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4171
Test data indicate that ice, snow, or frost having a thickness and roughness similar to medium or coarse sandpaper on the leading edge and upper surface of a wing can
| | A) reduce lift by as much as 50 percent and increase drag by as much as 50 percent. |
| * | B) reduce lift by as much as 30 percent and increase drag by 40 percent. |
| | C) increase drag and reduce lift by as much as 25 percent. |
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