EESA09H3 Lecture 10: Wind Power
8 Aug 2018
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Document Summary
Greek gods in mythology described the power of wind. The god icarus flew too close to the sun and got burned. Leonardo da vinci (a 15th century artist) created designs of hang gliders, helicopters, or other flying machines. Sir george cayley piloted the first hang glider in 1853. Otto lilienthal built 2000 gliders in the 19th century and eventually died in a glider crash. The wright brothers from the us flew the first airplane in december 17, 1903. Sailing used to be a dominant mode of transportation in the mediterranean and china for trade and military purposes. Ships were used by norse sailors who relied on polar easterlies and mid latitude westerlies. Christopher columbus relied on the trade winds and the westerlies. Bernoulli"s principle : the pressure gradient force gives airplanes or other flying objects such as birds a lift underneath the wind. The speed of the wind above and below the wing is different causing a difference in pressure.
