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Aeronautical engineering deals with aircraft design while aerospace engineering is a more modern term that expands the reach of the discipline by including spacecraft design.[13] Its origins can be traced back to the aviation pioneers around the start of the 20th century although the work of Sir George Cayley has recently been dated as being from the last decade of the 18th century. Early knowledge of aeronautical engineering was largely empirical with some concepts and skills imported from other branches of engineering.[14].

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