| 1. | The sum of friction drag and pressure ( form ) drag is called viscous drag.
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| 2. | In such situations, the airfoil is stalled and has higher pressure drag than friction drag.
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| 3. | In lighter air, it will cause friction drag.
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| 4. | This effect might also be used to reduce skin friction drag on aircraft wings by 40 %.
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| 5. | The total of the skin-friction drag and the viscosity-related pressure drag is usually called the profile drag.
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| 6. | This suggests that the total parasitic drag observed in turbulent flow is minimally impacted by skin friction drag.
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| 7. | Over most of the surface of most airfoils, the boundary layer is naturally turbulent, which increases skin-friction drag.
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| 8. | The air's viscosity resists the shearing, giving rise to a shear stress at the airfoil's surface called skin-friction drag.
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| 9. | Wave drag is one of the forms of drag created by swimmers, the others being pressure drag and friction drag.
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| 10. | The friction drag force, which is a tangential force on the aircraft surface, depends substantially on boundary layer configuration and viscosity.
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