how does a p-47 thunderbird produce lift?
354185
The short answer is, the same way all fixed wing aircraft do.\n\nWings on aircraft product lift, by taking advantage of something called Bernoulli's Principle. It says, in essence, that faster moving air causes air pressure to be lowered. You'll notice that the upper surface of aircraft wings are curved, and have more length to them than the underside of the wings. Since the airflow over the wing's surface has a greater distance to go on top than on bottom, the speed of the airflow is faster on top of the wing, hence lower pressure.\n\nStill, the best designed wing in the world won't help an aircraft get airborne without something known as the thrust/weight ratio. The P-47 was a very heavy aircraft in its day, but had a massively powerful radial engine that produced more than enough thrust to get it airborne and let Bernoulli's Principle take over...\n\nA great aircraft with an impressive war record.
1161605
If the aircraft is pulling a load factor of 2.5 then the wing must produce 2.5*5000 kg or 12500 kg.
1177603
well, it's the area of the wing of the lifting surface, the weight of the plane, along with the pitch angle witch can be adjusted to generate more down force, but a high pitch angle would cause the plane to stall and maybe crash, also the altitude; planes can fly slower at lower altitude because the air is more dense there which means that less speed can generate enough life for it to fly..
1178597
The rotors are able to be tilted on a helicopter, so they can be actually tilted below horizontal if it is designed that way to be able to do so.  Sort of like some biplanes can fly upside down.  But that takes LOADS of power because the airfoil is terribly inefficient that way.   But let's assume you can generate sufficient power and design it so it would work.  That would be a big task in and of itself.\n      It adds a whole dimension to the problem of gyroscopic action of the rotor and tail when you're talking about inverting.  That's an engineering dilemma in and of itself.\n      But if you could accomplish the above, and I imagine that could be done, you still have this nagging problem of now that the helicopter is upside down you have the center of mass of the helicopter above the rotors, which is inherently unstable.  A human could not possibly balance the thing upside down, it would take computer-controlled flight, sort of like what they use with unstable inverted wings on jet aircraft, to pull that off.  Helicopters have done rolls and inverts, but none has truly been flown upside down for a reasonable distance, let's say 1 mile.  \n      If someone had the time, the money, and the incentive to do it, I don't see why it should be impossible from an engineering perspective, just no one has tackled the problem.  Assuming the helicopter also has to be able to function normally in "regular" flight, your biggest problems would be:\n     1) additional power\n     2) rotor design that is allows inversion of the rotor\n     3) overcoming gyroscopic obstacles (control issues)\n     4) and let's see......control, control, and....oh, yes....control
2504
More than Bernoulli's principle and wing shape (airfoil) are at work in keeping a plane in the air. The main criteria is the  "angle of attack" of the wing. That is, the angle at which the wing meets the air passing by it. When a plane is flying, its wing is always at a positive angle of attack; the leading edge of the wing is higher relative to the air going over it than the trailing edge. So the air pushes the wing up.  When the plane is inverted, the angle of attack must be great enough to overcome the "negative lift"  created by the airfoil. This is accomplished by adjusting the elevator. Inverted flight will always require the input of down elevator.
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".
818618
An Hydraulic lift, is a lift that works by using hydraulic oil to raise and lower it,an hydraulic ram is fitted to the under side of the lift. Other lifts work by means of the traction sheave driving the lift car up and down. An Hydraulic lift is not as fast as normal lift, but can take greater weight, and the other thing about an Hydraulic lift is that the lift motor room can be remote from the lift shaft unlike a normal lift.
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)
1031881
As an aircraft moves through the air, the wing is inclined to the flight direction at some angle. The angle between the chord line of the airfoil and the flight direction is called the angle of attack. Angle of attack has a large effect on the lift generated by a wing. During takes off, the pilot applies as much thrust as possible to make the airplane roll along launch rail. But just before lifting off, the pilot "rotates" the aircraft. The nose of the airplane rises, increasing the angle of attack and producing the increased lift needed for takeoff.\n\nThe amount of lift generated by a wing depends on how much the flow is turned, which depends on the shape of the object. The lift is, in general, a very complex function of the shape.the greater the air flow turning, the greater the lift.\nIt is important to note that the acceleration of the air does not just involve the air molecules "bouncing off" the lower surface of the wing. Rather, air molecules closely follow both the top and bottom surfaces, and so the airflow is deflected downward. The acceleration of the air during the creation of lift has also been described as a "turning" of the airflow.\nWhen the air is bent around the top of the wing, it pulls on the air above it accelerating that air down, otherwise there would be voids in the air left above the wing. Air is pulled from above to prevent voids. This pulling causes the pressure to become lower above the wing. It is the acceleration of the air above the wing in the downward direction that gives lift.\n\n\nThe amount of lift generated by an object depends on the size of the object. Lift is an aerodynamic force and therefore depends on the pressure variation of the air around the body as it moves through the air. The total aerodynamic force is equal to the pressure times the surface area around the body. Lift is the component of this force perpendicular to the flight direction. Like the other aerodynamic force, drag, the lift is directly proportional to the area of the object. Doubling the area doubles the lift.\n\n\nThe greater the angle of attack, the greater the vertical velocity. Likewise, for the same angle of attack, the greater the speed of the wing the greater the vertical velocity. Both the increase in the speed and the increase of the angle of attack increase the length of the vertical arrow. It is this vertical velocity that gives the wing lift.
619719
"Helicopters don't fly, they beat the air into submission."\n\nBut seriously, all rotary wing aircraft transit horizontally by differential lift. This is accomplished by tilting the rotor more on one side than the other. Overall pitch is controlled by the collective.
223869
This is not a simple question.  High lift systems can be nothing more than trailing edge wing flaps, and increase in complexity to some very involved systems.  The whole point is to obtain greater lift from the wing, most often during the landing phase of flight.  Look into the various types of wing flaps, and votex generators, just for openers.
836719
well, is a lot of different things that make the airplane take off and stay up there.\n\nThe body design " fuselage" I think is the word.\n\nMasive wings and tail wich give the plane lift, pitch and roll.\n\nPowerfull turbines. A turbine works by pulling the air from the front, accelerating it, heating it up and then spitting it back out from the back at a really really high speed rate.\n\nInside they have a crew, you know, pilot, co-pilot, and others.\n\nComputers, gps and all that good stuff.\n\nThere is also the tower that directs them and helps them take off.\n\nAnd you put all of those things together and that is preety much how is done.
972802
They fly because of Bernoulli's theroem, which states that a moving gas has a lower pressure than a stationary one.  The wing has a curve across the top, and a flat underside.  That means that air going over the top has to move faster than the air going under the wing, which creates a lower pressure area on top of the wing.  The higher air pressure under the wing pushes up on the wing.\n\nYou can experience something similar by putting your finger over the jet in a jacuzzi.  If you hold it close to the opening, the fast moving water flowing around your finger will have a lower pressure than the surrounding water, and you will feel a slight pull on your finger towards the jet.  Move your finger back a little, and you will feel the weight of the water hitting your finger and pushing it away.\n\nAs far as balancing the plane, the fuel is moved around just like transparentearth said, and the manufacturer of the plane has carefully calculated where the center of gravity of the plane is, and the pilots have detailed information about how the load the plane is carrying should be distributed.
50908
The shape of the wings is such that, as the aircraft moves forward, air flows over the top surface faster than the underside...  so the pressure above the wing is lower than the pressure under the wing...  thus, the force from under the wing is greater than the force on the top, and there is thus a net "lift" as the plane moves.
1175450
In order to create lift, the upper surface of a wing must be longer than the lower surface. That's why wings are curved. The bottom is flat and the top is curved. The F-117 doesn't have a "curve", but the upper surface is shaped with flat plates so that the upper surface is longer than the lower surface. It's not as aeordynamic and efficient as a nice, smooth curve, but I'll take not being seen over efficiency any day in a war.
578530
Yup!  They used it in the movie E.T., and it flew!  I'm sure you can find it on Ebay or something.
641848
because the sr-71 flew at high speeds and altitudes therefore the plane used to get heated up and as a result it body expanded.   in order to ensure that the body didnt crack on account of expansions designers left some spaces which resulted in fuel leak.  that was the reason why it wasnt fully fuelled before take off.\n\nafter it had taken off and "warmed up" mid air refuelling was carried out