Working Magnetic Motor on you tube??

[Bruce_TPU]

@Bruce-TPU,

Do I understand it correctly, just the HDPE part (without the magnets and the bearings) of your rotor which is 3/8" short of Jason's blue print weighs 258g, right? 

@ Omni

My current, incorrectly sized rotor, with magnets and two bearing weighs 258 grams.  I have a very accurate digital scale.

So....the correctly sized rotor will be of the incorrect weight.

@ Bill

Please PM me, if you can assist in making my rotor the correct weight at a future date.  Thanks!

Bill the tool man!   

Cheers,

Bruce

EDIT:
But the question remains;  Why is the weight of our rotors off by so much, using same material, etc?  What or where is the problem?

Indeed, why is the weight of our rotors off by so much? That is one of the central questions that have to be addressed when talking to @alsetalokin.

Also, wouldn't your incorrect rotor, now being of the correct weight of 258g, be away from the stator not at exactly 5mm which @alsetalokin emphasized to be a crucial parameter (not 4mm, not 6mm, but exactly 5mm)?

We must settle this issue with the rotor weight once and for all as well as the magnetic induction profile around rotor and stators, before we can ever expect to observe the effect in the video, I think.

It seems that we're faced with fewer parameters to play with and adjust compared to other instances, say, compared to making a working Wankel engine, correct? Of all the proposed magnetic motor this one and @xpenzif's seem to be the easiest (having fewer parameters) to  optimize. That's why it seems so attractive.

Hi Omni,

The fact that the stator is so far from the rotor is how I figured out that the rotor was not cut to specs!  This is why I have had NO test results.  Not until I have the proper sized rotor.  But...It will be the wrong weight.  Why?  A.)  Wrong material  B.)  Wrong dimension  C.)  Al's scale is off  D.) He weighed without the magnets or bearing.  *This would get us closer, if that is the case.

Cheers,

Bruce

[Omnibus]

@ken_nyus,

The thickness of my rotor is slightly over 20mm (measured with a micrometer). Jason?s drawings require ?? thickness, that is 0.75 x 25.4 = 19.05mm.

The diameter of my rotor is approx. 147mm (measured with a ruler). Jason?s drawings require 2 x 2.875?, that is 5.75 x 25.4 = 146.05mm.

I wonder if these slight discrepancies would lead to the 45g difference between my 303g rotor (HDPE + magnets + two bearings) and the required 258g rotor of the original. Don?t know what the density of HDPE is.

I?m stuck with it for now (don?t know what the weight of the other rig I don?t have with me at this moment). These discrepancies do not affect the measurements of the magnetic induction profile of rotor and stator, though. I've already measured it for my N42 and have posted it here. Probably tomorrow I'll do it for my N38 and N35 magnets. Will try them also assembled to see if they'd make any difference.

[Omnibus]

@Bruce-TPU,

Do I understand it correctly, just the HDPE part (without the magnets and the bearings) of your rotor which is 3/8" short of Jason's blue print weighs 258g, right? 

@ Omni

My current, incorrectly sized rotor, with magnets and two bearing weighs 258 grams.  I have a very accurate digital scale.

So....the correctly sized rotor will be of the incorrect weight.

@ Bill

Please PM me, if you can assist in making my rotor the correct weight at a future date.  Thanks!

Bill the tool man!   

Cheers,

Bruce

EDIT:
But the question remains;  Why is the weight of our rotors off by so much, using same material, etc?  What or where is the problem?

Indeed, why is the weight of our rotors off by so much? That is one of the central questions that have to be addressed when talking to @alsetalokin.

Also, wouldn't your incorrect rotor, now being of the correct weight of 258g, be away from the stator not at exactly 5mm which @alsetalokin emphasized to be a crucial parameter (not 4mm, not 6mm, but exactly 5mm)?

We must settle this issue with the rotor weight once and for all as well as the magnetic induction profile around rotor and stators, before we can ever expect to observe the effect in the video, I think.

It seems that we're faced with fewer parameters to play with and adjust compared to other instances, say, compared to making a working Wankel engine, correct? Of all the proposed magnetic motor this one and @xpenzif's seem to be the easiest (having fewer parameters) to  optimize. That's why it seems so attractive.

Hi Omni,

The fact that the stator is so far from the rotor is how I figured out that the rotor was not cut to specs!  This is why I have had NO test results.  Not until I have the proper sized rotor.  But...It will be the wrong weight.  Why?  A.)  Wrong material  B.)  Wrong dimension  C.)  Al's scale is off  D.) He weighed without the magnets or bearing.  *This would get us closer, if that is the case.

Cheers,

Bruce

We've got to clarify this problem with @alsetalokin. I'll do what I can with what I have throughout the weekend but we do need more input from the original constructor.

[Omnibus]

I wish more details were known about the Lego motor: http://youtube.com/watch?v=wcy0tedYBMg which is the best example so far for the application of the principle at hand, especially its self-starting, aside from the acceleration seen in the video. We have to work with what we have, however, and should only hope that the Mike story (wetting everybody's appetite followed by a sudden disappearance) from that unfortunate Bedini window motor thread won't repeat itself.

[vipond50]

@ken_nyus,

The thickness of my rotor is slightly over 20mm (measured with a micrometer). Jason?s drawings require ?? thickness, that is 0.75 x 25.4 = 19.05mm.

The diameter of my rotor is approx. 147mm (measured with a ruler). Jason?s drawings require 2 x 2.875?, that is 5.75 x 25.4 = 146.05mm.

I wonder if these slight discrepancies would lead to the 45g difference between my 303g rotor (HDPE + magnets + two bearings) and the required 258g rotor of the original. Don?t know what the density of HDPE is.

I?m stuck with it for now (don?t know what the weight of the other rig I don?t have with me at this moment). These discrepancies do not affect the measurements of the magnetic induction profile of rotor and stator, though. I've already measured it for my N42 and have posted it here. Probably tomorrow I'll do it for my N38 and N35 magnets. Will try them also assembled to see if they'd make any difference.

Hello
One thing that would be nice to know is what spec of HDPE was your rotors made out of ?

More than likely it is ASTM D4976, but if one wanted to know for sure call the shops and ask for the ASTM spec. and or have them track it down.
There are several possiblities