General / Off-Topic A wind driven car going faster than the wind ! :)

[WeComeInPeace]

This should get any good forum going

Source: https://youtu.be/jyQwgBAaBag


Pretty good empiric evidence / proof of concept. And once you understand how it works, pretty clever.

 

[Arry]

............and it looks so practical.

Better put to use on water, maybe?

 

[Morbad]

Harnesses power from the differential between the speed of the ground and the speed of the air, and I think the intro makes it seem less intuitive than it is. Still a neat vehicle though.

............and it looks so practical.

It looks like a lot of fun.

Better put to use on water, maybe?

High-end sailboats can already reach 2-3 times the speed of the wind when traveling perpendicular to the wind, but something like this might let one travel directly into the wind without tacking.

 

[WeComeInPeace]

Harnesses power from the differential between the speed of the ground and the speed of the air, and I think the intro makes it seem less intuitive than it is. Still a neat vehicle though.



It looks like a lot of fun.



High-end sailboats can already reach 2-3 times the speed of the wind when traveling perpendicular to the wind, but something like this might let one travel directly into the wind without tacking.

I must admit that to me it seemed like some variant of perpetual motion. That also was the reaction from some of the professors laughing at the whole idea, but empiric evidence proved them wrong. I personally like that

It's not very practical as is, but it's definitely as good a proof of concept as the early aeroplanes were. I doubt that we will see a freeway filled with wind driven cars, but the concept might find use elsewhere.

 

[Stigbob]

A vertical turbine might be more stable, you could also fit a few of them.

 

[WeComeInPeace]

A vertical turbine might be more stable, you could also fit a few of them.

The strange thing about the "car" above, is that the wind turbine is actually a propeller driven by the wheels due to the cars forward motion. The trick is that it is still able to extract energy from the wind, because the vehicle itself functions like a sail. I think the explanation at the end of the video is excellent, but I still intuitively feel that it's against any physics I have learned.

 

[Stigbob]

The strange thing about the "car" above, is that the wind turbine is actually a propeller driven by the wheels due to the cars forward motion. The trick is that it is still able to extract energy from the wind, because the vehicle itself functions like a sail. I think the explanation at the end of the video is excellent, but I still intuitively feel that it's against any physics I have learned.

Maybe I should have watched till the end .

 

[varonica]

A vertical turbine might be more stable, you could also fit a few of them.

A vertical turbine can't push air in a particular direction which this design requires. Normal propellers are only effective with wind from one direction which is why they often mounted on swivels, the vertical turbine doesn't require a swivel because wind from any direction will turn it, so it can't be used to push air in a particular direction, and this requires air to be pushed towards the rear of the vehicle to take advantage of the wind energy exchange to kinetic energy to drive forward.

So I don't think a vertical turbine would work.

 

[Arry]

A vertical turbine can't push air in a particular direction which this design requires. Normal propellers are only effective with wind from one direction which is why they often mounted on swivels, the vertical turbine doesn't require a swivel because wind from any direction will turn it, so it can't be used to push air in a particular direction, and this requires air to be pushed towards the rear of the vehicle to take advantage of the wind energy exchange to kinetic energy to drive forward.

So I don't think a vertical turbine would work.

....and using the Gyrocopter type of system?

 

[Morbad]

A vertical turbine can't push air in a particular direction which this design requires. Normal propellers are only effective with wind from one direction which is why they often mounted on swivels, the vertical turbine doesn't require a swivel because wind from any direction will turn it, so it can't be used to push air in a particular direction, and this requires air to be pushed towards the rear of the vehicle to take advantage of the wind energy exchange to kinetic energy to drive forward.

So I don't think a vertical turbine would work.

I think a vertical turbine could work, but it would need some other way of storing energy to get through that dead zone where air and ground speed were the same. A flywheel connected to the wheels, might work. Once the car stops accelerating as the relative wind velocity falls, the flywheel can be connected to the wheels to accelerate sufficiently ahead of wind velocity for the differential to make the turbine efficient again at which point it's reconnected to the wheels and the headwind allows it to maintain or increase velocity.

 

[Arry]

I watched the whole thing, but I guess, I should listen to it as well.