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

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PlainName:

--- Quote ---You get that the air molecules can no longer hit the vehicle when both the vehicle and air molecules have the same speed in the same direction.
--- End quote ---

You get that the prop thrust is actually moving backwards from the vehicle, so presenting resistance to the wind which is at vehicle speed?

Ah, forgot, no you don't. In your universe the turning prop doesn't produce thrust of any kind in any direction.

electrodacus:

--- Quote from: dunkemhigh on July 12, 2022, 07:46:07 pm ---
You made a video showing it working. You say it's energy storage rather than friction that makes it jerk but, and this is what you are ignoring even though you actually made it happen, the vehicle moved to the right. At no point did it move left. It would keep moving right as long as you pulled the paper, jerking or not.

Your energy storage fetish is just covering up the fact that the model worked as predicted, as you proved.

--- End quote ---

I made the video exactly to show what happens for someone that can understand it.
It is clear both in video and in theory the front wheel (wheel on the right that is generator wheel) moves while the vehicle and back wheel are stationary meaning that energy from the front wheel is being stored.
You have a force and speed at the front wheel so you have power but the power input is not doing any work as it is being stored as elastic potential energy in the belt.
As the belt is stretched more and more storing energy the force at generator wheel with will be mirrored exactly at the motor wheel and at some point this force becomes so large that the wheel will slip allowing in that moment the back wheel to rotate forward powered by the energy stored in the belt and as that stored energy is being used up the acceleration slows down until the wheel sticks again and the cycle repeat.
A smaller energy storage capacity (stiffer belt) means the cycle will need to repeat much faster so fast that it will not be visible without a high speed camera (human brain will see that as continue motion same as 30 still photos in sequence per second look like smooth motion).
If wheel was not allowed to slip or reduce the slip to a level where power delivered by the energy storage can not cancel friction the vehicle will not move or move backwards so from right to left.

You just make the theoretical calculation of that simple system excluding energy storage and you see that vehicle has no chance to move forward unless of course like Naej you think more than 100% efficiency is possible.

electrodacus:

--- Quote from: dunkemhigh on July 12, 2022, 07:54:31 pm ---
You get that the prop thrust is actually moving backwards from the vehicle, so presenting resistance to the wind which is at vehicle speed?

Ah, forgot, no you don't. In your universe the turning prop doesn't produce thrust of any kind in any direction.

--- End quote ---

You forget that the prop is powered by wind power so if wind power is zero prop power is zero.
We are ignoring energy storage that you do not want to acknowledge as if you acknowledge the reality then vehicle is still pulled and push by the stored pressure differential. Witch is what happens in real world with propeller in air (compressible fluid).

To ignore energy storage in pressure differential is to ignore than air (gas) is a compressible fluid.
In a non compressible fluid like water the same vehicle can not exceed water speed unless again you think that efficiency of any system can be above 100% (Overunity).

Naej:

--- Quote from: electrodacus on July 12, 2022, 07:47:12 pm ---
--- Quote from: Naej on July 12, 2022, 07:38:38 pm ---Nah there's plenty of energy available in wind. You know, 1/2*m*v^2 is rarely equal to 0.

--- End quote ---

You get that the air molecules can no longer hit the vehicle when both the vehicle and air molecules have the same speed in the same direction.
Even your wrong wind power equation agrees with that statement.
But since you think over 100% efficiency is possible and think that you get more propulsion power than braking power at the wheels is hard to have a rational discussion.
Until you recognise that above 100% efficiency is not possible. I'm just wasting my time.

--- End quote ---
Do you think a propeller in still air can't work? Lol.
Okay let's wrongly assume there is a problem at this speed. Then when the car goes at twice the wind speed, there's plenty of air for the prop.

Ever heard about heat pumps? They can have 300% efficiency.
If you want to understand why, and how, then you'll have to learn about thermodynamics.

Naej:

--- Quote from: electrodacus on July 12, 2022, 08:09:03 pm ---
--- Quote from: dunkemhigh on July 12, 2022, 07:54:31 pm ---
You get that the prop thrust is actually moving backwards from the vehicle, so presenting resistance to the wind which is at vehicle speed?

Ah, forgot, no you don't. In your universe the turning prop doesn't produce thrust of any kind in any direction.

--- End quote ---
You forget that the prop is powered by wind power so if wind power is zero prop power is zero.

--- End quote ---
The prop is geared to the wheels. If the wheels turn, the prop turns.
And if the prop turns, the kinetic energy of the wind behind the car is reduced, which means you get energy to the car. Very simple.

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