how the shape of airplanes wings helps to create unbalanced force on the wing?

Answer 1

Quite simple

Curvature of the wing means it takes longer for the air to flow over one side than the other.

This creates lift, due to changes in air pressure, which is an unbalanced force

Answer 2

Modern aircraft manufacturers don't have much on Orville and Wilbur.

Today's jet airplanes use the same principles of aerodynamics that the Wright brothers used in 1903 to get the Flyer in the air.

Forces at work

Flight requires two things: Thrust and lift. Thrust is the forward motion provided by a propeller or jet engine. (A propeller, by the way, uses the same principles discussed below to create lift, but it uses that lift to move the plane forward instead of up.)

Two forces work against flight: Drag and gravity.

Lift

Lift is a lot trickier. In fact it is very controversial and often poorly explained and, in many textbooks, flat wrong. I know, because some readers informed me that the original version of this story was inaccurate. I've attempted to correct it after researching conflicting "expert" views on all this.

An airplane wing has a special shape, called an airfoil, that bulges more on top than on the bottom. (This drawing is exaggerated to make the point.) That shape aids in flight, but is not the key. If this were all there were too it, then how could some planes fly upside-down?

When air meets the wing, it splits into two streams, top and bottom. You'll often hear that the two streams meet up again in the back, as depicted here, because the air passing over the top has to travel farther than the air going underneath, so it is forced to move faster. But in fact, parcels of air do not join back up in any uniform manner.

Faster-moving air has less pressure (this is often called the Bernoulli principle). So the area above the wing is often said to have less pressure than the area below the wing, creating lift. Again, the reality is more complex, and Newton's laws are typically preferred over the Bernoulli principle to explain lift. The Newtonian idea is this: Air flowing over the wing is ultimately deflected downward by the angle of the wing, and Newton said there has to be an equal and opposite reaction, so the wing is forced upward.

If you're about fed up, rest assured that even engineers still argue over the details of how all this works and what terms to use.

Answer 3

The shape of the leading edge of the wing creates a high and a low pressure along the top and bottom of the wing, thus creating lift.

Answer 4

I was always taught that if you increase velocity, you decrease pressure.
To prove the theory, hold a strip of paper, 4" wide and 11" long between your thumb and forefinger. Bring your hand up next to your lips and blow air over the top of the paper. Watch what happens and you have your answer.

Answer 5

updraft and down-draft