The Pentagon will create a adaptive screw for helicopters

The Pentagon will create a "adaptive screw" for helicopters

Management of promising research projects (DARPA) has concluded the Pentagon with 3 South American companies have agreed to carry out the initial research in the area of the creation of the "adaptive rotor" (MAR) for helicopters — the screw, in which the blades will be able to modify the geometry and other characteristics during the flight. As reported by Aviation Week, agreements were signed with companies Boeing, Sikorsky and Bell-Boeing, letting tiltrotor V-22 Osprey.

In total, DARPA listed companies to conduct research 12,38 million bucks. 3.62 million dollars was concern Boeing, 2,86 million bucks — Bell-Boeing, 5,9 million bucks — Sikorsky. Some of the money companies have provided the Navy, Air Force and U.S. Army, interested in the project. Under the agreement, the new screw should one hundred percent built from scratch, and not due to further development of existing models.

The first step of the project provides for the development of technical solutions and design new propeller, as several prototypes that can test the existing models of helicopters. Duration of the first step of the development is 16 months. Closing is expected in the programs from 2018, then all output will be used in the project of creation of the last generation helicopter.

The main requirements to the latest development anticipate increasing capacity of the new screws is 30 percent compared with conventional screws. In addition, the design of "adaptive rotor" should provide a noise reduction of 50 percent and provide an increase in helicopter flight range by 40 percent. The level of vibration during rotation MAR should be reduced by 90 percent compared to conventional screws.

According to the manager of the project MAR Daniel Newman (Daniel Newman), the participants will have to apply in a new screw huge number of technologies, including a change in the angle of attack of the blades, their configuration, strength and speed. It should be emphasized that all of these characteristics need not be fixed and can be changed as before takeoff and during flight regardless of the effect we want, for example flight speed.

According to Newman, the construction of a helicopter rotor has not changed since 1960-1970's, when the South American military were working models of helicopters. Some companies have tried to introduce innovations, but they did not touch on the very design of the main rotor helicopter. "While we stubbornly invested in the creation of aircraft fifth-generation F-22 and F-35 helicopter design industry did not receive sufficient funds remained at a level equivalent to the F-4 Phantom", — explained Newman.

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