Working Magnetic Motor on you tube??

[CLaNZeR]

The operation of this motor is reliant on the the stator being able to vary its speed. The acceleration, and deceleration must be of a controlled nature so that the overall stator interaction is aysmetrical and we get a gain. If the stator and rotor were locked or geared together you would not get a gain. If you could gear it together but with a 30 degree null zone on the gearing this would allow the decelerations and accelerations so vital to get through the rotor field with a gain. In Al?s motor it appears he had the balance just right, and the inertia was in just the right amounts.

Therefore if the stator is too light, the stator will go too fast in the acelerations and slam into the wall of repulsion, if the stator is too heavy it won?t react fast enough and  it will slam into the wall of attraction. The trick is getting a dribble of one or the other.

Well I have the Rotor and sizes now as close as I can get, but the weight now is different. Might have to shave some of the Rotor off.
Anyone remember the exact weight of AL's Rotor again?





Cheers

Sean.

[ken_nyus]

From my notes, Al's rotor was 258 grams.

[geodan]

Sweet! you guys rock!!


@ All - not to re state the obvious, but t would appear to me,  that through a long process of experimentation and tinkering with what he had on hand Al hit upon just the right recipe.  From a replicators point of view I'm wondering if the information and drawings that we have include enough specific detail about the original rig assembly and components, (bearings, materials, magnets) and their physical / electrical properties for replication or if they represent an approximation of how it cold be replicated... I'm wondering if some of the finer details might not have been lost in translation... I'm thinking that everyone is sooting at a pretty small bullseye.. any thoughts on that?

A ruler in the Al's frame would have helped tremendously... does anyone recognize the DVD?

[Smit80]

That would be Behind Enemy Lines ...

Found here:

http://www.hotmoviesale.com/dvds/6659/1/Behind-Enemy-Lines.jpg

[blue_energy]

There is this by 'Just Maybe' on the Whipmag Development discussion:

If anyone is interested in evaluating the Kinetic energy of the WhipMag Rotor at various speeds you can use this formula based on a weight of 0.258 kg and a radius of 0.073m.

0.000344*(rpm/9.55)^2

It is not exact as it assumes even density of the rotor (its not, due to the magnets) and the numbers are rounded somewhat

(worked out from the following)

Ke= 0.5*I*w^2

I= Moment of Inertia = 0.5*.258*.073*.073= .000687441
(Slight difference from Pcstru, so please check it)

w=Angular velocity in radians= rpm/60*2pi

so Ke for 400 rpm= .5*.000687441*(400/60*2pi)^2 = 0.603091 Joules

Simplified and rounded =0.000344*(400/9.55)^2= 0.603492 Joules

...so 258 grams seems somewhat confirmed.