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

--- Quote from: electrodacus on December 30, 2021, 06:43:45 pm ---It is clearly seen form the equation that I constantly post here.
--- End quote ---

Unfortunately, regardless of your claims your equation does not apply to the Blackbird-type vehicles, where there is a propeller connected to wheels rolling on the ground.
electrodacus:

--- Quote from: Brumby on December 30, 2021, 11:55:53 am ---Other people call it thrust - and you call it a pressure differential - but the question is on the energy storage.

Rather than running around with words - where we all seem to get nowhere - it would make life so much easier if you could provide the formula which tells us how much energy is stored.

--- End quote ---

If this was a non compressible fluid like water then there will be no pressure differential and no energy storage just thrust.
Simplest analogy that I can think of right now and it is visual enough will be pushing a vehicle with another vehicle having just a solid bar connecting them (non compressible fluid like water) or having a spring between them (compressible fluid like air).
The spring is an energy storage device and it is moving together with the pushed vehicle. As any analogy it has limitations but a compressible fluid can be used to store energy and a propeller can be used to increase the pressure differential thus energy can be stored.

This may be hard for some to understand as most will think that there is no way to maintain this pressure differential and there is not much I can do about this.
The main point I want to make since this is ester to understand (at least is what I was thinking) is that there is no wind power available to a direct down wind traveling at or above wind speed.
I provided the correct equation and anyone that is not agreeing with that equation is welcome to provide the correct one.
Nobody can claim to understand a wind powered only vehicle without being able to provide an equation describing the amount of wind power available to vehicle. 
electrodacus:

--- Quote from: fourfathom on December 30, 2021, 06:57:42 pm ---Unfortunately, regardless of your claims your equation does not apply to the Blackbird-type vehicles, where there is a propeller connected to wheels rolling on the ground.

--- End quote ---

It applies to any wind powered vehicle and if you disagree post the one that you think applies to blackbird.
The energy storage is a separate equation and it is not relevant since I claim energy storage is involved and you claim that vehicle needs no energy storage and it is powered directly by wind power.
I showed the correct wind power equation (ideal case) and it shows that at wind speed there is zero power available to any wind powered vehicle.
fourfathom:

--- Quote from: Brumby on December 30, 2021, 11:55:53 am ---Other people call it thrust - and you call it a pressure differential
--- End quote ---

No, he is considering the spinning propeller as effectively being a static sail, and somehow pressure-differential is being "stored" behind it while the vehicle is moving below windspeed.  This is not the same thing as thrust.  (I don't think it's a thing at all.)
IanB:

--- Quote from: electrodacus on December 30, 2021, 06:33:30 pm ---Have you not seen the (w-v)3 in enough places ? It is basically everywhere.
--- End quote ---

If it occurs basically everywhere, can you point to one credible reference other than yourself that contains that equation?

As I recall, we have not seen any references yet. When you went to find one in Wikipedia and it wasn't there, you decided Wikipedia was wrong.
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