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Electroboom: How Right IS Veritasium?! Don't Electrons Push Each Other??
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SiliconWizard:
Are those electrons free?
gnuarm:

--- Quote from: electrodacus on July 11, 2022, 06:38:08 pm ---
--- Quote from: gnuarm on July 11, 2022, 06:25:01 pm ---
No, as is shown in this example, the same leverage is gained by a mechanism that pushes the sail toward the wind on the car.  That's what tacking is doing, providing leverage to allow a vehicle to travel into the wind.  No tacking is needed nor is helpful in traveling down wind.  Using a fixed sail, a vehicle can not travel down wind faster than the wind.  Install a moving sail or a propeller, and you can travel down wind.

You are a troll.  You are a blatant, obvious troll.  You will never admit to understanding what is going on here.  The only reason you are posting is to get people to respond to you. 

I should stop feeding the troll.

--- End quote ---

Need to correct my example as it was wrong. If sail moves at 2.5m/s relative to the ground when it is above it will move at 17.5m/s when under so the average is 10m/s


Tacking will not be considered direct down wind and had nothing to do with your example or direct down wind blackbird.

When traveling at an angle to wind direction vehicle speed with low enough friction will exceed wind speed.
What happens in that case is that vehicle kinetic energy will be the energy storage device and in ideal case with no friction all you need to do is exceed wind speed at an angle to wind direction then turn directly downwind and maintain that high speed as there is no friction to slow you down.
In real world where there is friction you will need to travel in zig-zag (Tacking) witch is not direct down wind as you still use energy storage but in this case you can take advantage of the existing kinetic energy of the vehicle and used that to store energy.

--- End quote ---

Blady, blah, blah, blah.  Blady,  blah, blah, energy storage, blah, blady, blah, blah.

It really is hard to tell if this guy is mental, or if he really is this poorly educated.  He claims to have some tech job, but that's really, really hard to imagine. 

Whatever...
gnuarm:

--- Quote from: SiliconWizard on July 11, 2022, 07:41:46 pm ---Where have the electrons gone?

--- End quote ---

Long time passing.
Naej:

--- Quote from: electrodacus on July 11, 2022, 07:43:22 pm ---
--- Quote from: Naej on July 11, 2022, 07:37:08 pm ---It's a good start, but on which isolated system are you applying it?

Why with 100W brought by gears and 1000W in wind, I can't get 300W in propulsion?

--- End quote ---

You have two choices

a) Use the entire 1000W from wind as propulsion directly best case if what you want is to accelerate the vehicle.
b) Take 100W at the wheels so 1000W - 100W = 900W of wind propulsion plus the 100W * 0.7 = 70W from propeller total 970W worth of propulsion.
The b) assumes a 70% efficient propeller and assumes non compressible fluid.

--- End quote ---
So you agree that you can get much more propulsion out of the propeller than what you took from the wheels, thanks to the wind?
Nice, now you can understand why you can go faster than the wind  8)
electrodacus:

--- Quote from: SiliconWizard on July 11, 2022, 08:08:20 pm ---Are those electrons free?

--- End quote ---

Yes.
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