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Simply more air pressure under the wing than over it.
If you look at an aeroplane wing it has a flat underside and then a curved top. Imagine two bits of air, both are going at the same speed when they get to the wing one has to go over the top to get to the other side (the long way) the other goes underneath (the direct way). This means that more bits of air can go under the wing in any given time than over the top. The fact that more air can then go under increases the pressure under the wing so that the whole plane is experiencing a higher pressure underneath and takes off. This is known as the aerofoil effect.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoBy the contour of the wings. as ground speed increases the air will pass under and over a wing. by design the differential pressure of air flow from under to over the wing will cause lift in the up direction. inverting the wing dynamics will have the opposed effect keeping it on the ground.
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What is ground roll?
The distance the aircraft travels on the ground before lifting off, or the same when landing.
What are the applications of an aircraft landing gear system?
Uhh...keeping airplanes from lying on the ground when they're not flying?
What is the difference between radar identification and radar contact?
Radar identified refers to your aircraft's position presented on a ground based radar screen and by using a squawk code in the aircraft which corresponds to the ground based station your aircraft is then identified. Radar control refers to an aircraft already identified on the radar screen and flying in controlled airspace under an IFR flight plan and the ground based station would provide heading, speed and altitude you should fly at.
How much fuel is required to get a 747 off the ground?
1 milerlitre
What is the relationship between aircraft wing and runway length?
Pretty much the more efficient the wing design is, the less runway you will need.The wing of an aircraft is essential because it is tasked with the generation of lift, the force required to both get an aircraft off the ground and the keep it airborne. During take-off, the former is the primary objective of the wing. The better the wing is at generating lift, the faster the aircraft will get off the ground. Accordingly, the less runway length it will use.--------------------------------------------------------------------------------------------There are a lot of factors that come in to play when it comes to designing a wing, and that is where it gets complicated. Such questions as the following are asked: will the wing be swept or un-swept? Long & slender or short & stubby? Winglets or no winglets? What kind of airfoil? etc. These issues are all addressed during the design process.Ideally, a wing with an elliptical lift distribution is the most aerodynamically efficient when it comes to generating lift. To attain this, the wing is pretty much shaped like an ellipse (a great historical example is the British Spitfire of WWII). However, elliptical wings are very hard to manufacture (which also leads to them being more expensive than your standard rectangular wing). Accordingly, most aircraft incorporate tapered wings which provide a similar effect to elliptical wings (thought not exactly the same) but are much easier and less expensive to manufacture.
How fast does it fly on lift off?
The aircraft has to go 100 mph or more (depends on aircraft) to get off the ground in time.
Why does the rudder on the tail of an aircraft tilt to one side when the aircraft is on the ground and is switched off?
it keeps it balanced
What is ground roll?
The distance the aircraft travels on the ground before lifting off, or the same when landing.
What does the weight of the airplane have to do with the lift of it?
The weight of an aircraft counteracts the lift produced by an aircraft. The heavier an aircraft weighs the greater the lift needed to get off the ground.
What do you call the guys who signal to aircraft prior to take off?
The person on the ground in front of the aircraft is called a Marshaller, the person in the control tower is an Air Traffic Controller (or a Ground Movement Controller)
What is taxing of aircraft?
Movement of an aircraft on the ground.
How space aircraft work?
well when they lift off they have this mass of fire expolding the ground which it makes it fly.
Why is the back of the airplane narrow and higher off ground then the front of the airplane?
This is to allow the airplane to rotate when it is taking off. (Rotating is when the pilot pulls back, raises the nose of the aircraft, and the aircraft rises into the air). If the aircraft did not have this raised tail-end, a "tail-strike" would happen, which damages the aircraft.
Does an airplane take off into the wind or with the wind?
If conditions (airport layout and traffic conditions) allow aircraft take off and land against the wind (headwind). This way the aircraft can take off or approach the runway at a lower ground speed.
How many ground miles can you see an aircraft contrail on the horizon?
Depends on the height of the aircraft above ground.
How long does it take an airplane to get off the ground?
Depends on the aircraft, and the velocity of the air over the wings that produces enough lift to get the aircraft into the air. For aircraft that are STOL capable (Short Take Off and Landing) this time will be short, but ultimately it depends on the wind conditions, and the thrust of the aircraft. VTOL (Vertical Take Off and Landing) aircraft can take off instantaneously. There are too many variables to give a short answer, as stated above, but as an example, a fully loaded modern day commercial airliner like the Boeing 767-400 might have a take-off run of 9000' to 9500' before the main landing gear actually lifted off the ground.
Why is there no lift on a aircraft on the ground?
There IS lift because there is wind. It just doesn't make the plane take off (although it might - search youtube to see light and not that light aircraft examples!)
