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Aircrafts wings may be swept back, or occasionally forward, for a variety of reasons. A small degree of sweep is sometimes used to adjust the center of lift when the wing cannot be attached in the ideal position for some reason, such as a pilot's visibility from the cockpit. The shock wave boundary of a supersonic aircraft is stretched across the nose and wing leading edge to the aircraft. The swept wings allows all parts of the aircraft that create lift to remain in sonic flow, therebyfatcat:spi4ytmibnb5deuq4gx2cjq5kq