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Aerodynamics CO2 Dragster. Aerodynamics:. Is the study of Air Flow around a moving vehicle. Good Aerodynamics offer the least resistance. Aerodynamics address four main areas of concern. (Frontal Pressure, Lift/Down Force and Drag.) . Drag. Enemy of race cars.

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Presentation Transcript
slide1

Aerodynamics

CO2 Dragster

aerodynamics
Aerodynamics:
  • Is the study of Air Flow around a moving vehicle.
  • Good Aerodynamics offer the least resistance.
  • Aerodynamics address four main areas of concern. (Frontal Pressure, Lift/Down Force and Drag.)
slide3
Drag

Enemy of race cars.

Drag, is comprised primarily of two forces, Frontal Pressure and Lift / Down Force.

These forces if not taken care of by good aerodynamic features can ruin a cars performance.

frontal pressure and rear vacuum
Frontal Pressure and Rear Vacuum

Frontal Pressure is caused by the air attempting to flow around the front of the car.

Rear Vacuum is caused by the "hole" left in the air as the car passes through it.

lift down force
Lift/Down Force

Down force is the same as the lift experienced by airplane wings, only it acts to press down, instead of lifting up.

Not to be forgotten, the underside of the car is also responsible for creating a good amount of down force.

aerodynamics in action
Aerodynamics in Action

Audi A4 Aerodynamics Demonstration

http://www.dailymotion.com/video/xrsf0_pub-audi-a4-aerodynamics-windtunnel_auto

http://www.tiz1.com/audi-a4-cars-2-videos/?tubepress_id=lg7N-HiPTRk

aerodynamic tips
Aerodynamic Tips
  • Have a minimized frontal area / small grill, to minimize frontal pressure.
  • Have minimal ground clearance below the grill, to minimize air flow under the car.
  • Converge Bodywork Slowly. Bodywork which quickly converges, forces the air flow into turbulence, and generates a great deal of drag.
  • Have a sloped windshield to avoid pressure build up in front.
  • Have a "Fastback" style rear window and deck, to permit the air flow to stay attached. (Ideally 10° to 30°)
  • Have a converging "Tail" to keep the air flow attached.
  • Have a slightly raked underside, to create low pressure under the car.
  • Cover Open wheels.Open wheels create a great deal of drag and air flow turbulence, similar to the diagram of the mirror above.
current land speed record
Current Land Speed Record
  • Thrust SSC
  • 763MPH at Black Rock Desert in Nevada, USA, on 15 October 1997.
  • Driven by Andy Green