General > General Technical Chat

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

<< < (248/285) > >>

gnuarm:

--- Quote from: electrodacus on December 28, 2021, 12:47:23 am ---
--- Quote from: gnuarm on December 28, 2021, 12:40:05 am ---This guy reminds me of Andrea Rossi, the cold fusion guy who claims to have a device that will generate more heat than the amount of energy added electrically.  He is never direct with anyone, only giving out the information he wants to give out and never letting anyone actually have access to the device. 

ED never answers a question directly, only answering the parts he wants and trying to steer the discussion away from the points he can't successfully discuss. 

I guess there really is no point in trying to reason with someone who doesn't properly understand that energy is a simple scalar quantity like distance and power is a rate wrt time like speed.

--- End quote ---

This is the sort of claims you make (overunity) is just that you do not realize you are doing this. The use of energy storage brakes no laws and is how blackbird works.
Why none of you answered the swimming in a river question ? Is that because none of you had the chance to swim in a river ? Or is it that you think swimming in a river against the current is different than a vehicle driving with a headwind ?

--- End quote ---

The river example is irrelevant and hard to create an analogy to the issue at hand.  You have not responded to my previous post where I asked you to acknowledge the equations for the force from the wind and the resulting power required to maintain a vehicle speed against the wind.

gnuarm:

--- Quote from: electrodacus on December 28, 2021, 12:55:01 am ---
--- Quote from: IanB on December 28, 2021, 12:52:10 am ---Oh, no, we don't think that. We know that swimming in a river against the current is different than a vehicle driving with a headwind.

The question is, do you?

--- End quote ---

It is not different.  Are you saying air is not a fluid same as water ?

--- End quote ---

Swimming in a river is like an airplane in the air, not a car into the wind.

IanB:

--- Quote from: electrodacus on December 28, 2021, 12:51:02 am ---I saw a better example but here is one. Notice the non constant vehicle movement ?
--- End quote ---

No. Every frame, the vehicle moves forward by the same amount.

electrodacus:

--- Quote from: gnuarm on December 28, 2021, 12:52:50 am ---Yes, of course.  He is never going to understand the physics because he is too invested in his position.  There is literally nothing anyone can do to show him he doesn't understand the problem.  Actually, that might not be true.  It is very possible that he knows he is wrong, but wants to save face. 

I know I've been in that position a few times and had to admit I was wrong.  Heck, I think I started out saying (or at least thinking) the downwind vehicle could not exceed the wind speed until I realized the distinction between the wheels on the pavement only at the vehicle speed and the force on the propeller was from the power generated by the wheels (vehicle speed) AND the wind speed together. 

Then I had to rethink again on the vehicle going into the wind.  It was when I saw the blades nearly feathered that I realized again, it is a matter of gearing/prop pitch to get the right forces. 

I had to change my argument in both cases when I saw the light.  This guy wants to deny the light and live in the dark.

It is pretty impressive that he can generate these elaborate constructions to obfuscate the real physics.  Yes, very creative.

--- End quote ---

I'm more than happy to admit when I'm wrong. It is just not the case this time.
Have you seen the two videos of a direct upwind toy I just posted. Can you see fairly clearly energy storage charge and discharge ?

electrodacus:

--- Quote from: gnuarm on December 28, 2021, 12:56:12 am ---
Swimming in a river is like an airplane in the air, not a car into the wind.

--- End quote ---

A vehicle on wheels with no friction (ideal wheels) is not different from an airplane. At least not in the discussion we have here.
But if you are more happy the guy in the river can be on wheels (maybe some of those wheel skates) and then try to move against current

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod