3 ms·

Well, actually the Bernouilli effect has its part, and so has the Coanda effect; however most of these explanation concentrate on an artificial setup, without t

by wazoox 16y ago

Well, actually the Bernouilli effect has its part, and so has the Coanda effect; however most of these explanation concentrate on an artificial setup, without taking in to account the actual angle that the wing makes with the air stream. When you learn to fly, you're first told that the angle of attack is the most important parameter to get lift. See the wikipedia page : http://en.wikipedia.org/wiki/Angle_of_attack http://en.wikipedia.org/wiki/Angle_of_attack The Bernouilli and Coanda effects, in most flight configurations are of relatively minor importance, except on some particular aircrafts.

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 ago
  Downward 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.
9ec4c12949a4f3 16y ago
I failed a test in highschool because I said bernouilli didn't make the planes fly. I backed it up with research. Encarta had this video that even stated "bernouilli is just a side-effect of flight, it isn't responsible"
- araneae 16y ago
  Failed it? Did it only have one question on it?
  - 9ec4c12949a4f3 16y ago
    I brought out my lawyers (parents) on it. Teacher felt he should fail me on the science test because I refused to accept what was in the book. The agreement was that part wouldn't be marked on my paper only, and telling other students about what I found in encarta and some other stuff it wasn't going to happen. As a side note, it wasn't actually highschool, this was grade 7.

by wazoox 16y ago

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 ago
Downward 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.

9ec4c12949a4f3 16y ago

I failed a test in highschool because I said bernouilli didn't make the planes fly. I backed it up with research. Encarta had this video that even stated "bernouilli is just a side-effect of flight, it isn't responsible"

araneae 16y ago
Failed it? Did it only have one question on it?
- 9ec4c12949a4f3 16y ago
  I brought out my lawyers (parents) on it. Teacher felt he should fail me on the science test because I refused to accept what was in the book. The agreement was that part wouldn't be marked on my paper only, and telling other students about what I found in encarta and some other stuff it wasn't going to happen. As a side note, it wasn't actually highschool, this was grade 7.