Building the Vehicle Physicists Called Impossible (feat. Veritasium), OverUnity?

[tinman]

tinman
Nice video, however I would have liked an explanation as to how the cart and gearing was setup. For example, to say this wheel here turns this gear which then drives this other wheel here at this rpm based on this gear ratio here which then does this. To spell out exactly what was done, the reasoning behind it and the intended result.

My observations were that since the two cart wheels on the turn table cannot turn at different speeds it can be inferred that the inner turn table cart wheel is geared to turn the outer wheel on the static table top. A rough guesstimate would be for each rotation of the turn table the cart moves 1/8 the distance on the static table thus a 1:8 gear ratio.

Realistically, it doesn't matter which direction the cart moves. We could gear it down at which point the cart appears to move opposite to the turn table as you have shown. Or we could gear it up and have the cart move faster than the turn table in the direction of the turn table. Which is all the down wind faster than the wind cart does in reality.

In effect, on your cart if you swapped the big and little gear on the axles from 1:8 to 8:1 and added an idle gear between the big/little gear to reverse the direction it should move faster than the turn table in the direction of the turn table. Of course, it's up to you but I think it would be a good follow up video. As if to say, you thought that was impressive, watch this...

AC

Going against the rotation of the turn table, was just another way to show the prop driven cart going up hill against the fall of the treadmill. We could gear it anyway we like, and make it go in any direction we like, but it shows nothing out of the ordinary.
Going down wind faster than the wind, is nothing out of the ordinary. The wind is the power source, and we have just geared it up.
It's the very same as your foot moving very slowly forward in relation to the bike, when you're in top gear, but very fast in relation to the road. So while your foot (wind) is moving slowly forward in relation to the bike (wind vehicle), in both cases, the road is moving very quickly. The propeller on the DWFTTW vehicle, is just a rotating sail, where it's surface is moving down wind slower than the vehicle, due to the blades angles, and the fact that it is rotating.

[TommeyReed]

Hi All,

This is my update on this serious experiment build.

Will it go fast enough where the rotary table is stop and the 3 wheel trike keeps going faster.

https://www.youtube.com/watch?v=FAdavp0OIxg

Tom

[tinman]

Hi All,

This is my update on this serious experiment build.

Will it go fast enough where the rotary table is stop and the 3 wheel trike keeps going faster.

https://www.youtube.com/watch?v=FAdavp0OIxg

Tom

Looking good Tom.
Can't wait to see it go.

[TommeyReed]

Hi All,

First test run.

https://www.youtube.com/watch?v=oEiVZZ3bwvw

Tom

[kolbacict]

Probably it will be working in the water as well.