Sunday, January 6, 2008

Personal Air Vehicle

Personal Air Vehicle(PAV) is nowadays widely adopted by the U.S. aviation community and is actually a class of light general aviation aircraft which meet a specialized set of design and performance goals. NASA, in 2005, refined the definition of a PAV in describing its fifth Centennial Challenge initiative. PAVs are an emerging field of technology exploration.The fundamental premise of this frontier technology is to make the capability of flight convenient for an individual with a reduction in the specialized skills required to operate an aircraft. The final goal being a practical “highway in the sky” scenario where an individual is able to fly from point to point with the ease of driving an automobile.Gridlocked highways increasingly burden our society. Currently, the doorstep-to-doorstep average speed for cars is 35 mph. In the greater Los Angeles area, this speed is predicted to degrade to just 22 mph by year 2020. The U.S. Department of Transportation (DOT) states that 6.7 billion gallons of gasoline are wasted in traffic jams each year. This is over 20 times more gasoline than is consumed by today's entire general aviation fleet.
A future system of travel by PAVs expressly avoids air traffic jams and can substantially help to relieve those on our highways.A pure Synthetic Vision System infrastructure does not currently exist for general aviation aircraft. Current implementations of "Glass Cockpits" are now being adopted by general aircraft manufactures such as Cirrus Aircraft, Piper, Cessna, and Beechcraft.
The Federal Aviation Administration (FAA) current infrastructure is not currently capable of handling the sizable increase in aircraft traffic that would be generated by PAVs. The FAA is currently planning the Next Generation Air Transportation System targeted for 2025 to expand and completely transform the current aged system. See FAA NGATS Modeling by NASA and others have shown that PAV's using new smaller community airports would reduce traffic into larger airports serving the commercial fleet.
Of the two methods proposed for providing “door-to-door” capabilities, only the roadable option can be achieved utilizing existing airport facilities and ordinary roads. Currently, the only vehicles able to legally take off and land from a residential street are life-flight helicopters via special permission granted by the FAA on a case-by-case basis. In order to meet the goals set by NASA, thousands of small residential airports would be required to be built.
Community noise generated by aircraft is serious consideration for residential PAVs operations for take-off and landing. Without lower noise levels enabling residential landing capabilities, any PAV must still take off and land at an FAA controlled airport or private airfield, where the higher sound levels of operating aircraft have been approved.

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