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Rodger bacon a monk in England suggest that a person could sit in the middle of an engine for flying which would move artificial wings made to beat the air. It is important because it is an experimental science
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Leonardo De Vinci of Italy drew plans and picture of human powered flights. The plans included ornithoptor that attached to the pilots back and drove two large flaps and a simple helicopter. This happened in the 1500. The development was they could actually fly and get of the ground. It is important because people could fly.
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joseph and jacques tested their first hot air ballon through 8 km across Paris. they discovered that ballon made of line bag filled with fire heated air bag is enough to lift 2 people. This is important because people can go on hot air ballon now.
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The American wright flyer made the first successful powered flight. It is important because they flew the first successful powered flight.