2006-12-09 05:17:59 · 6 answers · asked by Sinz 1 in Travel ➔ Air Travel
For the lift-up of the Air-plane.
2006-12-09 05:20:34 · answer #1 · answered by Anonymous · 0⤊ 1⤋
Given the shape of a wing curved on the top and flat on the bottom.
Imagine two air molcules at the leading edge of the wing. One takes the longer high road over the top while the other takes the shorter road alon the bottom.
Both molecules start at the same time and will travel along the wing and meet at the same time at the trailing edge both taking the same amount of time to travel from leading edge to trailing edge.
Since the travel time is the same for both the only diference is distance traveled then the molecule traveling the longer distance of the top of the wing must travel faster than the one going along the bottom of the wing.
Air which moves over the top accelerates to a faster speed. As it accelerates the air molecules spread apart. You can visualize this with a line of cars traveling at 30 MPH on a highway on ramp. As each car enters the highway and stomps on the gas it travels faster and further away before the car behind it has a chance to enter the high way and accelerate. The result is the cars are all going faster but are now seperated by a greater distance between them.
The air does the same thing accelerating over the top of the and having a greater distance between them. Since the air molecules are now further apart the air is now at a lower pressure.
Low pressure on the top and higher pressure on the bottom of the wing generates lift....
2006-12-10 00:05:43 · answer #2 · answered by MarkG 7 · 0⤊ 0⤋
This entry contributed by Dana Romero
Portions of this entry contributed by Leonardo Motta
For horizontal fluid flow, an increase in the velocity of flow will result in a decrease in the static pressure. The equation describing this effect is known as Bernoulli's law. The most practical example of this is in the action of an airfoil. The shape of an airplane wing is such that air flowing over the top of the wing must travel faster than the air flowing under the wing, and so there is less pressure on the top than on the bottom, resulting in lift.
2006-12-09 13:27:29 · answer #3 · answered by lenshure 2 · 0⤊ 0⤋
Actually it is just the opposite. Air travels faster under the wing because under the wing is flat. Air traveling over the top of the wing is slower due to the rounded shape of the wing. This causes a difference in air pressure thus it creates lift.
2006-12-09 13:23:06 · answer #4 · answered by Jeffrey 7 · 1⤊ 0⤋
The wings are designed with a longer surface to travel on the top than the underside, meaning the air is spread thinner to cover the distance. The thinner air results in a lower air pressure, which acts to "pull" the wing up to balance the pressure differential.
2006-12-09 13:23:27 · answer #5 · answered by Captain Reynolds 4 · 1⤊ 0⤋
the shape of the wings...
2006-12-09 13:27:32 · answer #6 · answered by J 3 · 0⤊ 0⤋