5 ms·
Consider a steep angle of attack on takeoff. The lower side of the airfoil is more exposed to the onrush of air, and clearly this pushes the airfoil upwards. B
by Isamu 16y ago
Consider a steep angle of attack on takeoff. The lower side of the airfoil is more exposed to the onrush of air, and clearly this pushes the airfoil upwards. But the significance of the Coanda effect is that the air also wraps around the top of the airfoil, adhering to the surface, so that it too exits downward. If it didn't adhere to the surface (which happens in a stall) then you would lose all the downward force of that half of the airflow.
- Retric 16y agoDownward force on a wing reduces lift. A laminar flow over a wing can maintain a lower pressure above the wing than a chaotic flow. The best simple way to think about this is pooring water from a 2 liter bottle. As you tip it over the pressure of the air inside the bottle decreases and new air is pushed into the bottle filling the partial vacume. However, if you tip it to far you get chaotic behavior and the average pressure increases.