Aerodynamics- what is it?
According to the National Aeronautics and Space Administration (NASA)...
Aerodynamics is the study of forces and the resulting motion of objects through the air.
Aerodynamics is the study of forces and the resulting motion of objects through the air.
Why do birds suddenly appear? & more importantly... How do they fly?
Vocabulary:
Air Foil
Lift- a component of the aerodynamic force, which is perpindicular to the flow direction of the gas.
Drag- a component of the aerodynamic force, which is parallel to the flow direction of the gas.
Thrust
Lift- a component of the aerodynamic force, which is perpindicular to the flow direction of the gas.
Drag- a component of the aerodynamic force, which is parallel to the flow direction of the gas.
Thrust
Lift & Wing Design
How Do an Airplane's Wings Provide Lift?
The shape of an airplane's wings is what makes it able to fly. Airplanes' wings are curved on top and flatter on the bottom. That shape makes air flow over the top faster than under the bottom. So, less air pressure is on top of the wing. This condition makes the wing, and the airplane it's attached to, move up. Using curves to change air pressure is a trick used on many aircraft. Helicopter rotor blades use this trick. Lift for kites also comes from a curved shape. Even sailboats use this concept. A boat's sail is like a wing. That's what makes the sailboat move.
http://www.nasa.gov/audience/forstudents/k-4/stories/what-is-aerodynamics-k4.html#.UqLqoWRDvVs
The shape of an airplane's wings is what makes it able to fly. Airplanes' wings are curved on top and flatter on the bottom. That shape makes air flow over the top faster than under the bottom. So, less air pressure is on top of the wing. This condition makes the wing, and the airplane it's attached to, move up. Using curves to change air pressure is a trick used on many aircraft. Helicopter rotor blades use this trick. Lift for kites also comes from a curved shape. Even sailboats use this concept. A boat's sail is like a wing. That's what makes the sailboat move.
http://www.nasa.gov/audience/forstudents/k-4/stories/what-is-aerodynamics-k4.html#.UqLqoWRDvVs
Build a Bird
the-flying-scrooge3a-ornithopter-of-household-items.pdf | |
File Size: | 1101 kb |
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Bernoulli's equation
When an object (bird, plane, etc...) moves through a gas (air), the gas molecules are free to move around the object. Why? Now the gas has a velocity. The velocity can have different values at different places around the object. When the velocity changes around the object, the pressure also changes. Adding up the pressure variation times the area around the body determines the aerodynamic force on the body.
Newton's 3 Laws of Motion
Newton's 3 Laws
1. If an object is not moving, it will not start moving by itself. If an object is moving, it will not stop or change direction unless something pushes it.
2. Objects will move farther and faster when they are pushed harder. Newton's 2nd. Law defines a force to be equal with to the change in momentum with a change in time. Momentum is the mass of an object times it's velocity.
3. When an object is pushed in one direction, there is always a resistance of the same size in the opposite direction. When looking at aerodynimics, adding up the velocity variation around the object can determine the aerodynamic force. A force causes a change in velocity and the change in velocity in turn generates a force.For every action/force in nature there is an equal and opposite reaction.
1. If an object is not moving, it will not start moving by itself. If an object is moving, it will not stop or change direction unless something pushes it.
2. Objects will move farther and faster when they are pushed harder. Newton's 2nd. Law defines a force to be equal with to the change in momentum with a change in time. Momentum is the mass of an object times it's velocity.
3. When an object is pushed in one direction, there is always a resistance of the same size in the opposite direction. When looking at aerodynimics, adding up the velocity variation around the object can determine the aerodynamic force. A force causes a change in velocity and the change in velocity in turn generates a force.For every action/force in nature there is an equal and opposite reaction.
Rotor Egg Drop Competition
Our goal is to build an unpowered autorotation helicopter device that uses one or many rotors (or spinning wings) to safely transport a raw egg from a height of 5 meters to the floor without cracking it.
What is a Rotor?
A rotor is a device having blades radiating from a central hub that is rotated to produce thrust to lift and propel a helicopter.
Collins English Dictionary – Complete and Unabridged © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003
Collins English Dictionary – Complete and Unabridged © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003
A rotor is a system of rotating airfoils, as the horizontal ones of a helicopter or of the compressor of a jet engine.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Our Rotor Egg Drop will work like a Helicopter
How Does A Helicopter Work?
In order to fly, an object must have "lift." Lift is what pushes something up. Lift is made by wings. Wings have a curved shape on top and are flatter on the bottom. That shape makes air flow over the top faster than under the bottom. The faster air on top of the wing makes suction on the top of the wing and the wing moves up. Airplanes get lift from their wings. A helicopter's rotor blades are spinning wings. A helicopter moves air over its rotor by spinning the blades. The rotor makes the lift that carries the helicopter up.http://www.nasa.gov/audience/forstudents/k-4/stories/what-is-a-helicopter-k4.html#.UqLpAGRDvVs
In order to fly, an object must have "lift." Lift is what pushes something up. Lift is made by wings. Wings have a curved shape on top and are flatter on the bottom. That shape makes air flow over the top faster than under the bottom. The faster air on top of the wing makes suction on the top of the wing and the wing moves up. Airplanes get lift from their wings. A helicopter's rotor blades are spinning wings. A helicopter moves air over its rotor by spinning the blades. The rotor makes the lift that carries the helicopter up.http://www.nasa.gov/audience/forstudents/k-4/stories/what-is-a-helicopter-k4.html#.UqLpAGRDvVs
Structure
http://tanveerrauf.wordpress.com/2013/03/22/
http://tanveerrauf.wordpress.com/2013/03/22/
http://science.howstuffworks.com/transport/flight/modern/helicopter5.htm
Material
http://www.csfreshink.com/photo/rotor-egg-drop
http://www.csfreshink.com/photo/rotor-egg-drop
Form versus Function
I found this beautiful Rotor Egg Drop on a site by San Jose State University students of a 3D Concepts class. The assignment was to create an egg drop device that looks as if Leonardo Da Vinci made it.
http://www.niemworks.com/else/eggdrop.html
I found this beautiful Rotor Egg Drop on a site by San Jose State University students of a 3D Concepts class. The assignment was to create an egg drop device that looks as if Leonardo Da Vinci made it.
http://www.niemworks.com/else/eggdrop.html
Pictures in Slide Show from the following internet sites:
http://caltech.typepad.com/caltech_as_it_happens/2013/03/final-volunteering-for-science-olympiad-.html
http://caltech.typepad.com/caltech_as_it_happens/2013/03/final-volunteering-for-science-olympiad-.html
Build a Rotor Egg Drop
amazing--graceful-egg-drop-contraption.pdf | |
File Size: | 634 kb |
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