<p class="ql-block">📌 拓展kite(the flying fish)</p><p class="ql-block"><br></p> <p class="ql-block">Kite flying traces its roots back to early China, and the development of paper. Chinese kite designs particularly tend to ecopy flying insects, birds, and other beasts, real and mythical. The finest modern Chinese kites are made from split bamboo (usually golden bamboo), covered with silk and hand painted to form an overall artistic statement within a tradition of long standing.</p> <p class="ql-block">Why were Kites Invented?</p><p class="ql-block">They were mostly used for defence purposes. The early kites were composed of light wood and cloth and were referred to as prototype pieces today. They were created to resemble the natural flying of a bird.</p><p class="ql-block"><br></p><p class="ql-block">The early Chinese ones were used to measure distances, which proved beneficial for transporting big armies across rough terrain. They were used to measure and record wind data, and they served as a unique mode of communication akin to ship flags at seas</p> <p class="ql-block">Where to fly a kite</p><p class="ql-block">Once you have your kite, you need to find an ideal spot to take the kids to fly it. Kites must be flown in open spaces that are not near any trees or power lines. (Think Charlie Brown and all the times his kites got stuck in a tree.) The beach, an open field, or meadow in a park are the perfect spots for kite flying. Remember to take into account the people around you. Find a spot where you aren’t going to get in anyone’s way because what goes up eventually does come down.</p> <p class="ql-block">When to fly a kite</p><p class="ql-block">Clearly, wind is a necessary component to successfully getting your kite off the ground and into the air. That is what makes the beach a prime spot for kite flying, since winds are typically blowing in off the water. Experts recommend not flying your kite when the wind speed exceeds 20 miles per hour (mph) because the kite can be damaged.</p> <p class="ql-block">How to get your kite into the air</p><p class="ql-block">Turn and stand so your back is against the wind.</p><p class="ql-block">Hold the kite at the bridle point. The bridle point is where the kite’s lines and the flying line meet.</p><p class="ql-block">Allow the wind to pick up the kite. If the wind speed is sufficient, it will catch the kite.</p><p class="ql-block">As the kite glides up, pull it back to you slightly with the flying line.</p><p class="ql-block">Keep allowing the kite to glide up while pulling it back gently until it reaches the desired height.</p><p class="ql-block">If you need a helping hand, have someone stand downwind with the kite. As the person releases the kite, the flyer keeps slowly pulling the line toward him or her as the kite climbs</p> <p class="ql-block">As wind moves across the sail of the kite, pressure is created. As air pushes up on the kite, creating this pressure, lift results. It’s as if a hand were pushing the kite up into the air. Once the wind falls, or the “hand” is taken away, the kite falls.</p><p class="ql-block">But that’s not all! Wind passing over the kite also creates pressure. It acts like a vacuum pulling the kite up into the sky.</p><p class="ql-block">The kite is also affected by gravity, which pulls the kite downward to the ground, and drag, or the wind resistance created on the kite’s sail and tail. The kite must have enough lift to overcome both the forces of gravity and drag.</p><p class="ql-block">The thrust, or power, of the wind is also important. In fact, some kites fly better in light winds, whereas others fly better in medium to strong winds.</p><p class="ql-block">Lift, gravity, drag and wind thrusts meet at the center of pressure of the kite, or the tow point. This is where your kite’s bridle should be to ensure a kite flies well.</p>