Working Magnetic Motor on you tube??

[Yadaraf]

@ Vipond

Thanks for clearing up the rotor issue.  Believe it or not I've been following this saga since December, but it's easy to lose track unless you are building the thing.

... Q:  Did I confuse the issue by posting pics of your rotor, and should I remove them?

Cheers, 

Yada..
.

Hi Yada
Enjoy your work relating to the acoustics, believe there is some excellent info hidden in the data.
As far as the Pic's, it would be up to the rest of the crew as to weather it would be confusing. I recommend to identify (easily) so the two devices are keep separated for clearity.
Just my thoughts

Please keep up the excellent work
Regards
Bill

Vipond50,

Glad you liked the acoustic analysis.  I agree that Al's audio provides some very objective data.  If nothing else, from it we have learned the importance of microphone placement, AGC, silence, etc. for creating a soundtrack that will be analyzed later.   

Concerning my previous post and the pics, I placed a disclaimer at the bottom of the posts along with a reference to your recent post for an explanation.

Cheers, 

Yada..
.

[AndreaGanora]

@AndreaGanora, that is an intrigueing and complex theory, however a few pages back, I think we determined that Al's balls are ceramic. 

< pictures a bearing within a bearing with ceramic races and magnetized balls running itself > [ someone wanna do the math on that one ? ] 

@JFK
Apart from jokes and from my "Magnetized Bearing?s magnetic vortex and delayed tailing effect"   wild teory  , I've based my two actual replication's rigs  mainly on the infos collected in a pdf file downloadable from OSPMMdotORG where are included lods of infos posted mainly by Al plus some others on various wipmag treads over at steorn and elsewhere.

There you can read Al's stator's bearings description  :
Stator bearings -
I had 8, they are Stewart-Warner, and I had to buy 5 more from another source, they are
unmarked.
Bearing is generic ball bearing, ferromagnetic, 0.500 x 0.1875 x 0.125
(Editor's note: If you look at the photos it is obvious the bearing is
0.500OD x 0.125ID x 0.1875H )
Mass of stator magnet assembly, including holder, magnet, and bearing:
10 grams. Variation between the 13 units is below the resolution of my (home) scale. 
 
@ All
here is the updated Pdf file,  it can be a great  help to go trough the various setup changes Al's operated  on his rig :

http://www.ospmm.org/whipmag/pdf/OC_motor_012708.pdf

Cheers and good luck everybody

[Bruce_TPU]

@AndreaGanora, that is an intrigueing and complex theory, however a few pages back, I think we determined that Al's balls are ceramic. 

< pictures a bearing within a bearing with ceramic races and magnetized balls running itself > [ someone wanna do the math on that one ? ] 

@JFK
Apart from jokes and from my "Magnetized Bearing?s magnetic vortex and delayed tailing effect"   wild teory  , I've based my two actual replication's rigs  mainly on the infos collected in a pdf file downloadable from OSPMMdotORG where are included lods of infos posted mainly by Al plus some others on various wipmag treads over at steorn and elsewhere.

There you can read Al's stator's bearings description  :
Stator bearings -
I had 8, they are Stewart-Warner, and I had to buy 5 more from another source, they are
unmarked.
Bearing is generic ball bearing, ferromagnetic, 0.500 x 0.1875 x 0.125
(Editor's note: If you look at the photos it is obvious the bearing is
0.500OD x 0.125ID x 0.1875H )
Mass of stator magnet assembly, including holder, magnet, and bearing:
10 grams. Variation between the 13 units is below the resolution of my (home) scale. 
 
@ All
here is the updated Pdf file,  it can be a great  help to go trough the various setup changes Al's operated  on his rig :

http://www.ospmm.org/whipmag/pdf/OC_motor_012708.pdf

Cheers and good luck everybody

Hello Andrea,

That bearing information is VERY useful.  I am meeting with the bearing guy tomorrow.  I will try to track those down.

EDIT:
I wish we had the height from the top of the base to the top of the rotor.

Cheers,

Bruce

[vipond50]

@vipond50,

So, the rotor weight 258g we are aiming at includes the HDPE part, the magnets and the piece that holds the shaft. These 258g, however, do not include the weight of the shaft and the weight of that red piece we see in the video on top of the rotor. Seems the actual weight of the rotor in the video is greater than 258g. Exactly how much greater is a mystery.

At this point I'm more concerned about the exact weights, especially of the rotor, and about the kgauss of the fields acting. The bearing issue seems a somewhat side issue--the over 200s rundown time being easily achievable with the bearings in the rotor and the AGW not difficult to lock especially when applying penetrating lubricant.

Hi Omni
Well the true Mass of the Rotor in the Second version really is not known, but Al did state that he plugged the hole. I take this to mean that he machined an adapter to fit the New shaft arrangement. So if this is the case then the total Mass of the Rotor would be larger than the 258 grams.
Which U have stated as Rotor+Magnets+Bearings(?). The physical mass of the shaft would not effect the actual mass of the Second version rotor due to its really part of the Base plate. The rotational resistance although would as u are aware. The Red piece (Pulley) is an unknown in mass.
Now.... The mass of the HDPE Plug, I would think would be very close to the mass of the bearings utilized in Ver. 1 (educated Guess). Don't forget that Al machined out the under side of the Ver. 2 Rotor to afford clearances for the Bearing tower and mounting Cap screws. The mass of that material could bring the total mass of the Rotor back down to the 258 gram mark. ((Guessing here also) Dam, I hate this guessing), but all one can due is approximate from the pictorial details supplied in the Second Video.
I am in agreement with U relating to the magnetic work, but really we will not know for sure until Al does these mea's himself. I am not holding my breath on this one, so I am trudging along using the best estimated method. Very Frustrating and time consuming, but necessary.

AGW lock really is a given at this point, but the first phase aspect of the motorization is not. This is where I am working. To give some kind of indication which I have yet to observe with the second version. I believe after this aspect is reached then AWG will take the device to the second phase (spin up).

Regards
Bill

[Omnibus]

@Bruce_TPU,

"EDIT:
I wish we had the height from the top of the base to the top of the rotor."

Doesn't this dimension follow from the requirement that the bottom of the rotor magnets has to be flush with the top plane of the stator magnet?