Selfrunning Free Energy devices up to 5 KW from Tariel Kapanadze

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I also think that TK has access to different OU builds

Exactly. I am not convinced he has made any inventions by himself. Looks like he always took the ideas from somewhere and tried to replicate and the result we can see in videos. I don't know what TK claims while doing the demos but if he presents the devices as his own inventions that would explain why he wants to hide the details and he probably does not even have deep understanding of how and why certain things work.
According to some sources for example his disc generator is based on Jakob Bitsadze invention? See the pdf there http://www.fqxi.org/community/forum/topic/1277

in comments:

"I did not carry out experiments. I work on underpaid work and I do not have superfluous financial assets. But in 2001 Tariel Kapanadze has appropriated one of variants of my mechanical generator and has lead successful experiment.

But experiment of Chas Chambell is more known. You can look them on a you-tube if you will type in search: Mechanical Generator Kapanadze or the generator of Chas Chambell"

[Hoppy]

Exactly. I am not convinced he has made any inventions by himself. Looks like he always took the ideas from somewhere and tried to replicate and the result we can see in videos. I don't know what TK claims while doing the demos but if he presents the devices as his own inventions that would explain why he wants to hide the details and he probably does not even have deep understanding of how and why certain things work.
According to some sources for example his disc generator is based on Jakob Bitsadze invention? See the pdf there http://www.fqxi.org/community/forum/topic/1277

in comments:

"I did not carry out experiments. I work on underpaid work and I do not have superfluous financial assets. But in 2001 Tariel Kapanadze has appropriated one of variants of my mechanical generator and has lead successful experiment.

But experiment of Chas Chambell is more known. You can look them on a you-tube if you will type in search: Mechanical Generator Kapanadze or the generator of Chas Chambell"

Chas Chambell uses a mains input to power the drive motor. Are you suggesting that this is the operating principle of the TK aqua motor? If so, given that there is no visible source of input energy to the aqua motor, do you think TK has a set of hidden batteries to power the small motor which turns the two discs via the pulley belt?

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I followed up the remarks made by Сергей В. Last night regarding the experiments conducted by JLN Labs. Just have a quick visit and scroll down from the input watt meter, noting it's input reading. Scroll down to the output analysis. Am I right in what I see? Nearly  600W gain??

It is not a gain because both measurements pertain to the Input power.
If one measurement was about input and the other about output then it would be a gain.

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So IMO we have..... PP3 hits relay..... 12 V battery hits single phase invertor...... Single phase inverter hits 3 phase inverter..... Hits Toroidal "Stator".......Drives shaft......Output from alternator then keeps up charge for 12 V........ Appears to be a self runner.

I doubt that the Torroidal "Stator" can drive the shaft because:
- The toroid is not braced sufficiently inside the plastic holder as not to "recoil" from any significant torque.
- small radius of the rotor (shaft) means small torque
- two wires supplying the toroidal windings are insufficient for 3-phase winding to create a rotating magnetic field.
- the geometry of the toroidal windings is wrong for creating a rotating magnetic field.

...and a weak argument that magnetizing the shaft or embedding permanent magnets in it is not visible and hard to do.

Have a closer look at http://www.youtube.com/watch?v=vZC5CwCTv4I&feature=youtu.be&t=0m01s Early on in the video my 2 younger sons spotted the copper straps over the "Plummer blocks".

The delivery of strong current to the outer races of the ball-bearings does not require copper straps. The bolts holding the plummer/pillow blocks are quite sufficient for this purpose.

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I should have said that any batteries could easily be stored in the base of the aqua as there is probably a space covering the full area of the base with a depth represented by the depth of the metal channel section forming the structural base of the aqua.

Yes, there is sufficient space there to conceal batteries. Also the bottom of these channels is plated over with sheet metal, which adds credence to concealment theory in that space (why do the extra work & cost to plate them over, otherwise ?).
Then, there is a round hole in one of these channels visible and in one of the video clips there is a man staring inside it. See here.

The box section below the bearing housing would just house the power & trigger coils.

It could house them but because the box is aluminum it would shield the changing magnetic field generated in those boxes by 40% (assuming 50Hz and 3mm thick walls) or 57% (assuming 50Hz and 5mm thick walls). I marked those walls in yellow on your diagram.

The air gap between rotor and coil is quite small compared to the big motor device and this may account for the faster acceleration of the rotor in the aqua video.

What's the size of that air gap in your opinion ?

Also note that the aquarium device has a small automotive alternator attached to it , while the open-frame device has a big generator attached.  Wouldn't that difference account for the difference in acceleration?

Notice at around 04:03 how freely the shaft turns just after the toroid coil is fitted in its housing. The small genny is still belt connected to the motor at this point!

Yes. there appears to be very little friction. However unloaded alternators turn very freely. The belt drive alone would present more mechanical resistance than the alternator.

I'm also wondering whether the rotor magnets are possibly electro-magnets given the wire coil on the axle with each end disappearing into a disc??

That would not make sense since the magnetic field close to the axis could not produce a torque on it. To maximize torque of the Bedini type motor, the magnetic poles have to be as close to the rims of the disks as possible, e.g. poles created by embedded permanent magnets near the perimeter of the disks, just like you had drawn.

PS: There is a wire coming out  the end of the shaft that the toroid fits over.

Yes, from both ends of the shaft-coil, I reckon
I have no proof, but I think that a HF signal applied to the toroid is eventually applied to this shaft-coil.

On further close examination of toroid, I can see no evidence of a slip ring arrangement.

Neither can I.

However, could the toroid be inducing a current into a coil within the shaft, assuming it is a hollow tube and not steel but say aluminium?

Yes, through some kind of rotary-transformer mechanism.
I strongly suspect that a different set if orthogonal windings is concealed under the ordinary toroidal winding.
The magnetic influence of an ordinary toroidal winding is almost  completely confined inside the core (If there is one. Bar the AB Effect).