Direct Downwind Faster Than the Wind #1 (DDWFTTW)

[uRMoRitA]

hi um does any body have a step by step plan on how to make it plse need it for a project please...

[spork33]

@uRMoRitA I have a set of three detailed build videos. Look for them under spork33

[kaztros]

I don't understand people's problem with this. If you just use the analogs between electrical engineering and newtonian physics, it becomes obvious that any buck or boost regulator does the same task, and in the same fashion.

[spork33]

@kaztros

You don't even have to resort to E.E. Any lever literally does the same. We're just trading a larger force over a smaller distance for a smaller force over a larger distance. What could be simpler?

[Texmurphy51]

He holds the car, the propeller builds up Energy because its geared faster than the speed of the treadmill. The stored energy via flywheel in the propeller drives it forward a couple of inches. If left alone long enough it would fall back.

[spork33]

@Texmurphy51

Not so. You can see on our other videos that it will move forward, even climbing an incline. On one video we let it run for quite a while.

[Texmurphy51]

@spork33 Let me suggest this. replace the propeller with an equal size & weigh flywheel or just bend the props flat & see if it does the same thing. Bet it does.

[spork33]

@Texmurphy51

We have a 450 lb cart that stands 23' tall and carries me directly downwind at nearly 3X windspeed. It self starts from a dead-stop, and accelerates right through wind speed up to nearly 3X wind speed. We've done just about every test you might suggest.

[pandemik0]

If you are still having trouble understanding then consider this: Instead of the propeller spinning you have your hand on the mount for the prop, holding the vehicle in place. NOW what would happen to the drive wheels? Well, they spin don't they? You'd be able to extra useful power. The difference in speed is the angle of the prop allows it to do more than "grip the air" - the prop angles here work the same way a sailboat can move faster than the air speed AT A RIGHT ANGLE - the prop rotates!

[darnovic]

DDWFTTW is impossible. The only way for it to be possible would be to use a sail that travels perpendicular to the wind direction and can therefore experience constant acceleration. Which is impossible. Unless.......the sail is made rigid and accelerates around a pivot! How about two or three rigid sails that rotate around a pivot and power the wheels of the craft! By Jove! I have it, I shall call it the Propelorator! (I doubt someone else has thought of this, so I call dibs!)

[spork33]

Well, you're close, but the wheels turn the prop - not the other way around.

[clipper0udo2]

@spork33 I would have thought it went both ways, depending on the relative wind direction?

[goatpunch]

Really this is as simple and as counter-intuitive (at first) as the yo-yo along a table & cotton reel examples.

Basically the cart is being _pushed_ by the wind, and uses the rotation of the wheels to turn a propeller which pushes against the wind even more and allows it to move a little faster than the wind which is pushing it.

Most people seem to assume that they see a windmill (turbine) which powers the wheels.

[brixbrix]

great video! Don't forget to post your progress.

- A former sceptic

[Abrin19]

This is awesome. I suggest you make an instruction video on how to build this device. People are gooing to try and debunk this because its gooing to make them feel insecure. If they claim it cant be true because it seems to defy the "laws of nature" Well then screw the laws, cause then they obviously need an overhaul. Nature dosent use matematics or any other languge. Humans do. And humans allthough clever, makes misstakes. This is super cool. Make people buid this now!

[Sgrunterundt]

We couldn't do science without math.

This is not against any laws of nature.

If people claim it is against the laws of nature then the laws do not need an overhaul - those people do.

Yes, people certainly make mistakes, even very smart people does when it comes to DDWFTTW.

[equipmentandtrucks]

so whats the point.. a motorized treadmill is powering a wind turbine?

[spork33]

Not much point really.  It's just a demonstration that you can make a vehicle that is powered solely by the wind, that will go downwind, faster than the wind. It's just easier to put it on a treadmill than to find a perfectly straight road that's perfectly aligned with a perfectly steady wind.

[spork33]

One of the most basic principles of physics is the equivalence of inertial frames. This tells us that a road moving at 10mph in no wind is identical to a 10 mph wind over a road that isn't moving. In other words, this video accurately demonstrates a wind powered cart that goes downwind faster than the wind.

[hitssquad]

One important point is that the "still" air in the room has potential relative to the moving treadmill surface. The reason the device works is that the "still" air is pushed backward, and therefore reduces in potential relative to the moving treadmill surface.

Another important point is that the device couples the air to the road surface, and does so more efficiently - because it resolves the impedance-mismatch - than would a cart with a static sail.

[spork33]

I'll buy all that if you change "potential" to "kinetic energy".