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Reduced certain type of drag (air resistance) and thus improves fuel efficiency and range.

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What is the wingspan of the plane in feet?

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When do Wingtip vortices are created only when an aircraft is?

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The wingtip vortex, which rotates around from below the wing, strikes the cambered surface of the winglet, generating a force that angles inward and slightly forward,. The winglet converts some of the wasted energy in the wingtip vortex to an apparent thrust.Another potential benefit of winglets is that they reduce the strength of wingtip vortices.For more details visit: www.phoenixaerotech.comor mail me at: dinesh@phoenixaerotech.com


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What is wake turbulence?

"Wake turbulence is turbulence that forms behind an aircraft as it passes through the air. This turbulence includes various components, the most important of which are wingtip vortices and jetwash. Jetwash refers simply to the rapidly moving gasses expelled from a jet engine; it is extremely turbulent, but of short duration. Wingtip vortices, on the other hand, are much more stable and can remain in the air for up to three minutes after the passage of an aircraft. Wingtip vortices make up the primary and most dangerous component of wake turbulence. Wake turbulence is especially hazardous during the landing and take off phases of flight, for three reasons. The first is that during take-off and landing, aircraft operate at low speeds and high angle of attack. This flight attitude maximizes the formation of dangerous wingtip vortices. Secondly, takeoff and landing are the times when a plane is operating closest to its stall speed and to the ground - meaning there is little margin for recovery in the event of encountering another aircraft's wake turbulence. Thirdly, these phases of flight put aircraft closest together and along the same flightpath, maximizing the chance of encountering the phenomenon." -http://en.wikipedia.org/wiki/Wake_turbulence


Why do large aircraft have vertical tips on the ends of there main wings?

Wingtip devices are installed in an attempt to improve the performance of the wing in some way. Because they vary a bit is shape and in the manner they are attached, the way they modify the performance of the wing varies. The vertical wingtip devices, or winglets, generally act to reduce the vortex at the wing tip and decrease drag. The general answer to the question is that they have the wingtip devices to improve the aerodynamic performance of the wing.The vertical tip of the wing is called a 'winglet', and it is there to reduce the turbulence that is called a vortex, which is a spinning form of turbulence. These vortices can be clearly seen in videos of the space shuttle landing, when the camera angle is right. These vortexes cause drag, which slows the aircraft down, and reduces fuel efficiency.