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| 653 | 653 | |
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| 654 | 654 | Vortex generators are small tabs that protrude from the wing surface and create tiny vortices that mix high-energy air from outside the boundary layer into the slower boundary layer flow near the surface. This energised boundary layer can resist adverse pressure gradients more effectively, delaying flow separation and improving control effectiveness at high angles of attack. They trade a small increase in skin friction for a significant delay in stall onset and better aileron authority near the stall. |
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| 655 | 655 | |
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| 656 | | -### Q36: The lift formula ^t80q36 |
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| 656 | +### Q36: Which of the following factors does a pilot directly control that affects lift? ^t80q36 |
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| 657 | 657 | |
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| 658 | 658 | [DE](../SPL%20Exam%20Questions%20DE/80%20-%20Grundlagen%20des%20Fliegens.md#^t80q36) ยท [FR](../SPL%20Exam%20Questions%20FR/80%20-%20Principes%20du%20vol.md#^t80q36) |
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| 659 | 659 | |
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