How does an Aeroplane gain hights and decends? show with graphs?

Answer 1

as the wings move throught the air low air preassure is generated at the top surface of the wings - this makes the wings . . . . you know what?

Piss off and figure it out for yourself you lazy crackhead

Answer 2

You make your question sound so much like a homework question. Especially the "show graph" portion.

Planes stay in the air because the air flow over the wings cause a pressure difference between the top of the wing and the bottom.

The pressure is much less on the top and that pulls the wing (therefore, the rest of the plane) upwards, gravity pulls downwards. When the two forces are balanced, the plane stays at the same level.

The difference in pressure depends on the speed. For a given wing configuation and angle of attack, the faster you go, the more pressure difference = more lift. Gravity stays the same, so lift wins. Go faster = the plane climbs.

Slower = less pressure difference = less lift. Gravity stays the same so gravity wins; the plane descends.

If you want to increase lift without changing speed, you can make the wing bigger (this is done on passenger jets for takeoff and just before landing so that they can land at slower speeds = need less runway).

You can also change the wing configuration to change the effect of airflow (this changes the pressure difference). Some combat planes have normal wing configuation for takeoff and landing, then a "delta" configuration for fast flight. Called: variable geometry.

Answer 3

Sorry no graph.

It has to do with the shape of the wing. Airfoil. The air travels farther (thus faster) over the top side of the wing causing a difference in pressure and thus creating lift. The propeller had the same shape and used the same principle to move the plane forward. To go up or down you simple adjust the angle and speed of the plane.

A sailboat works the same way. You don't get the most speed from a boat with the wind directly behind you (running) but at an anfle so the wind goes accross the cupped (airfoil) sail. Thus air going farther and faster over the front of the sail. Thus the fast boats are always tilted way over.

Answer 4

When lift is greater than weight, the airplane goes up. Vice versa, the airplane goes down. You can look up the NACA cl (coefficient of lift) vs AOA (angle of attack) on the internet. Lift can be defined by the following equeation:

L = 1/2 * rho * v^2 * cl

Where rho is the density of air and v is the relative velocity of the airflow to the wing.

The cl can be determined for subsonic flow by the lifting line theory. Supersonically is a little more complicated than I want to get into on Yahoo!.

Answer 5

An Airplane gains height by producing more lift than it weighs. An airplane can produce more lift by going faster or by increasing it's angle of attack. The angle of attack is how much the front of the wing points up. The more it points up the more lift until the aircraft reaches what called stall. After that anymore up angle would cause the plane to stop flying altogether.

Similarly to go done you decrease speed or decrease the angle of attack.