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The shape of modern airliners has changed.

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While they may appear less streamlined,

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the shape is actually more aerodynamically effective.

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Look around the airport and you will see that

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many newer aircraft have dimples or recessed areas.

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Other have puffy areas.

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This reshaping of the fuselage results from applying

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what is known as the "Area Rule"

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and it is a NASA creation that is

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revolutionizing the look of today's air fleet.

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NASA engineers worked with the theory

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that the intersection of these points,

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wing to fuselage and others,

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were sources of increased drag,

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the force that slows down the airplane

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and/or increases fuel consumption.

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By reducing the cross section of the fuselage

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at the point of intersection,

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by narrowing the fuselage at this point,

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or increasing it everywhere but the intersections,

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we can reduce drag.

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Reducing drag equals greater speed or efficiency.

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The theory proved true.

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The results were dramatically positive

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and the proof may be as close as the next gate.