| 21. | The more wave drag is created, the more energy a swimmer must put out to make progress through the water.
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| 22. | Wave drag is a sudden rise in drag on the aircraft, caused by air building up in front of it.
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| 23. | However, this would limit the design to slower speeds below about Mach 0.7 ( see wave drag ).
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| 24. | It calculates the wave drag on a transonic or supersonic aircraft . It just happens to have been written in the 50s.
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| 25. | All propellers lose efficiency at high speed, due to an effect known as wave drag which occurs just below supersonic speeds.
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| 26. | Although butterfly is very compatible with diving, the resulting reduction in wave drag does not lead to an overall reduction of drag.
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| 27. | Supersonic airflow over the upper surface of the traditional airfoil induced excessive wave drag and a form of stability loss called Mach tuck.
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| 28. | This process is far more complicated than it sounds, due to the resistance the advancing wavefront encounters ( similar to wave drag ).
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| 29. | Similarly, for a fixed volume, the shape for minimum wave drag is the "'Von Karman Ogive " '.
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| 30. | A supercritical airfoil is an airfoil designed, primarily, to delay the onset of wave drag on aircraft in the transonic speed range.
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