Editing Javelin throw (section)

===Javelin redesigns===
{{see also|Timeline of changes in the sport of athletics}}
[[File:Bundesarchiv Bild 183-1984-0513-018, Uwe Hohn.jpg|thumb|[[Uwe Hohn]] (pictured in 1984) holds the "eternal world record" with a throw of 104.80&nbsp;m, as a new type of javelin (less debate of landing spot, less danger of reaching the spectators) was implemented in 1986.]]
On 1 April 1986, the men's javelin ({{convert|800|g|lbs|sigfig=3|lk=on}}) was redesigned by the governing body (the [[IAAF]] Technical Committee). They decided to change the rules for javelin design because of the increasingly frequent flat landings and the resulting discussions and protests when these attempts were declared valid or invalid by competition judges. The world record had also crept up to a potentially dangerous level, {{convert|104.80|m|abbr=on}} by [[Uwe Hohn]]. With throws exceeding 100 metres, it was becoming difficult to safely stage the competition within the confines of a stadium infield. The javelin was redesigned so that the [[centre of gravity]] was moved {{convert|4|cm|abbr=on}} forward. In addition, the surface area in front of centre of gravity was reduced, while the surface area behind the centre of gravity was increased. This had an effect similar to that produced by the feathers on an arrow. The javelin turns into the [[relative wind]]. This relative wind appears to originate from the ground as the javelin descends, thus the javelin turns to face the ground. As the javelin turns into the wind less lift is generated, reducing the flight distance by around 10% but also causing the javelin to stick in the ground more consistently. In 1999, the women's javelin ({{convert|600|g|lbs|sigfig=3}}) was similarly redesigned.<ref>{{cite web|url=http://www.worldofjavelin.com/posts/physics-javelin-designs-whats-the-significance/|title=Physics: Javelin Designs, what's the significance? – World of Javelin|work=worldofjavelin.com|access-date=27 March 2012|archive-url=https://web.archive.org/web/20150402160908/http://www.worldofjavelin.com/posts/physics-javelin-designs-whats-the-significance/|archive-date=2 April 2015|url-status=dead}}</ref>

Modifications that manufacturers made to recover some of the lost distance, by increasing tail drag (using holes, rough paint or dimples), were forbidden at the end of 1991 and performances made using implements with such modifications removed from the record books. [[Seppo Räty]] had achieved a world record of {{convert|96.96|m|abbr=on}} in 1991 with such a design, but this record was nullified.