EESA09H3 Lecture 10: Wind notes for lecture 10 and 11.docx
15 Dec 2012
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Document Summary
Mythical flight of icarus who flew too near to the sun. Leonardo da vinci in 15th century created designs of hang gliders, helicopters and other flying machines. Sir george cayley first piloted the glider in 1853. Otto lilienthal had 2000 glider flights and died in 1896 glider crash. Wright brothers of usa had the first manned flight. Provides lift that enables an airplpane to rise or sailboat to move forward. 90o change in orientation; bernoulli"s principle still applies and lift is horizontal. Dominant mode of transportation in the mediterranean. Lateen sail (triangular on a boom) provided more options such as sailing against the wind imported from arab mariners. 1000ad newfoundland by norse sailors used knorr, cog and polar easterlies, midlatitude westerlies. Christopher columbus in 1492 used carrack, caravel via trade winds and westerlies. 13th century onward, ships capable of travelling anywhere on earth. Noted for speed, perfected by england, used to bring tea back from china.
