Winglets, (the "up curl at the end of the wing"), reduce the aircraft's drag by partial recovery of the tip vortex energy. The reason airlines go to the added expense of fitting them is that they can reduce fuel burn quite considerably thus saving money in the long-run.
The force that pushes an airplane wing up is called lift. Lift is generated by the difference in air pressure above and below the wing, created by the wing's shape and angle of attack. This force allows the airplane to overcome gravity and stay airborne.
They test it in the wind tunnel. If the design fails to pass the test they make an another design. By testing and testing they come up with the design at last.AnswerEngineers begin a wing design by identifying the purpose of the airplane and the speeds and weights that it will operate. An airplane that will fly slow may have a thick wing or a long & tapered wing. A fighter aircraft that will fly supersonic will have a thin wing and short and stubby. Then they adjust the shape of the wing to obtain the Lift and Drag and airflow that is needed for the design.
through aerodynamics. The shape of the wing is built so that air passing underneath the wing has more pressure than that above it pushing the plane up.
Winglift.Lift is pressure on the wing due differential air pressure below and above wing. This difference results from the difference in curvature of the wing top and bottom..
Well, with all airplanes you have wing warping, which basically controls the wings and the direction the plane is traveling. This means that you can control the airplane around all three axis, which is in the definition of a airplane. All three axis means you can control the airplane in all directions, nose right or nose left, also known as yaw, nose up or nose down, also known as pitch, or wing up or wing down, also known as roll.
A wing lifts an airplane off the ground through the Bernoulli's principle, where the shape of the wing creates a pressure difference between the upper and lower surfaces. This pressure difference generates lift, which counteracts the force of gravity and allows the airplane to become airborne.
Pressure below the wing is higher, causing air to rush upwards, trying to get above the wing, causing lift.
An airplane will crash if the engine fails because the engine pulls the wing forward (and the plane) and the wing creates lift when it is moving forward, so it goes up. If there is no lift, the plane obeys the law of gravity and crashes.
Rotary wing aircraft can. They are commonly called helicopters. However, fixed wing aircraft need air moving over the wings to hold them up.
While the airplane moves, the air pushes up against the wings. This has to do with the special shape of the wing, and, to a great part, to Bernoulli's principle.
The lift force is generated by the shape of the wing (airfoil) and the angle at which it meets the oncoming air. As the airplane moves through the air, the wing's design creates a pressure difference between the top and bottom surfaces, resulting in a net upward force known as lift.
Curl-up was created in 1951.