Editing Flight (section)

=== Aviation ===
{{Main|History of aviation}}
[[George Cayley]] studied flight scientifically in the first half of the 19th century,<ref>{{cite web
| title       = Sir George Cayley 
| url         = http://www.flyingmachines.org/cayl.html
| publisher   = Flyingmachines.org
| access-date  = 27 August 2019
| quote       = Sir George Cayley is one of the most important people in the history of aeronautics. Many consider him the first true scientific aerial investigator and the first person to understand the underlying principles and forces of flight.}}</ref><ref name="ctie">{{cite web
| title       = The Pioneers: Aviation and Airmodelling
| url         = http://www.ctie.monash.edu.au/hargrave/cayley.html
| access-date  =26 July 2009
| quote       = Sir George Cayley, is sometimes called the 'Father of Aviation'. A pioneer in his field, he is credited with the first major breakthrough in heavier-than-air flight. He was the first to identify the four aerodynamic forces of flight – weight, lift, drag, and thrust – and their relationship and also the first to build a successful human-carrying glider.}}</ref><ref>{{cite web
 |title       = U.S. Centennial of Flight Commission – Sir George Cayley
 |url         = http://www.centennialofflight.gov/essay/Prehistory/Cayley/PH2.htm
 |access-date  = 10 September 2008
 |quote       = Sir George Cayley, born in 1773, is sometimes called the Father of Aviation. A pioneer in his field, Cayley literally has two great spurts of aeronautical creativity, separated by years during which he did little with the subject. He was the first to identify the four aerodynamic forces of flight – weight, lift, drag, and thrust and their relationship. He was also the first to build a successful human-carrying glider. Cayley described many of the concepts and elements of the modern aeroplane and was the first to understand and explain in engineering terms the concepts of lift and thrust.
 |url-status     = dead
 |archive-url  = https://web.archive.org/web/20080920052758/http://centennialofflight.gov/essay/Prehistory/Cayley/PH2.htm
 |archive-date = 20 September 2008
}}</ref> and in the second half of the 19th century [[Otto Lilienthal]] made over 200 gliding flights and was also one of the first to understand flight scientifically. His work was replicated and extended by the [[Wright brothers]] who made gliding flights and finally the first controlled and extended, manned powered flights.<ref>[http://www.shapell.org/btl.aspx?2972360 "Orville Wright's Personal Letters on Aviation."] {{Webarchive|url=https://web.archive.org/web/20120611224943/http://www.shapell.org/btl.aspx?2972360 |date=2012-06-11 }} ''Shapell Manuscript Foundation'', (Chicago), 2012.</ref>