1939 Gravity Power - multiply power by 1200%

[noonespecial]

noonespecial: long time no see, hows the spring device coming along, I sometimes have my doubts, we may have over-reacted and assumed things that were not true.

No overunity by traditional standards but there is greater output than to be expected. Given the common efficiency of both the motor and alternator the best systemic efficiency should be in the neighborhood of 40% but I'm close to 80% which is unusual. There are quite a few variable to go through so its taking a while.


Charlie

[Spirit]

Those videos are essentially the same as the John Device.

No i think it's more like skinner's principle

[Spirit]

This is what i plan to build using about 100 pounds for the weight.
Any suggestions on what alternator to use?
What small motor to use?
What battery or batteries to use?
What inverter to use?
Also i don't want my battery to overcharge..i think the alternator has something that controls this?

I'm on a budget so i can't be spending too much..

[TinselKoala]

No overunity by traditional standards but there is greater output than to be expected. Given the common efficiency of both the motor and alternator the best systemic efficiency should be in the neighborhood of 40% but I'm close to 80% which is unusual. There are quite a few variable to go through so its taking a while.


Charlie

Do you have specific efficiency figures for the alternator and motor that you are actually using? Because even a short internet search tells me that alternators of 80-85 percent "common" efficiency are not unusual, and motors of 95 percent efficiency are in common use.  So your finding, if it is correct, of being "close to 80 percent" is neither unusual nor particularly special. 0.85 x 0.95 = 0.80 or slightly over, and even if you use not particulary efficient items, .80 x .90 = 0.72, probably within your margin of error for "close to 80 percent."

And if image posters would size their images to be no more than 1024 pixels wide... it would make the images themselves easier to see, and it would not disrupt the page formatting the way outrageously large images do.

[Madeo]

This is what i plan to build using about 100 pounds for the weight.
Any suggestions on what alternator to use?
What small motor to use?
What battery or batteries to use?
What inverter to use?
Also i don't want my battery to overcharge..i think the alternator has something that controls this?

I'm on a budget so i can't be spending too much..

im planning on building this one myself when i get the chance. I would suggest that you stay within the 12v-18v system because you can use lead acid batteries and have a charge controller to automatically maintain a safe charge on the batteries. Charge controllers are cheap on Ebay (the simple ones anyway). I am not certain on the cost of the motors, but i don't see why you can't find cheap ones that are rated at those voltages. If you are thinking of using car alternators as your motor/generator,  I'd highly advise you not to use that.  Those alternators do not have permanent magnets inside. You'd be forced to modify it by tearing it apart and installing magnets yourself which I heard can be a pain in the ass.


Btw, charge controllers are for solar panel setups. For as long as you make sure your output current is DC and filter it with a big capacitor,  it will work just fine.  You can build your own charge controller, but unless you are good at putting electronics stuff together,  i think it's a lot easier just to buy them. The only reason I would build my own is if i'm using voltages outside the 12-18v range.