Energy from the Ground - Self powered generator by Barbosa and Leal

[MileHigh]

I also have to differ with you as regards Bedini motors. My successful Bedini Cole window motor ran continuously on the same single battery for 3 months. The battery in question was a nearly " Knackered " Yuasa 12 V 7 ah Gel cell. It never lost a millivolt, stayed at 8.6 V continuous!! For me though, it did not serve any useful purpose other than to rotate. There was no free lunch !!

It all depends on how far you want to take it Grum.  It looks to me like you did not make a precise measurement of the average power consumption of the motor.  There are resources out there that will tell you how to do that.

One can assume that nothing remarkable took place.  An old battery can run a motor a very long time as long as the average power consumption is very low.  As TK stated, you did more of a "demonstration" as opposed to an "experiment."

If you had measured the average power consumption you would have been in a position to make a good estimate of how much energy the motor consumed over the course of three months, and then compared that with the ampere-hour rating of the battery.  Also, if you know batteries, factoring in the output impedance, the lower the load on the battery, the more energy you can extract from the battery.  So using the simplistic stated ampere-hour rating on the spec sheet would be not enough.  If there are "deeper specs" for the battery they may tell you the ampere-hour rating vs. load.

MileHigh

[Grumage]

@Grum:

You may find this page of interest:

http://lygte-info.dk/info/Internal%20impedance%20UK.html

Also, as you must surely know, the open-circuit or lightly loaded terminal voltage of a battery is _not_ a good indicator of the state of charge of the battery. It's too bad you didn't perform a real load-test of your Bedini battery, before and after running the motor (A True Experiment, instead of just a demonstration.)

@  TinselKoala.

Fully aware, thank you.

Grumage.

[MileHigh]

I already provided the figures for my particular experiment. At 20 vdc we had a current of 0.07 A, which by ohms law gives a value of 285.7 ohms.

I think you are mixing apples and oranges here.  That indeed was the measurement of the resistance between your two grounding rods.  We are discussing issues pertaining to the output impedance of a given battery.

[ramset]

Nap Time......

[Grumage]

Oh Dear Lord.

I give up. I shall leave you in peace.

Good luck everyone.