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V-60 multirole military helicopter 1988

Already in 1984, by Decree of the Central Committee of the CPSU and the Council of Ministers of the USSR for No. 816-177 OKB them. N.I. Kamov set the task of developing a new army multi-purpose helicopter under the same code V-60.

The tactical and technical task for the V-60 helicopter, in addition to reconnaissance and target designation tasks, also prescribed functions for combating armored vehicles, suppressing strengthened firing points, and the possibility of delivering or evacuating reconnaissance and sabotage groups in the amount of 4-5 people. At the same time, the helicopter had to have high flight performance with a priority of speed parameters up to 300 ÷ 320 km / h.

In support of the tasks, the helicopter was already equipped with two gas turbine engines TV-0-100 of the same OMKB, and the take-off weight of the helicopter varied within 4000 ÷ 4500 kg. Solving the task in OKB them. N.I. Kamova understood the complexity of creating such a helicopter due to the inconsistency of certain provisions of its TTZ. Therefore, when forming the appearance of a helicopter and, in particular, its supporting system, the design bureau no longer limited itself only to the coaxial design of the main rotors, but considered the variety of the supporting circuits of the helicopter as a tool for optimizing the solution of tasks assigned to the TTZ.

Three helicopter configurations were examined at once:

1. helicopter with coaxial rotors;
2. a helicopter with a single rotor and a jet device for reactive torque compensation and heading control;
3. helicopter with a single rotor and tail rotor in the annular channel of the vertical tail.

The work was carried out in a wide range of different research areas, ranging from conceptual, coupled with in-depth engineering analysis of these helicopter configurations, and experimental work in wind tunnels and at a flying laboratory. The leading designers of these works at different time periods were: Kolganov V.V. , Kostyuk V.D., Furman V.A. Each helicopter configuration was evaluated at the level of in-depth study of the conceptual design, and the design decisions of the units and systems were worked out on full-scale mock-ups.

Aerodynamic configurations of the airframe and elements of the helicopter support system were worked out in TsAGI wind tunnels, and on problematic issues, the aerodynamics and dynamics of helicopter behavior in flight were carried out at a flying laboratory.

By this period (1984 ÷ 1985), the N.I.Kamov Design Bureau had already gained experience in creating a highly maneuverable high-speed combat helicopter Ka-50, which showed that the implementation of the requirements for advancement specified in the TTZ for the speed of multi-purpose reconnaissance and combat helicopter V-60 in coaxial configuration of rotors is achievable. At the same time, a comprehensive solution to the aerodynamic and energy parameters of the helicopter and its supporting system is needed, aimed at a significant reduction in the drag of the fuselage, profile and inductive resistance of the blades and increase the power ratio of the helicopter, providing high specific loads on the swept area of the rotor.

In this regard, a large amount of work was carried out to achieve low drag characteristics (C x S) of the helicopter. The work included both the formation of the corresponding aerodynamic contours of the fuselage and aerodynamic bonding of the units of the coaxial rotor (Fig. 2). It should be noted that the aforementioned technical solution for the nosing of coaxial rotor assemblies was far ahead in this regard of the technical solution used by Sikorsky Aircraft Corporation on the Sikorsky X2 experimental helicopter (patent US 8303208).

In the course of work on the project, the actual weight of the helicopter already varies within the range of 5500 ÷ 6000 kg, which required an appropriate adjustment of the technical specifications. The constructive solution of the hub and rotor blades are borrowed from the Ka-50 helicopter, as they proved the high level of their combat survivability.

However, the well-known negative situation in the country taking shape by the beginning of the nineties, caused by the painful period of the beginning of the formation of market relations in all industrial and economic structures, practically “de-energized” financial flows for development work.

In 1990, OKB N.I. Kamova, in order to attract investments, initiated work on the creation of a civilian version of the V-60 helicopter under the code Ka-62.