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When landing the glider, the pilot needs to be able to control the glide path (the rate of descent relative to distance traveled) in order to bring the glider down in the right location. The pilot has to be able to reduce the amount of lift produced by the wings without changing the speed or attitude of the glider. He does this by deploying spoilers on each wing. The spoilers disrupt the airflow over the wing, drastically reducing the lift it produces and also increasing the drag.
![]() Note the raised spoiler on the wing during landing |
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On July 23, 1983, a brand new Air Canada Boeing 767 was forced to glide to a landing after running out of fuel in midair. The plane essentially became an enormous glider. Even descending at a paltry glide ratio of about 11:1, the pilots managed to land safely at an abandoned airport in Gimli, Canada. The story of why the plane ran out of fuel is a long one, but it was partly due to an error in confusing English units with metric units.
If you are interested in learning more about this incident, you can read more by searching the Web for "Gimli glider" or by clicking here. |
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