Downwind faster as the wind, selfaccelerating runner

[exnihiloest]

Hi All,
have a look at this amazing selfaccelerating propeller device:


http://peswiki.com/index.php/Directory:Directly_Downwind_Faster_than_the_Wind


Regards, Stefan.

Hi Stefan and all,

After some discussions on fr.sci.physique, and refering to other studies on the web back to 2006, it appears clearly that the device really works and it do it according to physics laws.

Here is how we can see the system, it is simple:
As the propeller and the wheels are coupled, what makes the prop to rotate is only the motion of the device.
When the wind pushes the device, it starts rolling thus the prop rotates and "blows" backward. As it blows backward the reaction force leaning on the wind pushes the device forward and its speed increases beyond the wind speed.

Another simple way to view the device is to do an equivalent with electricity. Here is how it works by replacing "speed" by "voltage".
Consider wind energy as an electric generator of 5v ("wind speed") and the device as a capacitor charged at 10v ("device speed"), voltages refering to the earth. The problem is to increase still more the capacitor charge from the 5v generator. Easy: you just have to add another 10v generator between the "wind generator" and the device, you will get 15v. From the viewpoint of the device which is at 10v, there is 5 remaining and usable volts without drawing from the 10v generator. The backward blowing prop plays the role of the 10v generator, a kind of "potential gap" or bridge between two referentials at different speeds, allowing to exploit the wind energy from frames of reference at any speed.

Such a device could also be designed to go against the wind.
In conlusion we see that this smart device always needs there is a wind speed  > 0 (refering to the earth), which is the only energy source. It is not an OU device.

[sparks]

     An airplane moves forward in a tailwind.  The propeller creates a low pressure area just in front of the blade.  This pressure differential causes the blade to be pushed into this cavity by the surrounding pressure.  The plane therefore moves forward in the inertial frame of the tailwind.  The same effect is utilized by the wings to provide lift.  It also allows a sailboat to go against the wind.  What is interesting here is that the wheels of the unit are used as a motor to drive the prop.  The inertial gain of the device is input from the kinetic energy of the wind as observed by the Earth.  By placing the wheels in the inertial frame of the Earth the wheels now observe the kinetic energy of the wind and in this device convert it to work on the prop.  No wind no move.

[PYRODIN123321]

@ sparks

i agree no wind-no go

a cleaver little wind powered device- a little misleading on the tread-
in place of the wind the tread provides the power for wheels and in turn the prop , in a head wind the prop powers the wheels, the more head wind the more power the prop diverts to the wheels like a reverse sail instead of the wind pushing, it pulls into the wind
the extra wind/power from acceleration is used by the prop instead of being wasted as air resistance-no OU just efficient
with a payload i think it would have to be very aerodynamic-eventualy you will reach terminal velocity via ground resitance and air resistance

this would indeed be cool with a coanda type setup and some of viktor schauburger(dont know if i spelled right) concepts in mind

[icanbeatbob]

If this thing fell straight down with the prop pushing downwards ,and of course, allowing the wheels to spin to create the prop movement, I wonder how much speed difference there would be,as oppose to just falling without the wheels spinning, assuming it fell facing the same way?

With this scenario, it would be better with much less air resistance I presume.

Brad

[TechStuf]

Yes, obviously the device is egg on the face of many of many "lettered men".   Of course, they have more than master's degrees.  Many are also masters at avoiding their greater selves...so much so, that many will refuse to step outside and look at the light.  It hurts too much.


"I thank You, O Father, Lord of heaven and earth, because You have hid these things from the wise and prudent, and have revealed them unto babes." - Yeshua, Jesus Christ


Many a self assumptive fool leans long and hard upon his own feeble understanding, puffery and reputation, so all that remains for them is the cobwebbed corners into which they have masterfully painted themselves. 


That?  Oh that will never work!   It works?  Well of course it works, and is perfectly explainable.


Notice the emptiness between point A and point B.


What a life......ouch.



TS