ForeverCar

[g4macdad]

Here is the deal ...

Unfortuneately Pese is right ... The more drag the more power you need to move it...

But there is a design which I have thought of a couple of years ago ... With wind...

Anytime you are slowing down it does not matter how much drag you use because your objective is to come to a stop.

Now the tesla roadster uses this in the wheels or axel when breaking they generate energy...

A similar design could be done with wind!

How you ask the answer is simple in all the doors and the front bumper you could have tubes with fans in them that open as soon as the breaks are depressed and close as soon as you step on the gas again. This would generate free power for your car  ...

The maximal efficiantcy that one can get while slowing to a stop  is the maximal additional energy that you can recieve other then the heat losses that you could conserve using the electric motor.

Solar Paint and solar sun roofing or windows would be another way to make your car more efficiant as well.

But yes the amount of drag placed on this design is equal to the amount of energy gained if not less energy.

Here is the REAL deal....

There is something called momentum. There are also things called hills. I could make positive assumptions all day. But until I KNOW for sure I will assume(by opinion) this thing can put energy back into the batteries. Until you come up with real tested(by you) documentation, I will retain my assumptions.

[TheNOP]

Here is the REAL deal....

There is something called momentum. There are also things called hills. I could make positive assumptions all day. But until I KNOW for sure I will assume(by opinion) this thing can put energy back into the batteries. Until you come up with real tested(by you) documentation, I will retain my assumptions.

when one base himself on physic laws, the only assumption he make are :
he didn't forgot one, or more, of them in his calculations.
or that he did took into account the special cases, where/when they apply.

[g4macdad]

when one base himself on physic laws, the only assumption he make are :
he didn't forgot one, or more, of them in his calculations.
or that he did took into account the special cases, where/when they apply.

The assumption, I can see now, is that this is supposed to be over unity. This is in the electric car forum. That does not imply over unity. All this idea needs to do here is increase milage substantially to be relevant here.

[TheNOP]

The assumption, I can see now, is that this is supposed to be over unity. This is in the electric car forum. That does not imply over unity. All this idea needs to do here is increase milage substantially to be relevant here.

my point is that you can calculate the results without making a bunches of assomptions.
the only assomption you will make at the end is that you didn't forgot anything.

momentum mean the the energy level will stay at same level unless an external force is apply, positively or negatively.
so.
momentum = momentum energy
momentum + drag = need more energy to keep the same velocity.
momentum + drag + hill = depends on the hill angle and the drag, whitch is in function of the velocity.
if drag energy > hill energy then it = still need energy = difference of both energies.
since you still need energy, you won't be able to store any energy back without losing velocity.
like you can see here, what might work in some cases might not work all the time.

the wind drag is in direct relation to the energy used to stay at a fixed velocity.
that mean that for something to work like in the video of reply #13
the natural earth wind blow must always come from the front for it to work.
the wind generated by the fan in that video is not the same as the wind drag on a car.
the wind drag is caused by the velocity of the car, it is not something that happen for free, energy is needed to fight it back.

you don't have to beleive me.
all the force at play can be calculated.
even for the methods used to harness the energy back.
ex: regenerative bracking efficientcy > wind generator efficientcy.

and since the efficientcy of a wind generator is so low, it might not even give enough energy back to fight it own surface drag.

[sm0ky2]

i think the only important factor is,.. can it get you from point A to point B without costing 26 cents per mile?