How do airplanes breake throught gravity?
414941
They dont "break through" gravity - there is no point it actually 'starts'.\n\nGravity is simply a negative force acting upon the aircraft ... in simple terms their weight.\n\nThe 'lift' from their wings (due to their shape and speed) counteracts the weight of the aircraft allowing it to leave the ground when enough has been generated.
193979
Airplane wings use a combination of Bernoulli's principle (the faster air flows over a surface the lower its pressure) and "Reaction" or Newtonian lift, the force produced by the downward acceleration of an air mass by a plane surface that is tilted with respect to the velocity. (See 1st & 2nd references). The upper surface of the wing is curved and the lower surface is relatively straight. Thus air passing over the wing has farther to travel before it rejoins the air that went under the wing, and must move faster. The lower pressure over the wing creates a Bernoulli lift force. The wing also has a positive "angle of attack" (basically the tilt angle of the wing's lower surface) producing Newtonian lift. Ref. 1 estimates that airliners have more Newtonian than Bernoullian lift. The wing transfers the sum of these lift forces to the airplane. And of course the thrust needed to reach the speed necessary for the wings to provide adequate lift comes from a motor-driven propellor or a jet engine. \nBirds, having movable wings, fly in two basic modes, gliding and flapping. These modes also use a mix of Bernoulli's principle and Newtonian momentum exchange to achieve lift. When gliding, the curved wing surface operates similarly to that of an airplane. More momentum exchange occurs when the wings are flapped; each downstroke pushes air downward and backward which provides an upward and forward force to the wing and through the wing to the bird's body. Feathers play a vital and mechanically complex role in flight, especially in flapping. The 3rd reference discusses this in some detail. I can't put pictures in this answer but the 4th reference provides a diagram of gliding lift, and you can find much more by googling "aerodynamic lift birds".
899952
If you throw a ball across the room, it will stop accelerating as it leaves your hand.\n\nThe whole ball (including anything inside it) will carry on travelling according to the force you applied, but its direction will be altered by gravity (which is still pulling it downwards).\n\nThe shape it's flight makes is called a 'parabola', and this same shape happens whenever gravity stops an object from travelling upwards (even a purely vertical thrust will lead to some sideways movement; this is called 'Coriolis effect'), and makes it travel downwards instead.\n\nBecause the outside of the object is always travelling in the same direction as the objects inside it, they don't press on each other (their relative 'G' is zero). Because 'weight' is actually just relative pressure, the objects will seem weightless.\n\nThe American and Soviet 'vomit comets' are large transport aeroplanes with strengthened wing roots and a padded interior.\n\nThe pilot will first initiate a steep dive, and pull up out of this as if he is going to 'loop the loop'. Pulling up from a dive like this will press the passengers against the floor, so they seem heavier than normal; typically 3-4 times their normal weight (3-4G).\n\nAs the plane comes up from the dive, this extra 'G' will decrease, until it reaches zero, and the passengers feel 'weightless'. \n\nAt that point, the aeroplane is travelling upwards under the momentum of its own weight, like a roller coaster. If the pilot kept the engines accelerating, they would drive the plane upwards and press against the passengers, but by cutting the engines, the plane is left to rise like a thrown ball. It travels in a parabolic curve, but the passengers don't (they tend to bounce around in zigzags, perform somersaults for the camera, lose their sense of direction and start puking)\n\nAbout 40 seconds of weightlessness can be simulated in this way, because that's how long it takes for the plane to stop rising, and return to its downward dive speed. If it was left to dive for too long, pulling out of the dive would rip the wings off.\n\n(if that happened, the passengers would experience weightlessness (or very nearly; air resistance would slow the plane, but not them) all the way to the ground, but they wouldn't be able to tell us about it afterwards)
257523
Lift, thrust, gravity, drag.
514578
Yes, Gravity works everywhere, but there are some kinds of gas that result lighter than gravity so they float or even goes up.
1169302
Yes, gravity exists near anything that has mass.  If you remove the air from a container, what's inside won't float.
423647
landing and taking off of airplanes
1100560
Antigravity on earth at least = negative G’s.  you can achieve this by jumping a dirt bike or even your car (not recommended).  \n\nThere is even a flight called the Vomit Comet.  NASA operates a KC-135 craft outfitted to perform parabolic arcs that give weightlessness or more properly freefall lasting 20-25 seconds. The plane is nicknamed "The Vomit Comet" because of the large number of researchers that become ill. Imagine a roller coaster thousands of feet high. Imagine going up and down that roller coaster repeatedly for a coupole of hours. Now you know why so many people get sick!
462882
an airplanes wings are shaped specially to create an upward force on them called "lift.'\n\nessentially, it forces air to flow over top of them, which creates negative pressure on the top side of the wings, causing the plane to "float" on top of the air, but only when going faster than certain speeds.\n\nA boat floats because it displaces more water than its own weight, causing it to be less dense then the water, and making it float on top.
653943
gravity and inertia\n\nread more below. It is really fascinating.
10866
Get on an elevator. Press the "down" button. The moment it starts to go down, jump up. You'll be in free fall (at least for a moment) which will simulate zero gravity. There you go - absolutely free.
727320
If you were truly flying straight, you would eventually fly into outer space. Planes do follow the curvature of the earth--usually by maintaining a certain altitude.
469018
I am sure that every one has been to the amusement park and on a ride that drops suddenly.  If so you have experienced zero gravity. Zero gravity is noticed when something is in free fall. For example 2 parachutists. From the ground they are falling due to gravity.  But to each other they are in free fall. Jump out of a plane holding a weighted object (one not affected by wind) As long as you and the object are falling together you are free falling.  Let the weight go and it will stay right next to you. Any airplane that climbs and then you push the stick over, it will drop away from you and you will float unless buckeled in.  Yes that is how they train in the cargo bay of a plane.  No special equipment needed (except the padding helps). They climb and at any point the pilot pushes the stick forward, the plane goes into a dive, and everyone is weightless. Altitude is only determined by: how long you wnat to float and being able to safely recover from the dive.  In the movie Apollo 13, the "floating space sequences"were filmed in the back of a cargo plane that had the space capsule set in it. They were weightless in those scenes. Yes the swimming pool training is very similar to weightless conditions, because they are in "zero bouyancy".
463808
In order to combat gravity, we would need to be able to understand what it is. At the moment, we don't. If we did, it still would be a tall order to mess with the field of a whole planet. Assuming we could "stabilize" gravity at the quantum level, whatever device we invented to do this would undoubtedly require huge amounts of energy.\n\nA much easier method would be to install a system of shock absorbers and hydraulics underneath the floor. Controlled by a computer, these could make up for some weakenings in the field and simulate to the human feet an equal field. This wouldn't actually solve the problem, just treat the syptoms. The air pressure of the cabin could also be increased to press our feet down on the ground more, but if we mess with this too much, we will implode. Also, there is the idea of placing a large verticaly aligned doughnut-shaped cabin to produce "gravity" in the form of centrifugal force, but this would be extremely impractical and require a lot of digging. I hope this helps, because until we have Artificial Gravity, there isn't really a lot that can be done. Cool question, though.
680049
Great question, and you have the answer within the question!   It's air pressure that allows an airplane to rise into the air.  The secret is to get more pressure pushing up than pushing down.\n\nMany years ago scientists discovered that fast moving air exerts less pressure than slower air.  So you have to get the air on top of the plane's wing moving faster than the air on the bottom of the wing.  How do you do that?  Curve the top of the wing!   Then the air has to travel farther (to go over the curve), so it's going to go faster.  The bottom of the wing is flat - slower air, more pressure up against the wing.  \n\nThe difference between the two pressures - under and over the wing - is enough to make even a huge 747 go up into the air - if the air is flowing fast enough.  That's why an airliner has go almost 200 km/hr (or well over 100 mph) to before it starts to fly.
522890
Yes this happens and it happens because when an airplane lands it displaces air around it with a high pressure and speed.This large volume of displaced air with high speed exerts a high pressure on the car and it flies away from the track
699969
Jump out of the plane.\n\nCoach