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How Gliders Fly

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The lift from the wings pushes the glider up and forward. This lift keeps the glider in the air; unfortunately, as the glider moves though the air, drag slows the glider down. To maintain a constant speed, the glider must therefore fly slightly ‘downhill’. Hence the glider slowly loses height over time. A typical training glider will have a glide ratio of 30:1 (it will lose one unit of height for every thirty it moves forward) while a high performance glider will have a glide ratio of 60:1 or more.
 
''See also: [[Aerofoils and Wings]]''
[https://www.youtube.com/watch?v=vJouxKs7T9c This video] on the CUGC YouTube channel explains this.
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