Editing Ski jumping (section)

=== Hills ===
{{main|Ski jumping hill}}

[[Image:Ski jumping hill profile.svg|thumb|upright=1.4|Model of a ski jumping hill. {{nowrap|A-B – point of departure}}; {{nowrap|t – take-off zone}}; {{nowrap|HS – total hill length}}; {{nowrap|P-L – landing area}}; {{nowrap|K – K-point}}]]
A ski jumping hill is typically built on a steep natural slope. It consists of the jumping ramp (''in-run''), take-off table, and a landing hill. Competitors glide down from a common point at the top of the in-run, achieving considerable speeds at the take-off table, where they take off, carried by their own momentum. While airborne, they maintain an aerodynamic position with their bodies and skis, which allows them to maximise the length of their jump. The landing slope is constructed so that the jumper's trajectory is near-parallel with it, and the athlete's relative height to the ground is gradually lost, allowing for a gentle and safe landing. The landing space is followed by an ''out-run'', a substantial flat or counter-inclined area that permits the skier to safely slow down.<ref>{{cite web|url=http://www.fis-ski.com/mm/Document/documentlibrary/Skijumping/03/20/22/StandardsfortheConstructionofJumpingHills2012_english_English.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://www.fis-ski.com/mm/Document/documentlibrary/Skijumping/03/20/22/StandardsfortheConstructionofJumpingHills2012_english_English.pdf |archive-date=2022-10-09 |url-status=live |title=Standards for the Construction of Jumping Hills - 2012 | publisher=[[International Ski Federation]] |access-date=14 March 2017}}</ref> The out-run area is fenced and surrounded by a public auditorium.

[[File:Nordic World Ski Championships 2017-02-26 (33181155841).jpg|thumb|The [[Salpausselkä (ski jump)|Salpausselkä]] ski jumping hill in [[Lahti]], Finland]]
The slopes are classified according to the distance that the competitors travel in the air, between the end of the table and the landing. Each hill has a [[construction point]] (''K-point''), which serves as a "target" that the competitors should reach. The classification of the hills are as follows:<ref name="rulesFIS">{{cite web |url=http://www.fis-ski.com/mm/Document/documentlibrary/Skijumping/03/19/96/ICR_JP_2012_Final_English.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://www.fis-ski.com/mm/Document/documentlibrary/Skijumping/03/19/96/ICR_JP_2012_Final_English.pdf |archive-date=2022-10-09 |url-status=live |title=THE INTERNATIONAL SKI COMPETITION RULES (ICR)|publisher=[[International Ski Federation]] |access-date=14 March 2017}}</ref>

{|class=wikitable
! Class !! Construction point !! [[Hill size]]
|-
| Small hill || to 45 meters || to 49 meters
|-
| Medium hill || 45–74 m || 50–84 m
|-
| Normal hill || 75–99 m || 85–109 m
|-
| Large hill || 100–130 m ||  110–149 m
|-
| Giant hill || 131–169 m ||  150–184 m
|-
| [[Ski flying]] hill || over 170 m || over 185 m
|}