To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

From Wikipedia, the free encyclopedia

Ridge lift at the Torrey Pines Gliderport in San Diego, CA
Ridge lift at the Torrey Pines Gliderport in San Diego, CA

Ridge lift (or slope lift) is created when a wind strikes an obstacle, usually a mountain ridge or cliff, that is large and steep enough to deflect the wind upward.

If the wind is strong enough, the ridge lift provides enough upward force for gliders, hang gliders, paragliders and birds to stay airborne for long periods or travel great distances by 'slope soaring'. Although unpowered aircraft are usually descending through the air, they will climb if the surrounding air is rising faster than their sink rates. Model glider enthusiasts refer to this technique as "slope gliding" or "sloping".

Orville Wright used ridge lift, setting a duration record of 11 minutes in 1911. However the sport of soaring started in Germany after the First World War. In 1921, Dr. Wolfgang Klemperer broke the Wright Brothers’ 1911 soaring duration record with a flight of 13 minutes.[1] In 1922, Arthur Martens became the first glider pilot to use an updraft rising along a mountain slope to stay aloft for a lengthy period, with a flight over an hour.[2]

Basic requirements

A Scimitar glider ridge soaring in Lock Haven, Pennsylvania USA
A Scimitar glider ridge soaring in Lock Haven, Pennsylvania USA

Ridge lift is generated when the wind blows against a hill, ridge, escarpment or ocean wave, causing the air to rise. In meteorology this is known as orographic lift. The wind creates a region of rising air directly above the slope, which may extend some distance upwards and outwards from its face because the airflow follows the upward contour of the hill. However, at near vertical cliffs, there is usually an area of turbulence with descending air near the base of the cliff. Downwind of the hill, lee waves can form; these are also used by glider pilots to gain height, but this should not be confused with slope lift.

Near slopes rather than vertical cliffs, the strongest lift is often to be found in a flight path that intersects with an imaginary line emerging at right angles from the slope.

Long mountain ranges such as those found in Ridge-and-valley Appalachians in the United States, New Zealand, and Chile have been used by glider pilots to fly in excess of a thousand kilometers in a single flight. Birds, such as many seabirds (in particular albatross) and raptors, also use slopes in this way.

See also

Diagram of a slope with the zone of rising air in pale green
Diagram of a slope with the zone of rising air in pale green

References

External links

This page was last edited on 25 April 2020, at 06:12
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.