed into the higher class of load capacity. Due to an increase in the installed power in the extraordinary regime the flight safety with failure of one of the engines grew considerably. The carried out technical and economic analysis showed that with the maximum takeoff mass the developed helicopter will exceed Mi-8: throughout the mass of transportable load 1,8 times, on the given productivity 2 times, on the fuel effectiveness 1,7 times. In 1993. the positive conclusion of model commission for helicopter is designed.

Mi-38 originally it was intended for the series building at the Kazan' helicopter plant. In order to accelerate the process of creation and mastery of new helicopter, the design project leader OF [MVZ] [M].[N].[Tishchenko] and general director [KVZ] Of [a].[P].[Lavrentev] signed in August 1990. "The solution about the joint building of the experimental models of helicopter Mi-38". They were obligated to build the prototypes of helicopter (both flying and for the ground-based static tests) together. Earlier the prototypes of helicopters were always built only in the experimental production. The solution ensured the colossal savings of means and the significant acceleration of the rates of the realization of project.

Helicopter Mi-38 became the first domestic helicopter, with design of which originally was provided for the certification according to the domestic and foreign standards. This accelerated the development in Russia of the certification legislative base AP -29, which includes the requirements of the American standard of airworthiness FAR-29. At present the certification basis of helicopter includes the newest European requirements JAR-29, which makes it possible to leave for the market with the production, which corresponds to world level, and certified both in Russia and in the West.

In parallel with the design Mi-38 on " [MVZ] of [im].[M].[L].[Milya] " were built the test benches, on which the prototypes of aggregates and systems tested, the special features of new constructions and technologies were investigated. Furthermore, flying station [MVZ] prepared flying laboratory Mi-8 for the tests of flight complex and rotor Mi-38.

The disintegration of the Soviet Union destroyed production relationships. The rates of the development of new helicopter sharply fell. Many participants in the project Mi-38 proved to be abroad or they turned to the release of other forms of production. At the same time, in the Russian of [vertoletostroiteley] appeared new possibilities for cooperation with the foreign developers of aviation engineering. In cooperation with [MVZ] and [KVZ] interested itself the largest European helicopter construction consortium Of eurocopter. From different "[milevskikh]" projects of the foreign of [vertoletostroiteley] drew the program Mi-38. In December 1992. between the Russian firms and Eurocopter was concluded preliminary agreement about the collaboration in the joint development, production and marketing of helicopter Mi-38.

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