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The Physics and Designs of Kites

kites explained.
by

Kelsey Spicer

on 11 March 2011

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Transcript of The Physics and Designs of Kites

Kites Kelsey Spicer
Ashley Peace
Sheryl Kaur How Kites Work >Kites are affected by the flow of air around and over the frame of the kite. The kite has resistance to the wind, which is provided by the string that the person flying the kite is holding.
>When kites fly, they change the normal air flow. Air changes direction and speed as it moves around the kite, sending it into the air.
>When a kite first meets the air it deflects the air downward, which creates an upward force and lifts the kite.
>The air over the kite is faster than the air under it. >Fast air creates less pressure than air underneath the kite, forcing it upward. Balancing a Kite >Bridle lines are attached in two places- the bottom
of the center stick and the front (nose).
Kites lines are made out of kite string, which is stronger then normal string.
>Towlines are the line kite fliers hold. It should be attached to the exact point where the kite is balanced (normally the middle of the bridle line). This is called the tow point and it allows the kite to fly because it divides airflow up evenly around the kite. Becasue the towline forces the kite to stay in one place, the kite goes up, not forward. Flying higher The length of the towline directly affects how high the kite will fly, and how stable it will fly. The higher the kite, the more air resistance (drag). The Tail >The tail is not necessary for kites to fly, but it keeps the kite more stable.
>Drag is created by the tail, slowing down sideways movements and showing more of the front of the kite to the wind. >When the tail creates drag, it lifts the front of the kite, allowing more air to lift the kite up. History of Kites >Kites appeared over 3,000 years ago in China.
>The Chinese used bamboo for the frame and silk for the sail and the bridle.
>The kites had a mythical and religious dimension.
>Later, the kites were experimented with as science instruments for various researchers.
>Kites spread from China through Asia, then Europe, and now in America, Australia, and other countries. Different kite designs serve different purposes >Kites can be enjoyed by all ages as a hobby.
>They are also used for scientific purposes, especially in meterology, aeronautics, and wireless communications.
>Kites are also used in sports, like kite surfing, kite buggying, and kite land boarding.
>Kites are seen in cultural festivals in many Asian countries. >Diamond kites are the most basic type of kite. They are easy to fly.
>Box kites give people illusions of two boxes floating in the air.
>Delta kites are considered stunt kites. You can turn Delta kites into different shapes like animals.
>There are many types of kites, including Barn Door kites, Sled kites, Sode kites, and Roller kites. Different Designs of kites
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