The light multipurpose helicopter, the Ka-26 with two piston engines of F-14B-26, is widespread in various sectors of national economy of the Soviet Union. Its serial production was carried out from 1968 to 1977. A total of 825 helicopters were produced, of which about 400 are currently  continuing to operate in Russia, the CIS republics and several foreign countries.
In 1983, Kamov began to develop a modernized version of the popular helicopter, known as Ka-126. The main thrust of the modernization replacement of the piston power plant with modern gas turbine engines TV-O-100 with a power of 720 hp. The first flight of the helicopter Ka-126 engine with a TV-O-100 was 19 October, 1987 its serial production to be carried out in Romania. However, the violation of cooperation of former members of CMEA prevented those plans: Romania managed to build only 12 helicopters, another 3 were produced in Russia. On the basis of Ka-126 has also developed an export version of Ka-128 single-engine turbovalnym "Turbomeka Ariel" 1D1 output of 722 hp on the order of the Ministry of Emergency Situations of Russia, Gazprom and the mayor's office in Moscow.
Kamov in 1990 developed on the base of Ka-126 twin multipurpose the Ka-226 helicopter with two Allied Signal turbine engines.
The Ka-128 was a general purpose light helicopter design. It differed from the Ka-126 only in power plant and the addition of an intermediate gearbox. The export modification Ka-128 was developed on the basis of Ka-126. On the export version it was foreseen to install French engine Ariel 1D1 731kW. Development began 1992. It failed to achieve a planned 1994 first flight; no subsequent report of testing.
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