Elementary Physics Revisited

[nilrehob]

Hi Hob,

Thanks for the paper, interesting read. I have not seen such conclusion as the amount of copper determines the force per power ratio, it includes more things than the length of the wire, this latter was known of course as the more turns (i.e the higher inductance), the more force.

Would like to read your opinion on the following winding method I think I read it from member wattsup long time ago.
It involves a multilayer coil, say when the first layer is finished, you do not continue the winding backwards to make the second layer but you bring back the wire straight to and above the start of the first layer and you make the second layer in the same winding direction as the first layer was wound. Then finishing the second layer, you bring back the wire straight again to and above the start of the second layer and make the third layer in the same winding direction as the second (and of course the first) layer was.  And so on and on with the rest of the layers if needed. No any other special requirement on the shape, sizes etc of the coil wound this way was mentioned.
Can you judge whether there would be any advantage in using such winding method? I have not tested this, just occured to me that you or your colleague may have some info on this, or just a gut feeling? 

Thanks,
Gyula

My gut feeling is that directional-winded coils does not matter if used as an electromagnet, but if you pulse it i'm sure it makes a difference. Im pretty confident the original equation F = ... Nˆ2 Iˆ2 A holds. I have just rearranged it trying to make real world sense to it.


/Hob

[gyulasun]

Hi Hob,

Okay, thanks for your answer.

Gyula

[nilrehob]

Minor changes to paper 1-4,
paper 5 had the experiment redone with more coils.

/Hob

[nilrehob]

There is a new version of paper 5 out with added sections.
Paper 1-4 have only minor changes.
You find them at:
https://sites.google.com/site/nilrehob/home/elementary-physics

If anyone would like to help with spelling, grammar, wording, content, whatever,
please go to github and contribute:
https://github.com/boherlin/elementary-physics

We have also made a bitcoin-account for donations.
But we're not sure its working, no donations yet..
If anyone could send a tiny-weeny satoshi we would be thrilled.
Account number at the end of the papers.

/Hob

[nilrehob]

Ouch, fixed a big error in ch 5, another version is out,
interesting how some errors only get caught after it gets public.

/Hob