Printable View
I am offering $5000 to have this made
https://www.youtube.com/watch?v=ZX34d7zC9SQ&feature=youtu.be
it is a renewable energy device using a spring on a motor
here is how it is made
http://www.yankodesign.com/2011/02/01/s … tor-energy
It is a maxon geared motor on a spring
are there any takers
I think this is your answer:
I do, however, have a design for a perpetual motion machine I can sell you :-)Quote:
This makes it seem trivial to generate power. Lets take the claims at face value.
A phone charging off a USB port will pull 500mA max at 5V – that is 2.5 watts, completely reasonable for a battery that needs to be charged. 2.5 watts for the claimed 30 minutes is 1.25 watt hours. 1.25 watt hours is 4500 Joules.
This is an ENORMOUS amount of energy to store in a small spring. Energy stored in a coil spring is .5*k*x*x – a very stiff spring would have a K value of 90lbs/in (takes 90 pounds force to compress/extend by 1 inch)***.
You would have to compress or extend said spring about 29 inches to get this amount of potential energy…. 29in*90lb/in = 2610lb
It’s fairly unreasonable to expect a human to apply over 2 short tons of push/pull – even 90 pounds is unreasonable.
Now, I know it’s a twisting action – power springs are more abstract to the layman than the ubiquitous coil spring.
Even if we used a power spring (the style used in clocks, seat belts, wind up toys, etc.) – it would need to be gigantic and would be equally difficult to “compress” VIA twisting.
Designers – please stop trivializing power generation! It makes my job (and the jobs of others working in the space of small scale energy conversion) more difficult and fails to manage customer expectation. The internet has a huge amount of resources to do quick feasibility gut checks.
—
*** I did the calculation using more traditional units using newtons, meters, etc. pounds (force) and inches are just for reader ease.
Read more at http://www.yankodesign.com/2011/02/0...Y1G18sdIR3F.99
It's a wind up torch. Head to Amazon and save your money.
Hmmmmm..... Can there be a more grainy video? Are we making Bigfoot here?
I betcha though..... when we do catch bigfoot, we're going to discover he's just naturally out of focus, like all warbly and stuff, shifting onto another plane perhaps, and all those photos of it him are actually crystal clear.
Wouldn't it just be more efficient to use a detachable battery with a cranked generator?
Pretty sure it's some kind of weird scam.
And I'm sure there are already wind up phone chargers around.