Rules of Physics.. (Page 2): That is pretty much the Jist I got out of it.... How come our learned physics professor did not catch on before he lost 10,000 dollars. ? I will have to go...

MrBob Loc: lookout Mtn. NE Alabama

letmedance wrote:

The rear wheels drive the turbine not the wind. The wind pushes the car forward causing the rear wheels to turn driving the turbine which propel the car faster as it bites into the prevailing wind.

That is pretty much the Jist I got out of it.... How come our learned physics professor did not catch on before he lost 10,000 dollars. ? I will have to go back and see what the Gurus, De Grasse and Nye thought about this before the test run... Did they miss the boat as well as the prof ?

TreborLow

I am not an expert, but I think there is some similarity to the sailboats which exceed the wind speed when going on a diagonal to the wind. Yes, spinnaker in the direction of the wind is limited to the wind speed, but the propeller on a wind turbine IS going at a diagonal to the wind and so it can push the wheeled vehicle faster than the wind. If the propeller was tiny, it wouldn't generate enough power, but a large enough prop should be able to do it. Think of the sailboat's regular sail as the wing of a plane held in the vertical plane. The lift the makes the plane fly (and there are some pretty heavy planes out there) is simply now vertical on the sailboat and pulls the boat forward. Not limited by wind speed, only the lift with pulls the boat forward. Nice to see some "know it all" lose $10k!

TreborLow

I am not an expert, but I think there is some similarity to the sailboats which exceed the wind speed when going on a diagonal to the wind. Yes, spinnaker in the direction of the wind is limited to the wind speed, but the propeller on a wind turbine IS going at a diagonal to the wind and so it can push the wheeled vehicle faster than the wind. If the propeller was tiny, it wouldn't generate enough power, but a large enough prop should be able to do it. Think of the sailboat's regular sail as the wing of a plane held in the vertical plane. The lift the makes the plane fly (and there are some pretty heavy planes out there) is simply now vertical on the sailboat and pulls the boat forward. Not limited by wind speed, only the lift with pulls the boat forward. Nice to see some "know it all" lose $10k!

letmedance Loc: Walnut, Ca.

SalvageDiver wrote:

Very interesting. Another very clever use of leverage. There are other very clever uses of leverage, such as ram pumps, which I learned about recently. These are pumps that can pump water uphill, indefinitely, without the use of any external power supply. Sounds like another perpetual motion machine?

The external power is the pressure of the uphill water source.

Mark Sturtevant Loc: Grand Blanc, MI

That was interesting! That wheel contraption that moves faster than the board pushing it was a real mind bender too.

stan0301 Loc: Colorado

I’ve seen that worked out for a sail powered ice boat

Abo

If they are talking about it going directly down wind, it can't be done.

As the vehicle attained the ground speed of the wind,
relative wind speed would be zero... ie. nothing to turn the
fan blades.

Ironic that it's easy to exceed the wind speed with a
yacht... going across the wind.

Edit: When I wrote the above I had not seen the video and presumed
one was to believe that the turbine drove the wheels.

However, having seen the video, it appears (as if) the wheels drive the turbine.

Abo

Mark Sturtevant wrote:

That was interesting! That wheel contraption that moves faster than the board pushing it was a real mind bender too.

No man... the sliding trays in your toolbox are a good example.
the bearings contained in the race move slower than the draw
as it is withdrawn from the box.

Ergo, if you push on the bearing race (instead of the draw, the draw travels
faster than the bearing race.

jerryc41 Loc: Catskill Mts of NY

Ollieboy wrote:

IMO anything involving "Bill Nye the science guy" has a credibility problem.

You're just jealous.

(Kidding, of course)

PhotogHobbyist Loc: Bradford, PA

I did pretty well in Math during my HS and college days, but that video and the explanations got ahead of me to the point that I did not fully understand it but the video is very interesting and the guy earned his 10,000 in my book. Now I'd like to see the explanation and results about the gears problem he posited.

DickC Loc: NE Washington state

Very interesting sir!

cucharared Loc: Texas, Colorado

Anybody have a link, or at least the title, to the original presentation? I’d sure like to see it based on posts in this thread. Thankie.
Ron

Linda From Maine Loc: Yakima, Washington

cucharared wrote:

Anybody have a link, or at least the title, to the original presentation? I’d sure like to see it based on posts in this thread. Thankie.
Ron

from a Google search

https://www.youtube.com/watch?v=yCsgoLc_fzI

https://www.youtube.com/watch?v=sVqjx8Gd7ZQ

https://www.businessinsider.com/youtuber-won-10000-bet-with-physicist-over-wind-powered-vehicle-2021-7

cucharared Loc: Texas, Colorado

Thanks
Ron

cucharared Loc: Texas, Colorado

Now THAT is darned interesting. Not the math - that’s way beyond me, but the concept and execution are terrific.
Ron