0
Bernoulli's equations explain 100% of the lifting force created by wings. But Newton's third law also explains 100% of the lifting force. This should not be suprising, since Bernoulli's equations are based on Newton's laws. Bernoulli and Newton are two different ways of explaining a complicated situation. Neither is more "right" than the other. If we choose one explanation while ignoring the other, then our understanding of flight will be incomplete.
To be clearer... Bernoulli's equation describes the lifting force in terms of pressures applied to the wing surface. There are no other forces involved. If we know the pattern of pressures, then we know the lifting force. Yet the explanation of flight remains incomplete. Wings feel pressure because they change the motion of the surrounding "parcels" of air, and air has mass. If a wing applies a force which causes air to accelerate downwards, then by Newton's 2nd and 3rd laws, the wing must experience an equal upwards lifting force. If we know the acceleration of the air surrounding the wing, then we know the lifting force.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
How was part of The Pentagon destroyed?
airplanes
Does the shape of a plane wing affect the flight?
Yes, wing shape is important for several reasons: If the shape is wrong, then the air flow will peel loose from the wing's upper surface. If this happens, then the air flow becomes turbulent, and the wing can no longer deflect the air. This is called "STALL." So the shape of the wing is important in preventing stall. If a wing was flat like a board, it would work fine as long as it wasn't tilted. If tilted, the air flow peels loose from the leading edge, and Stall is created. But it MUST be tilted in order to create lift. The solution is simple: make the leading edge round, and the trailing edge sharp. An airfoil must be shaped like a streamlined teardrop. That way it can be tilted, and the air still flows smoothly around the leading edge. Stall is prevented. To deflect air and provide lift, the trailing edge of the wing must tilt down. We could tilt the whole wing. But if the wing angle is too steep, the air flow will not follow the wing surface. The wing will "stall." But when flying slowly, less air gets deflected, so the wing must be tilted more. Doesn't this mean that large heavy airplanes can't fly? Would their wings tilt too much, then stall? No, because wings can have an arch shape or cup shape. If a wing is humped up in the center, then it will smoothly deflect air, and stalls are prevented. This shape is called "airfoil camber." A heavy slow plane needs a highly cambered wing. A fast small plane needs a wing which is almost flat. The side view of airplane wings looks like a bent teardrop shape, with a round front and a sharp back. WARNING: some people will tell you that a wing must be curved on top and flat on the bottom. This is wrong. The curves don't matter at all. Instead, the front edge of a wing must be round, and the wing must be cambered (curved.) Some high-lift wings are so cambered that the bottom is not flat at all, instead it arches inwards.
How do planes stay in the air?
As an aircraft's wing moves through the air at speed the air on top of the wing is forced to follow a longer path than the air moving underneath the wing [due to the spahe of the wing] This reduces air pressure on the upper surface of the wing and creates lift.
How do you make a origami plane?
There are many tutorials on the internet that show you how to make origami planes. (Paper airplanes.) You can find them by searching 'Paper Airplanes' on Google.
What is a equation that is the inverse of the exponential equation?
Logarithmic equation
What are the three applications of bernoullis equation?
Airplane,ventrimeter,andpump
What is bernoullis equation of fluid in a pipe?
A1V1=A2V2 or V2=(A1/A2)(V1)
How do airplanes flya?
They way airplanes fly is actually very simple. The wing of an airplane is curved on the top and flat on the bottom. This means that the top side of the wing is longer than the bottom part. When air passes by the wing, some of the air goes on top and some on the bottom. Because the particles of air want to stay together by the law of attraction, the air that passes over the top of the wing moves faster than the air that flows under the wing. This causes a low pressure system to form above the wing and a high pressure system to form below the wing. The higher pressure beneath the wing forces the wing up allowing the air plane to fly. This is also called Bernoullis principle.
What was World War I airplanes?
There were many different airplanes developed during the war - bombers and fighters. They came in single wing (monoplanes), two wing (biplanes) and three wing (triplane) varieties.
What does airplanes have?
wings engine and body.Also wing tips
Are airplanes aircraft?
Yes, airplanes are aircraft. However, not all aircraft are airplanes. Helicopters, blimps, and balloons are aircraft- but they are not airplanes. Airplanes are generally fixed wing machines that move through the air.
What is a Fixed Wing Airplane?
A fixed-wing aircraft is an aircraft which has wings that are attached to the aircraft and do not move. The term is used to differentiate airplanes from other types of flying vehicles such as lifting-body aircraft (balloons and blimps) or rotary aircraft such as helicopters and auto gyros. All airplanes are considered fixed-wing aircraft and even swing-wing or otherwise moving-wing airplanes are usually referred to as being in the fixed-wing category of aircraft.
What do you call a group of airplanes in formation?
A flight, a squadron or a wing.
Do airplanes usually have 2 wings?
Yes, airplanes usually have 2 wings. 1 wing would be unsteady.
Airplanes and aircraft?
Airplanes are generally fixed-wing aircraft. Aircraft can mean any type of flying machine, from airships (balloons/blimps), jets, propeller driven airplanes, rotor-wing (helicopters), UAVs (Unmanned Aerial Vehicles), drones (about the same thing as a UAV), or the space shuttle.
Can an airplane go to space?
No. Airplanes need air to fly. The wing shape when passing through the air, creates more pressure on the bottom of the wing than on the top creating lift. In space there is no air and so airplanes will not work.
What is a delta wing?
Delta wing is the swept back wing design seen on jet airplanes like the Concorde. It is also a race car used in Le Mans in 2012.
