EESD09H3 Lecture 10: WIND Lecture 10
11 Dec 2019
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Document Summary
Created designs of hang gliders, helicopters, and other flying machines. Provides lift that enables an airplane to rise or a sailboat to move forward. Dominant mode of transportation (trade, military) in the mediterranean. Lateen sail (triangular on a boom) provided more options such as sailing against the wind imported from arab mariners. 13th century onward ships capable of travelling anywhere on earth. Ship of choice for travelling around the world. Ni a and pinta were caravel ships (christopher columbus. Noted for speed (many sails) to compete with new technology (steamers) Used to bring tea back from china in record time (less than 100 days) Alberta clipper (lecture 5) named after these ships small and fast! Moveable boom, typical of lateen sail enables flexibility in sailing in virtually any direction. Combination of sail orientation and keel board dictates boat direction. Oil of its time a wind economy. 19th century, replaced by coal fired steam engine.
