Parachute: Difference between revisions

6 bytes removed ,  2 June 2022
robot: Update article (please report if you notice any mistake or error in this edit)
m (robot: import pages using Special:Import)
 
(robot: Update article (please report if you notice any mistake or error in this edit))
 
Line 22: Line 22:
The earliest evidence for the true parachute dates back to the [[Renaissance]] period.<ref name="Lynn White 1968, 466">{{harnvb|White|1968|p=466}}</ref> The oldest parachute design appears in an anonymous manuscript from 1470s [[Renaissance Italy]] (British Library, Add MS 34113, fol. 200v), showing a free-hanging man clutching a crossbar frame attached to a conical canopy.<ref name="Lynn White 1968, 462f.">{{harnvb|White|1968|pp=462f.}}</ref> As a safety measure, four straps ran from the ends of the rods to a waist belt. The design is a marked improvement over another folio (189v), which depicts a man trying to break the force of his fall using two long cloth streamers fastened to two bars, which he grips with his hands.<ref name="Lynn White 1968, 465">{{harnvb|White|1968|p=465}}</ref> Although the surface area of the parachute design appears to be too small to offer effective air resistance and the wooden base-frame is superfluous and potentially harmful, the basic concept of a working parachute is apparent.<ref name="Lynn White 1968, 465"/>
The earliest evidence for the true parachute dates back to the [[Renaissance]] period.<ref name="Lynn White 1968, 466">{{harnvb|White|1968|p=466}}</ref> The oldest parachute design appears in an anonymous manuscript from 1470s [[Renaissance Italy]] (British Library, Add MS 34113, fol. 200v), showing a free-hanging man clutching a crossbar frame attached to a conical canopy.<ref name="Lynn White 1968, 462f.">{{harnvb|White|1968|pp=462f.}}</ref> As a safety measure, four straps ran from the ends of the rods to a waist belt. The design is a marked improvement over another folio (189v), which depicts a man trying to break the force of his fall using two long cloth streamers fastened to two bars, which he grips with his hands.<ref name="Lynn White 1968, 465">{{harnvb|White|1968|p=465}}</ref> Although the surface area of the parachute design appears to be too small to offer effective air resistance and the wooden base-frame is superfluous and potentially harmful, the basic concept of a working parachute is apparent.<ref name="Lynn White 1968, 465"/>


Shortly after, a more sophisticated parachute was sketched by the [[polymath]] [[Leonardo da Vinci]] in his ''[[Codex Atlanticus]]'' (fol. 381v) dated to ca. 1485.<ref name="Lynn White 1968, 462f."/> Here, the scale of the parachute is in a more favorable proportion to the weight of the jumper. Leonardo's canopy was held open by a square wooden frame, which alters the shape of the parachute from conical to pyramidal.<ref name="Lynn White 1968, 465"/> It is not known whether the Italian inventor was influenced by the earlier design, but he may have learned about the idea through the intensive oral communication among [[Renaissance technology|artist-engineers of the time]].<ref name="Lynn White 1968, 465f.">{{harnvb|White|1968|pp=465f.}}</ref><ref>{{citation|surname1=[[Marc van den Broek]]|title=Leonardo da Vinci Spirits of Invention. A Search for Traces |publisher=A.TE.M. |location=Hamburg|isbn=978-3-00-063700-1|date=2019|language=en}}</ref> The feasibility of Leonardo's pyramidal design was successfully tested in 2000 by [[British people|Briton]] [[Adrian Nicholas]] and again in 2008 by the Swiss skydiver Olivier Vietti-Teppa.<ref>BBC: [http://news.bbc.co.uk/2/hi/science/nature/808246.stm Da Vinci's Parachute Flies] (2000); FoxNews: [http://www.foxnews.com/story/0,2933,352917,00.html Swiss Man Safely Uses Leonardo da Vinci Parachute] {{Webarchive|url=https://web.archive.org/web/20100421072140/http://www.foxnews.com/story/0,2933,352917,00.html |date=April 21, 2010 }} (2008)</ref> According to the historian of technology [[Lynn White]], these conical and pyramidal designs, much more elaborate than early artistic jumps with rigid [[parasol]]s in Asia, mark the origin of "the parachute as we know it."<ref name="Lynn White 1968, 466"/>
Shortly after, a more sophisticated parachute was sketched by the [[polymath]] [[Leonardo da Vinci]] in his ''[[Codex Atlanticus]]'' (fol. 381v) dated to ca. 1485.<ref name="Lynn White 1968, 462f."/> Here, the scale of the parachute is in a more favorable proportion to the weight of the jumper. A square wooden frame, which alters the shape of the parachute from conical to pyramidal, held open Leonardo's canopy.<ref name="Lynn White 1968, 465"/> It is not known whether the Italian inventor was influenced by the earlier design, but he may have learned about the idea through the intensive oral communication among [[Renaissance technology|artist-engineers of the time]].<ref name="Lynn White 1968, 465f.">{{harnvb|White|1968|pp=465f.}}</ref><ref>{{citation|surname1=[[Marc van den Broek]]|title=Leonardo da Vinci Spirits of Invention. A Search for Traces |publisher=A.TE.M. |location=Hamburg|isbn=978-3-00-063700-1|date=2019|language=en}}</ref> The feasibility of Leonardo's pyramidal design was successfully tested in 2000 by [[British people|Briton]] [[Adrian Nicholas]] and again in 2008 by the Swiss skydiver Olivier Vietti-Teppa.<ref>BBC: [http://news.bbc.co.uk/2/hi/science/nature/808246.stm Da Vinci's Parachute Flies] (2000); FoxNews: [http://www.foxnews.com/story/0,2933,352917,00.html Swiss Man Safely Uses Leonardo da Vinci Parachute] {{Webarchive|url=https://web.archive.org/web/20100421072140/http://www.foxnews.com/story/0,2933,352917,00.html |date=April 21, 2010 }} (2008)</ref> According to the historian of technology [[Lynn White]], these conical and pyramidal designs, much more elaborate than early artistic jumps with rigid [[parasol]]s in Asia, mark the origin of "the parachute as we know it."<ref name="Lynn White 1968, 466"/>
[[File:Homo Volans.jpg|thumb|upright|[[Fausto Veranzio]]'s parachute design,  titled ''Homo Volans'' ("Flying Man"), from his ''Machinae Novae'' ("New Contraptions", published in 1615 or 1616)]]
[[File:Homo Volans.jpg|thumb|upright|[[Fausto Veranzio]]'s parachute design,  titled ''Homo Volans'' ("Flying Man"), from his ''Machinae Novae'' ("New Contraptions", published in 1615 or 1616)]]