Roll on the 20th June

[exxcomm0n]

@ Judas

Hi, and welcome to OU.

Thanks for the video link! It looks interesting, and not that far off what we're trying to do here.

Stay tuned as one of us might get lucky before June 20th, but if we're not, the Archer video/build details will be available then.

Question everything? Even you statement about questioning? (That's a joke )

Have fun, and I look forward to a topic from you about something you've thought about/built!

[infringer]

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Excomm
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Nice bud! your toy is cheap and crude the way it should be! Anyone can replicate this very cheaply...

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Judas
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Vvelcome to OU.com

I dont mean to rain on your parade but computer modeling is neat but is quite a bit out of scale it seems in most cases...

Your magnets are far too far apart to see the effect which you are displaying... While neat to show principal computer modeling seems to be pretty poor and out of spec.

Judas take care and dont be scared to post your thoughts unless you plan on trying to save ideas to become filthy rich or something.... And regaurdless of what I say please do post your computer models! because it does more justice to see the principal of something.


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@all
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Damn this thread has come a long way indeed hope to see more as time goes on hope to share something with you as well... In the form of visual.

[Judas]

Judas take care and dont be scared to post your thoughts unless you plan on trying to save ideas to become filthy rich or something.... And regaurdless of what I say please do post your computer models! because it does more justice to see the principal of something.

Sorry man, allthough I probably also would use pcmodelling this model isn't mine, I only came across it on youtube.
Filty rich...  well, that's not my plan

I'm now gonna shut up untill I come up with something interresting to say if you don't mind

Cheers

[redriderno22]

hello all,

sorry diddnt have any time today to play
wife made me work

Excommon, i posted a comment on your vid

your getting close

once you find the weight to break the wall, and i mean just barely

extend the arms and keep the weight the same

but make sure its not too much for the mags to handle

thats why i added one penny at a time!

when i start my rebuild im going to add another tube rod and make it solid

anyone have any suggestions for a new axle?

the hard drive motor i used was perfect, just not strong enough.

ClAnZeR or sean

how ?
umm yours looks good, very good
but?
where are your mags going to be?
and your weights need to be beyond the mags.

hope this helps

matt

[sm0ky2]

Archer (and all), does the wheel as a whole need to have a certain minimum mass to provide enough momentum for the rod magnets to "break the wall."  In other words, so that the wheel will keep turning enough, by inertia, for the rod magnet to be pushed into the fields of the upper and lower magnets so that the rod will lift.  If there is not enough mass (inertia) in the turning wheel, will the repulsion of the lower magnets simply stop the wheel?

What you must have is a proportionate balance between:

1) the strength of the magnets
2) the mass of the wheel
3) the (leveraged) mass of the imbalanced rod(s)


Such that the following occurs:

1) the imbalanced mass overcomes the 0 inertia state and turns the wheel.
2) the momentum of the wheel turning at the speed caused by (1) - can "break the magnetic wall"
3) the Strength of the repelling magnets (lower) must be strong enough to lift the weighted-rod AND be weak enough for its "wall" to be broken by (1) & (2).
4) the Strength of the attracting magnets (upper) must be strong enough to "hold" the rod against gravity, thus maintaining the imbalance - AND be weak enough to pull away at the end of the magnet-array and allow the wheel to keep turning .

I'm sorry, i cant come up with exact numbers without litterally performing the experiment with every possible combination of mass/gauss/diameter/ect..

the most logical thing i can come up with is to design the wheel around your magnets.
for example -
find the magnets you want to use, and see how much mass they can "lift" in repulsion at distance x

This is the max weight of your assembled rod - ideally you want the rod to weight a little less than this.
     so that the magnets can easily move/hold the rod into position.

then increase the mass of your wheel / extend the rod weights -  until the "wall is broken".

doing it this way, you have your only NON-Adjustable factor (the strength of the magnets) set to a constant,
and then you change your variables to meet the desired criteria stated above.

so to answer your question:  YES - the wheel mass plays a very important role with respect to the magnetic interactions. Too little, the "wall wont break".   Too Much and the counterweights wont move the wheel fast enough (unless you extend them further which increases the mass of the rods)

Stronger magnets will require a more massive wheel.