How does an aeroplane which weighs over 10 tonnes stay in the air....serious answers only?

Question

How does an aeroplane which weighs over 10 tonnes stay in the air....serious answers only?

Answer 1

Its funny that most of passengers on board their holiday jet are all hoping it will get off the ground?...and the captain and 1st.officer up front would be very surprised if it "didnt" get off the ground!...at the correct pre-determined takeoff speed!... the nose if lifted !...this increases the angle of the wings against air flow...creating tremendous amouts of lift...the wings are forced upwards!...and lift the aircraft off the ground...and the aircraft is literally SUCKED up into the sky...

Answer 2

everyone keeps saying lift. Lift is created by air flow through the wings. high pressure flows under the wings while low pressure goes over. The high pressure wants to cancel out the low pressure therefore giving lift because it wants to go through the wings to the low pressure. To get this flow moving you need speed or wind that's why airplanes use millions of tonnes of thrust to get that flow started.

That's the general Idea.

Answer 3

more than ten tonnes of lift created by the wings

Answer 4

they have a SKY HOOK which is so thin you can't see it from the ground.

Answer 5

Lots of good answer here, but remember that just occasionally they don't stay in the air. USAF found this out over the weekend...very expensive.

Answer 6

BERNOULLI'S LAW.  WWW.WIKIPEDIA.ORG

Answer 7

The air.

Answer 8

Air has mass and density. If you were to stick your head out of a car window while traveling down the road at 60 mph, you would feel a great deal of force pushing on your head. Same thing with an airplane, the wings create lift by pushing against the air around them. The amount of lift that the wings create need to exceed the weight of the plane.

Answer 9

I used to fly an aeroplane that weighed as much as 430 tons imperial measure.  But the wings could generate as much as 600 tons of lift.

We used to laugh together on the flight deck when we took off, saying, "Aha! It worked again!"

Try an internet search on "basic aerodynamics."

Answer 10

They have also made BOATS out of solid CONCRETE that float ! FACT !!!

Answer 11

Lift is the component of aerodynamic force perpendicular to the relative wind.

How is lift generated?

When a gas flows over an object, or when an object moves through a gas, the molecules of the gas are free to move about the object; they are not closely bound to one another as in a solid. Because the molecules move, there is a velocity associated with the gas. Within the gas, the velocity can have very different values at different places near the object. Bernoulli's equation, which was named for Daniel Bernoulli, relates the pressure in a gas to the local velocity; so as the velocity changes around the object, the pressure changes as well. Adding up (integrating) the pressure variation times the area around the entire body determines the aerodynamic force on the body. The lift is the component of the aerodynamic force which is perpendicular to the original flow direction of the gas. The drag is the component of the aerodynamic force which is parallel to the original flow direction of the gas. Now adding up the velocity variation around the object instead of the pressure variation also determines the aerodynamic force. The integrated velocity variation around the object produces a net turning of the gas flow. From Newton's third law of motion, a turning action of the flow will result in a re-action (aerodynamic force) on the object. So both "Bernoulli" and "Newton" are correct. Integrating the effects of either the pressure or the velocity determines the aerodynamic force on an object. We can use equations developed by each of them to determine the magnitude and direction of the aerodynamic force.

What is the argument?

Arguments arise because people mis-apply Bernoulli and Newton's equations and because they over-simplify the description of the problem of aerodynamic lift. The most popular incorrect theory of lift arises from a mis-application of Bernoulli's equation. The theory is known as the "equal transit time" or "longer path" theory which states that wings are designed with the upper surface longer than the lower surface, to generate higher velocities on the upper surface because the molecules of gas on the upper surface have to reach the trailing edge at the same time as the molecules on the lower surface. The theory then invokes Bernoulli's equation to explain lower pressure on the upper surface and higher pressure on the lower surface resulting in a lift force. The error in this theory involves the specification of the velocity on the upper surface. In reality, the velocity on the upper surface of a lifting wing is much higher than the velocity which produces an equal transit time. If we know the correct velocity distribution, we can use Bernoulli's equation to get the pressure, then use the pressure to determine the force. But the equal transit velocity is not the correct velocity. Another incorrect theory uses a Venturi flow to try to determine the velocity. But this also gives the wrong answer since a wing section isn't really half a Venturi nozzle. There is also an incorrect theory which uses Newton's third law applied to the bottom surface of a wing. This theory equates aerodynamic lift to a stone skipping across the water. It neglects the physical reality that both the lower and upper surface of a wing contribute to the turning of a flow of gas.

The real details of how an object generates lift are very complex and do not lend themselves to simplification. For a gas, we have to simultaneously conserve the mass, momentum, and energy in the flow. Newton's laws of motion are statements concerning the conservation of momentum. Bernoulli's equation is derived by considering conservation of energy. So both of these equations are satisfied in the generation of lift; both are correct. The conservation of mass introduces a lot of complexity into the analysis and understanding of aerodynamic problems. For example, from the conservation of mass, a change in the velocity of a gas in one direction results in a change in the velocity of the gas in a direction perpendicular to the original change. This is very different from the motion of solids, on which we base most of our experiences in physics. The simultaneous conservation of mass, momentum, and energy of a fluid (while neglecting the effects of air viscosity) are called the Euler Equations after Leonard Euler. Euler was a student of Johann Bernoulli, Daniel's father, and for a time had worked with Daniel Bernoulli in St. Petersburg. If we include the effects of viscosity, we have the Navier-Stokes Equations which are named after two independent researchers in France and in England. To truly understand the details of the generation of lift, one has to have a good working knowledge of the Euler Equations.

Answer 12

Lift generated from the wings; the enormous amount of lift needed to keep a plane in the air is made possible by the speed created from the thrusters~

Answer 13

upthrust of wings and power of engines!!!

Answer 14

the fact that a wing creates lift when air is pushed over the rounded top and flat bottom. that is the main principle behind flight. the heavier a plane is, the more thrust is needed to propell it forwards.

how it works.com is a great resource for that kinda stuff!!

Answer 15

The force of the lift coming off of the wings is in excess of 10 tons. To stay in the air, the wing must maintain that lift despite uncontrollable circumstances, e.g. the weather, that is not meant to be beyond the limit of the wing's design. The lift is created, though, by the air that is rushing over the wing is of less pressure than the air below the wing.

Answer 16

The heaviest aeroplane is the Antonov An-225 weighing over 640 tonnes.  

The basic physics behind keeping a small 2 passenger aeroplane like a Cessna and the largest is the same.  As long as the lift created is greater than the weight of the aircraft, it will fly.

Answer 17

Its called LIFT. The wings and nose combined with surface area and speed create higher air pressure under the plane which forces the plane upwards.

Answer 18

the upthrust generated by the wings is in access of 10 tonnes.