Wing god big bird

Scientific enlightenment:

Man's dream of flying began by imitating the flight of birds. How to fly?The first thing that comes to mind is the imitation of birds. The flying thunderbolt in the legend of god has birdlike wings. In the stone carvings of some ancient murals at home and abroad, there are also many winged figures, such as the feather man in dunhuang grottoes and the two-winged and four-winged flying man in the stone chamber of the wu family of the eastern han dynasty unearthed in jiaxiang, shandong province. In history, there is no lack of practice to imitate the flight of birds. Legend has it that4000Years ago, yu wu, with a bamboo hat in her hand, jumped from the roof of the burning warehouse and escaped the persecution of her stepmother and younger brother. In the biography of wang mang, a book of the former han dynasty, it is reported that in order to resist the invasion of the xiongnu, wang mang extensively recruited people with unique skills. One of the young men who came forward was a hunter. He had made a pair of large wings out of bird feathers and tied them to his arms. He also had feathers on his head and body. Stretching out his arms and wings, he glided down from a height like an eagle, flying hundreds of paces. In foreign countries, there are also many people imitate birds flying. Such as600Years ago a Turk, flying in a cape supported by a frame, was killed when the frame broke.1503Italian Dante, who made wings out of bird feathers; 1507The British arrived in nineteen seventy-two-Finch designed sketches of human flapping wings, and damien, who also used chicken feathers to make wings for flight, failed.l742The Frenchman barkerville, will4He tried to fly over the Seine from the roof of a hotel in Paris, but he fell in the middle of the river and broke his leg by crashing into a boat. Others, less reckless and impetuous, wanted to imitate bird flight, but first studied how it works. During the eastern jin dynasty, ge hong pointed out in his book \"mupu zi\" that the eagle could hover by spreading its wings and fly higher and higher with the help of the updraft. The practice and research of imitating the flight of birds have proved that humans cannot fly into the air with the power of their muscles. People don't have the streamlined heads of birds, and their bodies are too big and heavy, their chests and hearts too small. High flying vulture, heart for weight8%A hummingbird that flies fast and nimbly22%. In this proportion, the length of a man's chest should be1.8Meters above, the person's heartbeat is too slow, generally for70time/In about a minute, the sparrow's heart beats every minute as it flies800Times. However, the way birds fly, the principle of human flight to the sky has enlightenment significance, human must learn from the birds, the use of mechanical wings of the machine, the weight of the body, can be lifted into the air.

Scientific production:

1. Assemble flapping wing movable support.

2. Assemble bird bodies.   

3. Install a bird power rubber band.

4. Install the flapping wing bracket on the bird body pole.

5. Adjust and check whether the installation of each part is accurate.   

6, stick on the wings of the bird, the bird body of the paper.

7. Tighten the rubber band and let go.

Scientific principles:

This is a copy of the flight principle of a bird made of a paper bird, it is powered by a rubber band, driven by a small crankshaft rotation, due to the rotation of the crankshaft to fly up and down, thus driving a paper bird flight. Because of the light weight of the paper birds, and the rubber band energy, and the wings of the flap enough to make the birds fly into the sky, and can glide.

Scientific inquiry:

1. What is the most important part of making a bird?

2. What is the most important factor for flying birds?