How to Reduce Air Drag for Vehicles?

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Discussion Overview

The discussion centers on methods to reduce air drag for vehicles to improve fuel efficiency. Participants explore various ideas and concepts related to the physics of air resistance and its impact on vehicle performance.

Discussion Character

  • Exploratory, Debate/contested, Conceptual clarification

Main Points Raised

  • One participant proposes using an on-board high-voltage generator to charge metal plates on the vehicle, suggesting that this could push air molecules away and reduce drag.
  • Another participant questions the feasibility of this approach, arguing that the energy required to power the electrodes may negate any savings from reduced drag.
  • A different participant suggests a simpler method of reducing drag by driving at slower speeds, implying that this could be a more practical solution.

Areas of Agreement / Disagreement

Participants express differing views on the effectiveness of the proposed high-voltage generator method, with some skepticism about its practicality. There is also a contrasting suggestion of simply driving slower as a means to reduce drag, indicating a lack of consensus on the best approach.

Contextual Notes

The discussion includes assumptions about the efficiency of the proposed methods and the relationship between speed and air drag, which remain unresolved.

4beowulf7
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Hello everyone!

I was thinking about how to reduce air drag for a vehicle so that one gets better mileage.

Here is the definition of the problem:
A moving car faces air drag especially at high speed. The resistance of the air layers would try to slow down the car. In order to maintain the same speed, the driver has to press the gas pedal continuously. So, if the air drag can be reduced, the mileage would improve.

So how can we reduce air drag?

What if an on-board high-voltage (HV) generator is used?

The HV generator charges the strategically located metal plates over the vehicle of interest. When the plates are positively charged, the air molecules in the vicinity of the plates are also positively charged (electrons pass to the plates leaving positively charged air molecules behind). Now the plates push the air molecules away so they can never hit the metal plates. Therefore, it is possible to reduce the air drag for a vehicle by using this technique.

What do you think?

Greetings
 
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4beowulf7 said:
Now the plates push the air molecules away so they can never hit the metal plates.
Both generates a force on the plates.
 
I don't see how that would reduce drag. Even if it did, you are now using probably all of your power savings from the drag to supply power for your electrodes.
 
4beowulf7 said:
Hello everyone!

I was thinking about how to reduce air drag for a vehicle so that one gets better mileage.

Here is the definition of the problem:
A moving car faces air drag especially at high speed. The resistance of the air layers would try to slow down the car. In order to maintain the same speed, the driver has to press the gas pedal continuously. So, if the air drag can be reduced, the mileage would improve.

So how can we reduce air drag?

Drive slower.

Zz.
 
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