Editing Airship (section)

===Airship===
During the pioneer years of aeronautics, terms such as "airship", "air-ship", "air ship" and "ship of the air" meant any kind of navigable or dirigible flying machine.<ref>[http://texashistory.unt.edu/ark:/67531/metapth172915/ US patent 467069] "Air-ship" referring to a compound aerostat/rotorcraft.</ref><ref>[[Ezekiel Airship]] (1902) [http://www.wright-brothers.org/History_Wing/History_of_the_Airplane/History_of_the_Airplane_Intro/History_of_the_Airplane_Intro.htm wright-brothers.org][http://altereddimensions.net/2012/burrell-cannon-flies-first-airplane altereddimensions.net] "airship" – referring to an HTA aeroplane.</ref><ref>[http://gustavewhitehead.org/news_journalism/1901_-_flying.html The Bridgeport Herald, August 18, 1901] {{webarchive|url=https://web.archive.org/web/20130803021718/http://gustavewhitehead.org/news_journalism/1901_-_flying.html |date=August 3, 2013 }} – "air ship" referring to Whitehead's aeroplane.</ref><ref>Cooley Airship of 1910, also called the Cooley monoplane.[http://www.wright-brothers.org/History_Wing/Aviations_Attic/UFOs/UFOs.htm]{{cite web |title=Round Aircraft Designs |url=http://celticowboy.com/Round%20Aircraft%20Designs.htm |url-status=dead |archive-url=https://web.archive.org/web/20120402075442/http://celticowboy.com/Round%20Aircraft%20Designs.htm |archive-date=2012-04-02 |access-date=2011-09-07}} – a heavier-than-air monoplane.</ref><ref>Frater, A.; ''The Balloon Factory'', Picador (2009), p. 163 – Wright brothers' "airship".</ref><ref>[http://www.technovelgy.com/ct/content.asp?Bnum=879 George Griffith, ''The angel of the Revolution'', 1893] {{webarchive|url=https://web.archive.org/web/20140222154830/http://www.technovelgy.com/ct/content.asp?Bnum=879 |date=2014-02-22 }} – "air-ship", "vessel" referring to a VTOL compound rotorcraft (not clear from the reference if it might be an aerostat hybrid).</ref> In 1919 [[Frederick Handley Page]] was reported as referring to "ships of the air", with smaller passenger types as "air yachts".<ref>[http://paperspast.natlib.govt.nz/cgi-bin/paperspast?a=d&d=AS19190224.2.104 Auckland Star, 24 February 1919] "Ships of the air", "Air yachts" – passenger landplanes large and small</ref> In the 1930s, large intercontinental flying boats were also sometimes referred to as "ships of the air" or "flying-ships".<ref>[http://nla.gov.au/nla.news-article17455790 The Sydney Morning Herald, Monday 11 April 1938] – "ship of the airs", "flying-ship", referring to a large flying-boat.</ref><ref>[http://airandspace.si.edu/exhibitions/america-by-air/online/innovation/innovation16.cfm Smithsonian, America by air] {{Webarchive|url=https://web.archive.org/web/20140118135217/http://airandspace.si.edu/exhibitions/america-by-air/online/innovation/innovation16.cfm |date=2014-01-18 }} "Ships of the Air" referring to Pan Am's Boeing Clipper flying-boat fleet.</ref> Nowadays the term "airship" is used only for powered, dirigible balloons, with sub-types being classified as rigid, semi-rigid or non-rigid.<ref name="ege" /> Semi-rigid architecture is the more recent, following advances in deformable structures and the exigency of reducing weight and volume of the airships. They have a minimal structure that keeps the shape jointly with overpressure of the gas envelope.<ref>Liao, L., & Pasternak, I. (2009). "A review of airship structural research and development". ''Progress in Aerospace Sciences'', 45(4), 83–96.</ref><ref>{{cite web |url=https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930091277.pdf |title=Inertia Factors of Ellipsoids for Use in Airship Design |first=Louis Bryant Jr.|last=Tuckerman |date=January 1, 1926 |publisher=[[National Advisory Committee for Aeronautics]] |via=ntrs.nasa.gov}}</ref>