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Electroboom: How Right IS Veritasium?! Don't Electrons Push Each Other??

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Naej:

--- Quote from: electrodacus on July 11, 2022, 09:23:05 pm ---
--- Quote from: Naej on July 11, 2022, 09:07:02 pm ---If you remove the propeller you have 1000W of wind power above your car, and 0W in propulsion… because it's above your car.
If you add the propeller, geared to the wheels you get (at least according to you) 970W in propulsion, and removing the 100W in the wheels you get a nice acceleration.

--- End quote ---
You can remove the propeller and replace with a sail of equivalent area to get 1000W of wind power that accelerates the vehicle.

--- End quote ---
Wrong.
If the car speed is larger than the wind speed, then with a 1000W wind power, a sail can only brake, for example with 500W (for example).
While with a propeller you get propulsion (970W according to you).

electrodacus:

--- Quote from: Naej on July 11, 2022, 09:35:46 pm ---
Wrong.
If the car speed is larger than the wind speed, then with a 1000W wind power, a sail can only brake, for example with 500W (for example).
While with a propeller you get propulsion (970W according to you).

--- End quote ---

If the car speed is higher than wind speed direct down wind there is no wind power available to accelerate that vehicle.
Pw = 0.5 * air density * area * (wind speed - vehicle speed)3

Naej:

--- Quote from: electrodacus on July 11, 2022, 09:50:24 pm ---
--- Quote from: Naej on July 11, 2022, 09:35:46 pm ---
Wrong.
If the car speed is larger than the wind speed, then with a 1000W wind power, a sail can only brake, for example with 500W (for example).
While with a propeller you get propulsion (970W according to you).

--- End quote ---

If the car speed is higher than wind speed direct down wind there is no wind power available to accelerate that vehicle.
Pw = 0.5 * air density * area * (wind speed - vehicle speed)3

--- End quote ---
Wrong.
Pw approximately equal to 0.5 * air density * area * wind speed2 * |wing speed - car speed|
Do you disagree with the famous kinetic energy formula 1/2*m*v^2 or do you disagree with the mass flow?

electrodacus:

--- Quote from: Naej on July 11, 2022, 10:00:34 pm ---Wrong.
Pw approximately equal to 0.5 * air density * area * wind speed2 * |wing speed - car speed|
Do you disagree with the famous kinetic energy formula 1/2*m*v^2 or do you disagree with the mass flow?

--- End quote ---

I do not disagree with kinetic energy formula. I disagree with the formula you invented for wind power.
Will you say that your formula is universal for any type of wind powered vehicle ?

Naej:

--- Quote from: electrodacus on July 11, 2022, 10:10:24 pm ---
--- Quote from: Naej on July 11, 2022, 10:00:34 pm ---Wrong.
Pw approximately equal to 0.5 * air density * area * wind speed2 * |wing speed - car speed|
Do you disagree with the famous kinetic energy formula 1/2*m*v^2 or do you disagree with the mass flow?

--- End quote ---

I do not disagree with kinetic energy formula. I disagree with the formula you invented for wind power.
Will you say that your formula is universal for any type of wind powered vehicle ?

--- End quote ---
So you disagree with air mass flow approximately equal to area * density * relative speed?
Interesting. Why? What's your opinion on the subject and can you substantiate it?

It applies to all vehicles where you have air flowing through an area. So don't apply this to sails.

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