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AVX JMR/FVL

AVX employs a horizontally integrated manufacturing strategy that utilizes a large compliment of world-class aviation industry team mates. The company claims that "By teaming with experienced aerospace companies for development of the AVX JMR/FVL design, AVX keeps the cost of development and eventual production of the aircraft lower than our competitors while delivering the highest levels of performance by the aircraft."

AVX Aircraft Company began its business life under founder David Brody in 2005 and has grown in both size and stature. In 2010 AVX Aircraft Company introduced itself at the annual Army Aviation Association of America (AAAA) convention held in Fort Worth, Texas. AVX also introduced its proposal for converting the current OH-58 Kiowa Warrior to a coaxial rotor dual ducted fan configuration that provides improved performance at the lowest cost. Since 2010 AVX Aircraft Company has grown in size and has submitted numerous proposals based on its patented coaxial rotor dual ducted fan design concept. AVX is currently refining its proposal for the US Army Future Vertical Lift (FVL) aircraft.

Ducted fan configurations are known for their superior aerodynamic performance over non-ducted fans and several implementations of ducted fan hovering air-vehicles have been developed and flown. However, most of these vehicles either utilized single duct configurations with the engine center mounted or utilized rotating ducts attached to a fuselage to for thrust vectoring. The application of ducted fan propulsion to hovering air-vehicles has been attempted and successfully demonstrated in various configurations but successfully meeting all the needs for a deployable system requires a combination of utility and physics of the problem to be addressed.

The coaxial main rotor/dual ducted fan configuration achieves a higher speed than conventional helicopters (coax, single rotor, or tandem) with auxiliary propulsion (the ducted fans), maintaining a level fuselage attitude, and low drag airframe design. The ducted fans provide all the propulsive force to overcome parasite drag; the rotor only provides lift in cruise.

In conventional helicopters the rotor is tilted to provide the propulsive force. The rotor incurs an increase in profile and induced power when it provides the propulsive force, making it less efficient than the ducted fans as a source of propulsive force. When the rotor is tilted to provide the propulsive force the fuselage pitches nose down which increases fuselage parasite and trim drag and aerodynamic download that requires an increase in rotor thrust; these effects increase power required. The AVX coaxial rotor/dual ducted fan configuration minimizes the parasite drag of the airframe and the rotor hubs and controls. These design features result in a cruise speed higher than conventional helicopters.

In level forward flight, lift is provided by the coaxial rotors while forward thrust is provided by the ducted fans. This results in the aircraft being level during forward flight, rather than tilted forward as is the case with conventional helicopter flight. The aircraft can ascend or descend with the fuselage level by changing the rotor collective pitch and adjusting cyclic to maintain a level fuselage attitude. If desired, the aircraft can ascend and descend by increasing or decreasing fan pitch to vary fan thrust, and pitching the fuselage nose up or nose down using cyclic pitch to maintain constant airspeed. Since the rotors are used only for lift in forward flight, and the lift is balanced because of the counter-rotating rotors, the aircraft can obtain greater forward speeds than are normally obtainable in a helicopter.



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