The Rubber Band Motor

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Grimer
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Post by Grimer »

LOL.

Economical indeed - especially because the white nylon ties have a release mechanism and are reusable. My daughter wanted me to dump the chairs since they are in various stages of decrepitude (the right hand one broke its back as has been mended which is why it is shorter than the left).

I see you've been dredging through my Photobucket. You'll have plenty to look at . I don't think any of them are pornographic.

I thought I had deleted the post from this thread when I copied it to the Aknowledgement thread on the Community Buzz Forum. My deletion must have failed.
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re: The Rubber Band Motor

Post by Ed »

I remembered you had some old Keelynet stuff on your site, so I wondered what was might be in your Photobucket. Don't worry, I only looked at the first couple of pages, so your images from the bordello are safe! ;-)

By the way, what's with the gallows?
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Post by Grimer »

Ed wrote:I remembered you had some old Keelynet stuff on your site, so I wondered what was might be in your Photobucket. Don't worry, I only looked at the first couple of pages, so your images from the bordello are safe! ;-)

By the way, what's with the gallows?
http://www.besslerwheel.com/forum/viewt ... 529#109529
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re: The Rubber Band Motor

Post by Furcurequs »

Here's a nice variation on the rubber band motor. This one uses strips cut from a plastic trash bag and runs at about 60 rpm.

"Solar motor--Free energy motor-- not electrical /// Homemade Science with Bruce Yeany"

https://www.youtube.com/watch?v=VQqpnAK ... e=youtu.be
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Post by Grimer »

I love it. Thanks for that.

https://www.youtube.com/watch?v=U3as8dhaV-w

Notice the neat magnetic bearings on this one which uses solar cells.
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re: The Rubber Band Motor

Post by Furcurequs »

You're welcome.

I was already planning on watching the one that you posted. I finally did, and it's a nice looking build. It would look nice sitting next to my Crooke's radiometer / light mill.
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Re: re: The Rubber Band Motor

Post by Furcurequs »

Furcurequs wrote:Here's a nice variation on the rubber band motor. This one uses strips cut from a plastic trash bag and runs at about 60 rpm.

"Solar motor--Free energy motor-- not electrical /// Homemade Science with Bruce Yeany"

https://www.youtube.com/watch?v=VQqpnAK ... e=youtu.be
I ended up watching over a hundred of this guy's videos. He's apparently a middle school science teacher, and he builds all sorts of demonstration devices to show his students. He's made lots of neat toys.

Apparently, he's also one of those punkin chunkin' trebuchet people, and in one of his videos it shows his trebuchet right next to the "Smokin' Lamas" that I analyzed when addressing some of pequaide's stuff. This guy's trebuchet may even be in the background of the gifs I made.

Anyway, I like watching physics demonstrations. It helps me to have a feel for things beyond just doing the math.
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Re: re: The Rubber Band Motor

Post by nicbordeaux »

Mark wrote:
Grimer wrote:I assume that you agree angular momentum has to be conserved.

Pardon my unsolicited two pennies worth of opinion, Frank, but actually, no!

I'm currently working toward a solution (well, I can hope, eh?) which is based on the fact that conservation of angular momentum can be suspended, even if only temporarily.


Wouldn't care to comment on the temprary suspension of angular momentum, but you can definitely transfer it, or move it around between different components of a system.
If you think you have an overunity device, think again, there is no such thing. You might just possibly have an unexpectedly efficient device. In which case you will be abducted by MIB and threatened by aliens.
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re: The Rubber Band Motor

Post by Grimer »

I agree with that, nic and Mark

Since angular momentum is 3rd derivative energy it can be transduced into any other form of energy given the right mechanism. The conservation of angular moment only applies within its own order.

Thanks for pointing that out. The conservation of energy applies to the total energy of a closed system and no physical systems are closed - only theoretical systems.

Ultimately it all comes down to the conservation of volume and even then it's a matter of simplicity since if all measurement stay the same relative to all other measurements change is undetectable.
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re: The Rubber Band Motor

Post by Tarsier79 »

OMG. Let us just pretend for a second Energy is conservative... If that is the case, then any derivative of energy doesn't have to be conservative. The third derivative isn't conservative, neither is the second, or the first.

I'm pretty sure you don't even know what a derivative is.
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Post by Grimer »

I love you too. ;-)

" According to the second law of motion net force acting on a body is equal to its rate of change of linear momentum. Thus the angular momentum of a particle is conserved if and only if the net external torque acting on a particle is zero.*

So angular momentum is conserved except where it isn't.
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re: The Rubber Band Motor

Post by Tarsier79 »

You can have the same energy with different angular momentums.

Please explain in you own words concisely what you beleive "third derivative energy " is. You will have to explain each derivative, and explain what relevance each step relates to energy, and why you beleive the third step to be particularly relevant.
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re: The Rubber Band Motor

Post by Grimer »

Let's sort out this question of the conservation of angular momentum.

Let's start with Boyle's Law, PV = a constant
The "the product of absolute pressure and volume is always constant."

So is PV conserved?

Yes - provided that other variables which affect PV such as compreture (inverse temperature), for example, are kept constant.

So PV is conserved - and it isn't conserved.

Likewise with angular momentum.
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Re: re: The Rubber Band Motor

Post by Grimer »

Tarsier79 wrote:... why you believe the third step to be particularly relevant.
The third step is particularly relevant for the same reason that the third step in the Carnot cycle is particularly relevant.

Without bringing in the compreture variable you cannot get an energy cycle to convert heat potential to mechanical motion.

Without bringing in the jerk variable you cannot get energy from NG potential.
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re: The Rubber Band Motor

Post by Tarsier79 »

You didnt answer the question. Practicing to be a politician?
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