Warm-up video: 

History of Aviation

Warm-up listening "Dream of Flying"

Script:

From the beginning of time humans have watched the beautiful flight of birds and wished they too could fly. For thousands of years human flight was only a dream.Humans did not understand what made flight possible. Several times in history people tried to copy the flight of birds But this too was only a dream.. Any attempt to copy the flight of birds always ended in failure. 

But failure did not stop people from attempting to fly. A good example was an English religious worker in the eleventh century named Eilmer of Malmesbury. He put large wings on his hands and feet that permitted him to "fly"from the top of a church to the ground below. But he had no method of controlling his flight. When he landed, he broke both of his legs.

In the year twelve-seventy, Italian explorer Marco Polo traveled through much ofChina. He wrote that he had seen a man tied to a device made from paper, clothand wood that was lifted by wind power.

This device is called a kite. Children and adults often fly kites on windy days. But this was not really flying. A person who rode a kite had no control. And a rope held the kite to the ground.