CO2 Car Definitions

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CO2 Car Definitions

• This is the Vocabulary you need to know to make
  the best CO2 Cars

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Your goal in designing your car

• Design a car that is going to go FAST
• Design a car that LOOKS COOL
• Design a car that has a GREAT PAINT JOB

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You must make a parts list

• How much is your budget?
• What are you going to put on your car?

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What you get for FREE!!!
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You also get 4 wheels for Free
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Your choice of any 4 colors of paint

• You get to paint your car any color you want.
• You may not waste paint you must choose which
  colors you want before you paint.
• You must design your paint job before you paint.
• Paint cost 0.50

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That means that Mr. K is giving each of you FREE

• .

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Everything else is extra!
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Balsa wood is extra!

• Available in
• Standard triangle body 2X2X12
• Cost 5.00
• Rectangular Prism 3X3X12
• Cost 8.00

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Copy the following terms into your journal.
Leave about 3 lines between each one

• Guidance
• Guideways
• Propulsion
• Suspension

• Control
• Structure
• Support

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Guidance

• Information required to operate a vehicle or
  vehicular system in a prescribed path

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Guideways

• Pathways for transportation vehicles

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Propulsion

• The process of causing a body to move by exerting
  a natural or mechanical force

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Spinners are extra!
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Suspension

• The methods employed to suspend a vehicle in or
  on a given environmental medium

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Control

• Mechanical or automated procedures used to
  control a vehicle and/or vehicular system

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Structure

• Structural makeup and design of vehicles and
  other systems physical components

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Support

• Operation, maintenance, and regulation of total
  system

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10
5.00
8.00
1
4
5.00
18.00
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End of Day ONE

• If your notes are not complete, you will not be
  allowed to start working on your CO2 car.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Copy the following terms into your journal.
Leave about 3 lines between each one

• Acceleration
• Airfoil
• Camber
• Upper Camber
• Lower Camber
• Chord

• Relative Wind
• Angle of Attack
• Speed
• Velocity

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Acceleration

• The force involved in overcoming inertia (it
  means changing speed and/or changing direction)
• Accelerate - to increase in speed
• Decelerate - to decrease in speed

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Airfoil

• Any surface designed to obtain reaction such as
  lift from the air through which it moves

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Camber

• The curvature of an airfoil from the leading edge
  to the trailing edge
• Upper camber - curvature of upper surface
• Lower camber - curvature of lower surface

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Chord

• An imaginary straight line drawn from the leading
  edge to the trailing edge of an airfoil

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Relative Wind

• The direction of airflow produced by an object
  moving through the air (usually parallel with and
  in the opposite direction of the movement of the
  vehicle)

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Angle of Attack

• The angle between the chord line of the wing and
  the direction of the relative wind.

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Speed

• The distance traveled in a certain time
• Speed Distance / Time

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Velocity

• The speed or rate of movement in a certain
  direction.

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End of Day TWO

• If your notes are not complete, you will not be
  allowed to start working on your CO2 car.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Copy the following terms into your journal.
Leave about 3 lines between each one

• Lift
• Weight
• Thrust
• Drag

• Types of Drag
• Parasite Drag
• Form Drag
• Skin Drag
• Interference Drag

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Lift

• Upward acting force created when an object moves
  through the air

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Weight

• (Gravity) - Downward acting force which pulls
  objects to the earth

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Thrust

• Forward acting force that pushes or pulls object
  through the air

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Drag

• Rearward acting force (retarding) which resists
  the forward movement of an object through the
  air.

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Parasite Drag

• The resistance of the air produced by any part of
  the object that does not produce lift.

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Form Drag

• Is caused by the frontal area of the objects
  components being exposed to the airstream. (This
  is why streamlining is necessary)

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Skin Drag

• Is caused by air passing over the objects
  surfaces, and increases considerably if the
  object surfaces are rough and dirty

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Interference Drag

• The interference of the airflow between adjacent
  parts of the object such as the intersection of
  cartridge body and wheel sections with the main
  body

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Factors Affecting Parasite Drag

• The more streamlined an object is, the less
  parasite drag
• The more dense the air moving past an object, the
  greater the parasite drag
• The larger the size of the object in the
  airstream, the greater the parasite drag
• As speed increases, the amount of parasite drag
  increases (if speed is doubled, four times as
  much drag is produced)

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IMPORTANT NOTE FOR STUDENT!!!

• Make an effort to increase the performance of
  your vehicle.
• Increase the efficiency of the desirable forces
  lift and thrust.
• Reduce, as much as possible, the undesirable
  forces weight and drag.

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IMPORTANT!!!

• It is the total drag that determines the amount
  of thrust required at a given airspeed.
• In other words, the more drag produced by your
  design
• THE SLOWER YOUR CAR!

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End of Day THREE

• If your notes are not complete, you will not be
  allowed to start working on your CO2 car.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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