Watch the above video and check out the History or Aviation poster in our classroom. Do you think anything is missing? (Post your response.)
http://futureflight.arc.nasa.gov/map.html
http://www.wonderville.ca/browse/teachers?pid=6&sid=26
http://www.boeing.com/companyoffices/aboutus/wonder_of_flight/how_things.html
Open the above links. Using the information provided answer the following questions:
1. What is an airfoil?
2. How does an airplane fly?
3. How does a bird fly through the air?
*Make sure all answers are in your own words. You may add diagrams.
5 comments:
1. The wings of a bird and the wings of an airplane are in the shape of an airfoil. an airfoil might seem like just a regular shape, but it is not. If the airfoil was a different shape, any airplane or bird that has one would not be able to fly. The shape of an airfoil splits the air, half going on the top half of the airfoil, the other half going on the bottom half of the airfoil. The special shape allows for the air on top to speed up whilst keeping the air below the wing at regular speed. This creates less air pressure at the top, and since high air pressure always moves towards low air pressure, and the lower air pressure being on top, the air on the bottom moves up, in turn pushing the wing up. When there is enough push on the wing, the airplane (or bird) creates lift, which makes it fly.
2. As I already said, the wings of an airplane (airfoil) create lift, but the force working against lift is gravity. In order to overcome gravity, the force of lift needs to be strong enough to lift the airplane up (the bigger the airplane, the more lift needed). A plane always has to move forward (thrust), but the force that moves against it is drag. The engines of an airplane needs to be strong enough to move forward, not back!
3. When a bird flaps its wings, the air around the wing is pushed downward (because of the motion of the wing). Because the wing of a bird is shaped like an airfoil, when the wing does that fluent motion, it creates lift, and it doesn’t have to flap its wings, because when it is just gliding, the shape of the wing still creates life so it can still ascend, even when the bird is gliding.
That is all.
Thank you, thank you very much
~Xavier
1. Every regular airplane has a wing called an airfoil. As the wing goes through the air the air is split up above and below the wings. The air below the wings goes in a straighter line and the air above stretches out. The air then meets at the other side. The air from below the wing pushes up and makes the airfoil fly up. This whole aircraft is now getting lifted. The faster the airplane moves the higher is is lifted. And when the force of lift is greater than gravity the plane starts to fly!
2. Planes fly with the help of four forces that push and pull them around the air. The wings are an airfoil and produce a force called lift so they can fly safely through the air. Gravity is the opposite of lift, bring things back down to land and pulls the airplane downward at the same time. During the flight these two forces fight which make the airplane safe and flying. another force called drag slows the airplane down. The final force is named thrust. Thrust fights against drag to propel the airplane forward, but not too fast. This force is created by an engine or a propeller.
3. Here is the way that birds fly. When birds flap their wings the air gets pushed downwards. This creates a force that propels the bird higher in the air creating a force called lift. This is how they get around so easily in the air. Resembling a wing from an airplane they bird’s wing is shaped like an airfoil. Birds can even create lift by just gliding through the air. Their wings are very strong and can take off from the ground and and guide themselves through forest like areas.
Thank you! :D
~Ronan
1. What is an airfoil?
An airfoil is a shape of a wing of an airplane, as well as a wing of a bird. It is a shape that is very efficient to create lift, it has curved surfaces to give the most favourable ratio of lift to drag in flight. An airfoil shape has a low pressure area on top, and a higher pressure area below, causing the higher pressure air to go up, and lifting the airfoil. That only can happen when it is moving either forward or backwards. So that is how airplanes and birds fly.
2. How does an airplane fly?
Airplanes have airfoil shapes on their wings. So when they increase speed for takeoff, there is more air pressure at the bottom than at the top, which would generate lift. So when they lift, the jet engines/propellers in the airplane generate thrust which make the airplane move forward. When the airplane is up in the air already, then the elevators make it stay at the same altitude so it can stay aloft.
3. How does a bird fly in the air?
Birds also have airfoil shapes on their wings. When they flap their wings, that produces thrust. Their airfoil shapes generate lift as they speed up, because they have higher air pressure on the bottom than the top, so that generates lift. When the birds flap their wings, the airfoil shape is pushing them up, as well as the flapping motion. They have to keep flapping their wings in order to stay aloft. This is very similar to how airplanes can fly.
https://docs.google.com/document/d/1P8U5q-5NUd3vN_NL8TkZ2TcnNW3GpZtiNoBmEoMWn4c/edit?usp=sharing
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