CO2 Dragster Design- Aerodynamics by langkunxg

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									CO2 Dragster Design


               Mr. Berner
               Mr. Rieger
                  2008
         Research and Development
                 Objective
Research in CO2 auto design involves the study
 of a few sciences related to the motion of your
 dragster.
• Aerodynamics- the study of how solid objects displace fluid
  air and other gases;
• Physics- the study of matter in motion;
• Tribology- the study of friction;
      Research and Development
              Objective

Development of CO2 auto design requires-
• Understanding the problem or purpose- trying to achieve the
  fastest speed and/or best appearance;
• Knowing your limitations- being aware of safety regulations,
  materials allowed, specifications, tolerances and
  functionality;
• Making intelligent decisions- taking what you learn and using
  it to your best advantage;
• Testing your solution- comparing results with your
  classmates to see what works better;
         Research- Aerodynamics



 Air-
  – Is a type of fluid such as water that can be
    directed or displaced;
  – Has mass and is measured in terms of pressure;
  – Applies direct and frictional forces to objects in
    motion;
        Research- Aerodynamics
 You should be aware of four aerodynamic
  principles-
  –   Drag
  –   Lift/Down Force
  –   Drag Coefficient
  –   Frontal Area
       Research- Aerodynamics
 Drag is a combination of two forces that will
  work against the acceleration of your CO2
  car.
  – Frontal Pressure occurs when tiny molecules of air hit the
    front of your car and is forced away to make room for
    other molecules to hit it.
  – Rear Suction occurs when an empty pocket of air is
    created in the back of your car resulting in a vacuum
    cleaner effect that tries to pull your car backward.
Air Flow
Rear Suction
More on Suction
      Research- Aerodynamics
 Lift is similar to rear suction in that a thin
  empty pocket occurs as air passes over a flat
  surface causing the car to lift.
 Down Force is due to high pressure in curved
  surfaces that causes the car to be pushed
  down. (Up next, notice how the windshield
  takes the shape of a spoiler.)
Air Flow
Lift
Down Force
      Research- Aerodynamics
 Drag Coefficient is a way of expressing how
  slippery a car is.
 Here is a tip to increase your speed and lower
  your drag coefficient-
  (the more ways you can eliminate drag, turbulence,
    rear suction, lift and down force, the faster your
    car will go)
       Research- Aerodynamics
 Frontal Area is the total of all surfaces in the
  front of your vehicle which cause drag.
Review
Research- Physics
Research- Tribology

								
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