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Mess with your minds: A wind powered craft going faster than a tail wind speed.

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PlainName:

--- Quote ---Serious question:  How do you store energy in air which is not contained in any way?
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Air compresses, so although the storage is leaky (and then some) isn't there some brief storage?


--- Quote --- If you are not convinced by my correct calculations
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Can you tell me which post your calculations were shown in? So far as I can recall, your 'calculations' are basically descriptions and where actual figures are concerned you don't show the workings that got to those.

electrodacus:

--- Quote from: cgroen on August 30, 2021, 05:49:44 pm ---The pole you are getting up on is getting very high, remember the distance to fall is also getting longer all the time.....

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I'm not guessing that it will not work I know that vehicle in my diagram can only move from right to left no matter what you do to the vehicle unless you add energy storage or some energy source other than the treadmill.

All experiments you seen before has the vehicle flipped and that changes everything. The experiment needs to be setup as in my diagram.



What was demonstrated is if you lift the M wheel and rotate 180 degree so that motor wheel and red box are not on the other side of the treadmill but you do not change anything else and that if you can not see is a very different system.



--- Quote from: Brumby on August 30, 2021, 05:57:45 pm ---Serious question:  How do you store energy in air which is not contained in any way?

Your previous hand-waving and "intuition" has not been informative, let alone convincing.

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If I can not convince you that the above vehicle in my diagram can only move from right to left not sure what chance I have explaining how pressure differential energy storage works.
The simple answer is that air is a compressible material so when you try to push yourself against air like with a propeller/fan you are creating higher pressure on one side and lower pressure on the other side (higher and lower density of air molecules) so is like compressing a spring on one side and stretching a spring on the other side.  This will want to get back to equilibrium but as long as propeller rotates this pressure differential is maintained.
And if somehow you understand how an inductor stores energy then this will be as good as analogy as anyone can get. With inductor storing energy in the magnetic field around the coil and if you stop the current flow or better reduce the current flow trough inductor this magnetic field will collapse to try and maintain the current flow.

I posted before the diagram from Wikipedia that shows the pressure differential for an axial fan. You an see P1 and P2 is much higher than PA (ambient pressure) and keep in mind Blackbird has a huge propeller with a sweep area of about 20m^2 and all that vehicle needs to accelerate from 10mph to 28mph in that record is about 6Wh so half the energy contained in a modern smartphone.


PlainName:

--- Quote ---Can you cite any examples
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Musical wind instrument?

PlainName:

--- Quote ---All experiments you seen before has the vehicle flipped and that changes everything
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You keep saying that. Why does it change everything? And in what way?

bdunham7:

--- Quote from: dunkemhigh on August 30, 2021, 06:14:51 pm ---Air compresses, so although the storage is leaky (and then some) isn't there some brief storage?

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Very brief.  Differences in pressure in uncontained air will dissipate at the speed of sound....


--- Quote ---Musical wind instrument?

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Well, like I said... :)

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