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Thread: GM: Volt will get 230 miles per gallon

  1. #151
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    Re: GM: Volt will get 230 miles per gallon

    Why don't they just put a scoop in the hood and on both sides of the car, in the doors, that scoops the air as the car is cruising down the road and have that air turn a little "windmill" that creates it's own electricity to recharge the batteries. Two sets of batteries. One in use, one charging.

    Sounds too easy. Surely they have already considered that.

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    Re: GM: Volt will get 230 miles per gallon

    Quote Originally Posted by Captain America View Post
    Why don't they just put a scoop in the hood and on both sides of the car, in the doors, that scoops the air as the car is cruising down the road and have that air turn a little "windmill" that creates it's own electricity to recharge the batteries. Two sets of batteries. One in use, one charging.

    Sounds too easy. Surely they have already considered that.
    My guess would be the drag would decrease the efficiency, not to mention the added weight.

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    Re: GM: Volt will get 230 miles per gallon

    Quote Originally Posted by Dittohead not! View Post
    Right on.

    And it 's good to find someone who at least understands my somewhat twisted sense of humor. I thought you might have a sense of humor also, given your username.
    Unfortunately internet forums are not the place to look for intelligence and humor (this one possibly being the exception). I do have to say there seems to be an equal amount of intelligent members on this as there are totally batty ones. It's kind of refreshing.

  4. #154
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    Re: GM: Volt will get 230 miles per gallon

    Quote Originally Posted by Rightwingnutjob View Post
    My guess would be the drag would decrease the efficiency, not to mention the added weight.
    I don't know 'bout that. You know how hard the wind pushes your hand when you stick it out the window going 60. The drag is already present due to the cars body. Routing the air past a fan, that will turn with the wind, rather than just a bulkhead drag, seems to me might create less drag than the already created drag, by design. I wish I knew how to explain it better. I am certain some drag would be created. But I think the benefits will overcome the drag. Maybe. I dunno. Just a thought.

    Hey, it works for windmill farms. Why not cars?
    Last edited by Captain America; 08-02-10 at 11:35 PM.

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    Re: GM: Volt will get 230 miles per gallon

    Quote Originally Posted by Captain America View Post
    I don't know 'bout that. You know how hard the wind pushes your hand when you stick it out the window going 60. The drag is already present due to the cars body. Routing the air past a fan, that will turn with the wind seems to me to create less drag than the already created drag by design. I wish I knew how to explain it better. I am certain some drag would be created. But I think the benefits will overcome the drag. Maybe. I dunno. Just a thought.

    Hey, it works for windmill farms. Why not cars?
    Wind mill farms don't need to use nergy to move about the farm. In order to create enough energy the turbines would need to have significant resistance. They wouldn't be able to just move freely. While I'm still not sure, I'm thinking the drag is still the reason along with the added weight of such parts.

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    Re: GM: Volt will get 230 miles per gallon

    You think a 5 inch fan would create tha much drag? I'm turning my little fan next to my desk and it almost turns freely. Perhaps you're right. I have long been told that perpetual energy is an impossibility. Maybe a fan connected to the rotor in the generator might actually cause too much drag, come to think of it. But if we can put a man on the moon.....

    Or, maybe just make the fan a spiral type, turbine fan, rather than a wide blade and gear it properly? I can't imagine that the fan and it's small generator would weigh too much more than a gallon of gas.
    Last edited by Captain America; 08-02-10 at 11:49 PM.

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    Re: GM: Volt will get 230 miles per gallon

    Quote Originally Posted by Captain America View Post
    Why don't they just put a scoop in the hood and on both sides of the car, in the doors, that scoops the air as the car is cruising down the road and have that air turn a little "windmill" that creates it's own electricity to recharge the batteries. Two sets of batteries. One in use, one charging.

    Sounds too easy. Surely they have already considered that.
    Quote Originally Posted by Rightwingnutjob View Post
    My guess would be the drag would decrease the efficiency, not to mention the added weight.
    Quote Originally Posted by Captain America View Post
    I don't know 'bout that. You know how hard the wind pushes your hand when you stick it out the window going 60. The drag is already present due to the cars body. Routing the air past a fan, that will turn with the wind, rather than just a bulkhead drag, seems to me might create less drag than the already created drag, by design. I wish I knew how to explain it better. I am certain some drag would be created. But I think the benefits will overcome the drag. Maybe. I dunno. Just a thought.

    Hey, it works for windmill farms. Why not cars?
    The Nutjob is correct

    For a "windmill" on a car to produce any electricity worthwhile would cause so much drag that the car would consume the energy it had stored and the energy it was creating just to move. It would drain the batteries extremely fast.

    The same issue is if you are on a sail boat using a huge fan (the fan would be on the boat) to blow on the sails, the two effects would largely cancell each other out
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    Re: GM: Volt will get 230 miles per gallon

    Quote Originally Posted by Captain America View Post
    You think a 5 inch fan would create tha much drag? I'm turning my little fan next to my desk and it almost turns freely. Perhaps you're right. I have long been told that perpetual energy is an impossibility. Maybe a fan connected to the rotor in the generator might actually cause too much drag, come to think of it. But if we can put a man on the moon.....

    Or, maybe just make the fan a spiral type, turbine fan, rather than a wide blade and gear it properly? I can't imagine that the fan and it's small generator would weigh too much more than a gallon of gas.
    Okay so maybe weight isn't a fact. You can turn your fan easily because they designed it that way. It USES energy to turn the fan rather than the other way a round. To turn the generator though there would be resistance (a lot more than your just turning your fan). Still speculation but grounded in reason and what I know of thermodynamics.

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    Re: GM: Volt will get 230 miles per gallon

    Quote Originally Posted by Lord Tammerlain View Post
    The Nutjob is correct

    For a "windmill" on a car to produce any electricity worthwhile would cause so much drag that the car would consume the energy it had stored and the energy it was creating just to move. It would drain the batteries extremely fast.

    The same issue is if you are on a sail boat using a huge fan (the fan would be on the boat) to blow on the sails, the two effects would largely cancell each other out
    RWNJ is right a LOT of the time.

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    Re: GM: Volt will get 230 miles per gallon

    Quote Originally Posted by Captain America View Post
    You think a 5 inch fan would create tha much drag? I'm turning my little fan next to my desk and it almost turns freely. Perhaps you're right. I have long been told that perpetual energy is an impossibility. Maybe a fan connected to the rotor in the generator might actually cause too much drag, come to think of it. But if we can put a man on the moon.....

    Or, maybe just make the fan a spiral type, turbine fan, rather than a wide blade and gear it properly? I can't imagine that the fan and it's small generator would weigh too much more than a gallon of gas.
    Your fan turns freely because it is not generating electricity. If it had generators on it, each revolution would require energy, that would be the "drag from the motor. Then you have the increased drag, either through increased frontal area, and or creating a more turbulent airflow. Either way a fan on the exterior of car would require more energy then it would produce when the vehicle is moving. If the car was stationary and the wind was blowing, you will get free energy
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