6C Science Fair Knowledge

Transcription

1 6C Science Fair Knowledge

2 Our Science Paragraph By: Bella,Heidi and Jasjot Our science fair experiment was if we could study the features of the flying squirrel and how it glides so we could apply that to the flying squirrel suit. The two we attempted at adding was the weight of the squirrel and getting rid of the little piece in between the legs. The way our experiment is connected to the forces of flight is since they glide, we tried to make the suit a bit slower and that requires air, as we need to know how fast the air goes and since it was supposed to be trapped inside the wings, it affected the suit as the air pushed it a bit, also proving air takes up space. The way it takes up space is that since the warm air expands just like in a balloon, it wants to spread out therefore, creating space as it less dense as it is not huddling together just like cold air which is more dense. Another way that our experiment affects the forces of flight, is that since the flying squirrel is like a glider, it does not have much thrust and does not want as much gravity, as it will just plummet and hit the ground as if they had thrust they would probably be out of control, as they might not be able to maintain that much power.

3 Bernoulli s principle Hayden and Kameryn Our topic is bernoulli s principle and here is some info about bernoulli s principle. There is an equation that explains how pressure and fluids work together and creates lift which then makes the plane fly and not crash unless you don t build the plane right then the airplane can and will go down.when the air goes over and under the wings it will create lift so the plane will fly in the sky without crashing but if there was more pressure on top and less pressure on the bottom the plane likely/ will crash.the reason behind there being more pressure is the higher in the air the colder the air is and the colder the air the lower the pressure it is.the lower the plane is in the air the warmer the air is so there is a higher causes lift.

4 Lift Cooper and Leland Hi we're Cooper and Leland and we are going to tell you about designing an aircraft! For an aircraft to fly it needs to have enough LIFT to get off the ground and it has to be able to overcome the force of gravity. A plane can t be too heavy either or it will crash or may not get off the ground. The Wright brothers invented the 1st airplane that was full size and able to fly on December Planes have aerofoils so air moves easier around the wing. Air exerts about 14.7 pounds per square inch! The higher you are the less air pressure there is so the air on the top of the aerofoil moves faster than the air on the bottom of the wing. The plane's body also needs has to be aerodynamic so it moves easier through the air. We realized that the nose of a plane looks like an aerofoil because air is separated by the nose. Our experiment is important because we can see which parts of a plane affect the plane's flight. Facts Rudder : the rudder uses the flowing air around it to turn left and right. Winglets : make the airplane have more stabilization in flight. Flaps : make a plane descend or climb using the nose. Aerodynamics : the meaning of aerodynamics is the study of objects moving through the air Temperature : the temperature the plane flies in affects how the plane flies because heat can cause serious damage to the engine and other parts of the plane. Air spreads apart when it's hot which makes it easier to fly through. Altitude: the altitude the plane flies at affects how much air pressure is put on a plane so there is less air resistance the higher you are! Will altitude effect your elevators: when the plane flies there is a certain amount of air pressure pushing down on the plane so yes it will because if you are at feet in the air there will be less air pressure pushing down then there will be at feet. Air has weight about 14.7 pounds per square inch at sea level air is affected by the weather and climate. Air is more spread out when it's hot and closer when it's cold

5 flight facts: The level of toxins from plane Exhaust kills more people than plane crashes 1.airplane's engines parts are called the fan, compressor, turbine, nozzle, combustor and mixer! know

6 Increasing Battery Life for Planes Cinch and Ranpartap Start the motor a lot. The plane was good except I kept breaking the motors and propellers off on accidentally. It was a not a good plane to have but it did its job. The thing the plane is trying to overcome the forces of thrust,drag, lift and gravity. We made a battery last longer people asked us how to do it. we said we had three batteries one in cold and hot. We tried to make two motor work, but it failed the battery did not sustain two motor for even a split second. Even if we tried to connect the battery we would have to jump start it.

7 Airfoil Amanda and Evan An airfoil is the shape of the wing that helps the plane fly.lift is one of the four forces of flight. It is the upward force that makes an airplane take off. When air hits the leading edge of an airfoil, the air that is forced to go over the upper camber speeds up. If it makes the air going over the airfoil faster, it has less time to exert pressure causing lower pressure above the wing. The exact opposite for the air going under the airfoil. The design of the airfoil is also a big factor on how an airfoil flyes. A flat bottom airfoil is one of the most common types of airfoils. It is used on commercial flights because it eliminates most turbulence and makes the flight smoother. The symmetrical airfoil is used on acrobatic airplanes. The semai-symmetrical airfoil is used on sport type airplanes like for racing. Airfoils can also be found on animals like bat s wings and dolphin s fins.

8 How do Propellers work? By Hailey and Emiley Our science fair topic was about propellers, Propellers impacts thrust on a plane.the four forces of flight are lift, gravity,drag and thrust. Propellers impact thrust because of bernoulli s principle, the left propeller on the plane turns clockwise and the propeller on the right turns Counter-Clockwise. When the propeller spin faster, then there will be more thrust created, on an airplane, they use turboprops (Engined propellers)

9 Paper Airplane Design By: Marek ANd Mel Our project was to find out what was the most aerodynamic paper airplane design to fly in a head wind. During the time that Mel and I worked on our science project we found out the if you build any type of airplane, you should have large wings they will increase your amount of lift because there is more surface area for the air to lift the plane in the air. You can not have too much weight on the plane or it will not fly or not even lift off the ground. If you were to build an airplane it does matter the design and the material you use like if you use cardboard than you will need more thrust and lift to keep the weight of the cardboard in the air for a extended amount of time. Paper on the other hand has a lot less weight and needs less thrust but still enough to get to where it needs to go.

10 How do parachutes work? Lauren and Prerana A parachute is a creation used to slow down a person who is falling from the air. Our objective for our science fair was to figure out which parachute took the slowest time to touch the ground, and what material was best for parachutes, when it was dropped from the stairwell, and which parachute went against the force weight.when the skydiver falls down from the plane he pulls up the parachute the air molecules around the skydiver get pulled up under the fabric of the parachute and then the parachute slows the person down. The two forces that are part of parachutes that make them actually work are gravity and air resistance. Parachutes work because they slow down air resistance, since that happens air resistance overcomes gravity making the parachute slow down. Even though air is invisible the molecules still catch the parachute and creates less weight. The molecules in the air beside the skydiver gather together and help the skydiver slow down before they touch the ground. Without a parachute gravity is more than air resistance. But as the parachute opens, the Air resistance increases. This slows down the parachute and the person can land safely on the ground. Parachutes are made to slow down the person who is falling from the plane. The reason we thought that the grocery bag was going to have the longest time is because it is thin and light so it floated down slower. The reason we thought that the paper was going to be the parachute with the least time because it was lightweight and not that durable. Hoped you liked learning about our experiment and what we did for the science fair.

11 Flying lizard research Justin and Samnit They look ordinary the only thing dragon like about them scaley skin. Ribs to turn into wings it lives most of its life in trees. When the lizards muscles in the chest flex the Wings are pushed forward and out. There really just known as gliders. Their wings don't provide power but they increase lift The lizards also use their long tails to maneuver. They have the ability to glide up to 30 feet. There are over 40 of The lizards species. Each has its own distinctive body.

12 Hot Air Balloon Ryan and Raechel Our science fair topic was investigating how we could make hot air balloons more efficient. The reason hot air rises is because when air is heated it expands when the air expands it becomes less dense than the air around it. The less dense hot air then floats in more dense cold air much like wood floats on water because wood is less dense than the water. Why solar power is better because instead of using 7 megawatts of energy which a regular hot air balloons use your using solar power that uses the sun not propane. Another reason solar power is better is because it doesn t pollute the air were as propane does which is the fuel they use for hot air balloons. The better the temperature, the faster the air particles move which increases pressure, hitting the side of the balloon move often and harder. Which makes the hot air inflate more the more cold the air becomes though, the slower the particles move (decreasing pressure), result the same amount of air now taking up space.

13 Air Pressure: Our topic involves Air Pressure and proving why air takes up space. Why does Air take up space? Well anything that has mass takes up space. And air has mass. And how do we know that? Air mass keeps things down such as tables, chairs and other objects. FACT: If you look up, 11 thousand pounds of air will sit on your face. If you think of it, in a bottle, their would be air? Right? Especially if the cap is on. So, when you wrap a balloon around the lip of the bottle the balloon will hang down inside the bottle. Since there is a hole in the side of the bottle. We were able to suck air out, and the balloon blew up, How? Well since air takes up space, sucking air out would make room for the balloon to grow in size, and that is correct. The air pressure inside the bottle compressing the balloon so of course it won't grow. It's almost like reverse blowing up a balloon, but from the outside. To simplify our project, air pressure compressing the balloon so it doesn't blow up, also because air in the bottle is taking up space, and since air is in the bottle and taking up too much space it compressing the balloon. < Jada, Delaney. >