Extending a leading edge slat will have what effect on the angle of attack of a wing?
- Increase the angle of attack.
- Decrease the angle of attack.
- No effect on angle of attack.
Explanation
Extending a leading-edge slat opens a slot that re-energises the boundary layer and smooths the flow over the main aerofoil, lowering the suction peak and effective angle of attack seen by the wing for a given lift. This delays separation and lets the wing reach a much higher stalling angle before the airflow breaks away.
Tommibona asking:
The effect of the slat is to prolong the lift curve by delaying the
stall until a higher angle of attack. how does it possible that the angle of attack decreases?
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