Utron research

[sm0ky2]

Each "step" should have more turns as you get smaller
There's an exact number, I don't have that info available
at the moment. But Tesla and Carr both write about it.


But hopefully this will give you a starting point for your tests.
The "square geometry" is important
'Slopes' don't work very well

[Cherryman]

Thanks smOkey,


I will keep that in mind and maybe try as well.
Is there a reason stepped coils work better as sloped ones? 

[Cherryman]

Small update.
I improved my setup , added some bearings and i made a better motor setup.
Needs some more finetuning.



https://youtu.be/orNHhZZnTRY

[Cherryman]

Some observation i made during all these tests:


Every time i speed up the rpm, the Utron wants to go up..


I know.. i know.. it's probably friction and resonance, vibration, dis-balance.. working the thing up...     But still...   


Had some problems with the alignment of all 4 bearings in line, I made them adjustable 2D , but tightening and the deviation of the wood makes also some 3D problems.,
I hate permanent bondings, due to i like fast switching of concepts and setups..   but after my bearing kept flying up ... i super glued them in place now. A sad day.
I put some superglue on the sides now..  Had some problems with the alignment of all 4 bearings, not easy!

[sm0ky2]

Thanks smOkey,


I will keep that in mind and maybe try as well.
Is there a reason stepped coils work better as sloped ones?

The way Tesla discribed it, which was also echoed by Mr Carr,
Is that the induction of the larger loops is greater than in the
smaller loops, and adding more loops in the smaller dimension
balances this out to minimize losses in the step down.
Thus keeping the induction coefficient the same all the way down
the coil. This causes an increase in field strength ( density).


Having a sloped conical coil causes the change in induction to
exceed the change in field condensation, which weakens the field
in each progressively smaller loop.


I don't have the equations readily available,
But let's assume that 1/2 coil diameter requires
twice as many # of turns. By this analysis, you can see a
proportionality between the two, as inductance is equal.
(Like I said I don't have the equations, so it may not be
as straightforward as this example).