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The invention finds greatest utility at noise sensitive, real estate limited inner-city airports. The increased lift of the airfoil will allow lower take-off and climb speeds, reducing runway requirements, and will facilitate steeper climbs and descents. Altitude to distance downrange could be increased by 50% and the aircraft may use 40% less runway.
Weight and balance concerns are routine design challenges. State of the art sail design addresses the airfoil shaping of tensile skins. Kevlar, carbon fiber, and other very high strength-to-weight materials are available. The drives and hardware are common. And finally, the fixed wing is simpler to build than current designs, and in conjunction with dynamic airfoils, lighter for a given area.
For further information:
Fred Wagner, Inventor
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Updated: March 12, 2004