Working Magnetic Motor on you tube??

[Grimer]

delete double post

[Yadaraf]

@meggerman   
This is the first post that I have made to this and any other form so dare say that I will screw it up some how. 
As I have followed the threads there is one glaring observation that I have not yet seen even after having read all the miles of script and dialog posted. It is rather obvious that the bearings are a real bugaboo. This application of ball bearings is pure torture to them plain and simple. Ball bearings are designed for rotary motion not oscillation, especially at the speeds required in this application. So?? what ever happened to the old low tech device, the bronze oil impregnated bearing? In the electrical industry they are the product of choice in large horsepower motors. Just ask an engineer to put a bearing with balls into a 4000 HP electric motor. I?d like to see the look on the face of the engineer who designs these large horse power motors when he hears that one. There is an amazing durability and reliability to these bearing IF they are kept oiled properly. I do understand that ?replication? is the goal but with all the variations to the basic theme why this one has not been explored is beyond me.

Cheers

j7   

J7,

That's an excellent observation IMHO.  I'm familiar with bearing noise from having worked on submarines, where noise is a big issue (i.e. "run silent run deep").  I previously suggested that the bearing in Al's rotor had a characteristic frequency of 160 Hz at 425 RPM, but I no longer see that to be the case, and so I'm reanalyzing the soundtrack now.  I'm surprised everyone let me get away with that observation.  Where are the critics when you really need them?     Analyzing the bearing noise is difficult due to the quality of the soundtrack, but I still expect to see at least two modes -- one for the high-spinning stator bearing and a second for the lower-spinning rotor, but .  More later.

At the moment, however, bearing noise/vibration might actually be contributing to the "success" of Al's rotor.  As you know, funny things happen to systems when they resonate, especially at certain frequencies.

Ultimately, I'm with you and would certainly like to see a WhipMag made from bronze bearings

Cheers, 

Yada..
.

[j7]

This is not a 4000HP motor, if only it were..
I think ball bearing races reduce contact surface compared to standard brass or bronze sleeve bearings, think of the amount of surface tension from even a thin lubricant on a bronze sleeve bearing....

We (Mum&Dad+family) use to have a 35ft. converted lifeboat that was on the Ocean Monache made from duralium, this had a phosphor bronze propeller shaft and greese packed glands/sleeves to stop the sea leaking in. Bearings in this case would have been a disaster.

So yes, if we scale this up then a bronze sleeve bearing may be the way to go, but we don't know if its the balls themselves that contribute towards the effect.

Regards
Rob




[/quote]

@meggerman
Sometimes the forest is so hard to find because of all the @#%@! trees.

As the fever to create a working whipmag motor first kicked in, general consciences was that the interaction of the bearings and the magnets was somehow creating the effect observed. At this juncture the idea was to ?replicate the resonance? observed. We are seeing some audio annualizes data coming in. IMHO the real thing it shows is that we are getting a lot of binding or lockup going on. Different speeds etc for different bearings but defiantly momentary binding. That translates to a lot drag. How much is hard to say. I am only a field electrician I am woefully ignorant of the available instruments available in a well equipped lab. However I would venture a guess that even there one would be hard pressed to quantify the exact amount of drag. This binding exerts a drag so fleeting that the audio analysis maybe our best bet to really observe this.

Now about the surface tension. When a rightly functioning oil bearing is in action there is NO surface tension. The shaft is floating in an oil bath and does not come into contact with the bearing. Hard to believe, but if you were to walk up to this hypothetical 4000 HP motor and took your hand and begin to attempt to rotate the assembly, surprise of surprise it is easier to turn this shaft than one of lets say a 200 HP unit that uses a ball bearing. This in spite of the much greater mass and inertia associated the extra mass.  The only losses are the oil molecules against oil molecules.

So it is my opinion, and only my opinion that the losses would be smaller in an oil bath than the surface contact points that keep binding the process up. It may also turn out to be the case that the old bearings that Al used are so worn out that they refuse to lockup. Hence the marbles in a lunch box sound.

Cheers

j7

[j7]

Cheers

j7

@all

I am sorry that I failed mention that using bronze bearings will most likely require a very precise vertical mounting.

Cheers

j7

[JoinTheFun]

Sol III = Earth

Gosh. That just shows how out of touch I am. I just assumed it must be some planet in another Galaxy. 

3rd Rock