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Author Topic: OC Whipmag Test Co-ordination Thread  (Read 6102 times)

JAG

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OC Whipmag Test Co-ordination Thread
« on: January 11, 2008, 04:39:15 AM »
Hi All,

New member, been reading since the OCAL Whipmag thing started.

Congratulations and my admiration for anyone doing replications of AL's device.

Hopefully if/when we get working replications it will take some of the pressure of OC and AL.

Everyone over at the Steorn forum has a pet theory and/or test that they would like to see done, So I'd like to open this thread up as a place for replicators to state what tests they are planning, what they are trying to test for etc...In an effort to make efficient use of everyone's time and not re-invent the (spinning ;)) wheel.

See this comment for example from Al

"Hi Mary. I see we are talking about different things. I think you want me to do what I call endurance runs in the various conditions. I just don't have time, and I need a better hypothesis than " OU means it will run forever" to test. Now that I have a reasonable prediction of how long it SHOULD run IF it has 17000 Joules available, that is something I can reasonably test. Let's see--40 hours per test, times say 3-5 runs to get a reasonable mean, times the 4 conditions you mention. That comes to, let's see--800 hours, or 10 weeks of fulltime work.

I'll get right on it. "

Tests/information I would love to see (but am not in a position to build my own rig)...

Footage of rig with load (Al has reported he has done some tests with a model airplane prop which lowered the RPM's but did not change the rundown times) I'd dearly love to see this in a replication with supporting photo's/video.

Endurance run - How long will the thing run until it stops? (AL used Tach readings over a short period and reported them to the forum, until to fiddled with one of the stators and the drive stator fell "out of synch"). This would be ideal - especially with webcam or time lapse photography.

What other tests would people like to see on the rigs?


Dyamios

  • Jr. Member
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  • Posts: 51
Re: OC Whipmag Test Co-ordination Thread
« Reply #1 on: January 11, 2008, 04:44:09 AM »
I think it would be fun to test the potential electrical output.

A simple coil connected to a diode-bridge and smoothing capacitor would probably be sufficient to light an LED, given the voltage is high enough.


Same kinda test as with a load though... just with shiny lights  :P

geodan

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  • Posts: 79
Re: OC Whipmag Test Co-ordination Thread
« Reply #2 on: January 11, 2008, 06:17:31 AM »
Hi again Jag! :)

I've been

I've been following the Steron threads about Whip Magnet  PMM AKA OCAL PMM,

I'm in the process of getting pricing from local (to me) vendor for machined parts (a la Sean) to replicate the OCAL PMM... My vendor is Small Parts Manufacturing. in Portland Oregon,   if there is anyone else on the forums interested in also getting the the basic bones for their own replication. There might be some economy in a batch order...

If anyone's interested please drop me a note.

Thanks

Geodan

Thaelin

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Re: OC Whipmag Test Co-ordination Thread
« Reply #3 on: January 11, 2008, 02:43:24 PM »
   Garsh darn, someone actually "local" to the PDX?  May have to hang out for a week and see if I still have a job left.  Keep me in mind tho

thaelin

ken_nyus

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  • Posts: 229
Re: OC Whipmag Test Co-ordination Thread
« Reply #4 on: January 11, 2008, 02:55:06 PM »
Hi again Jag! :)

I've been

I've been following the Steron threads about Whip Magnet  PMM AKA OCAL PMM,

I'm in the process of getting pricing from local (to me) vendor for machined parts (a la Sean) to replicate the OCAL PMM... My vendor is Small Parts Manufacturing. in Portland Oregon,   if there is anyone else on the forums interested in also getting the the basic bones for their own replication. There might be some economy in a batch order...

If anyone's interested please drop me a note.

Thanks

Geodan

Hey Geodan, sent you a pm, I'm interested,even if it is just two of us and we go half.

I have the magnets, since yesterday, just need some fabricated parts!


JAG

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  • Posts: 16
Re: OC Whipmag Test Co-ordination Thread
« Reply #5 on: January 14, 2008, 04:59:46 AM »
Temperature test on the Dampners.

It's been theorized that the Dampners are acting as magnetic sinks and may change temperature. A data set pre and post any decent sized run (say 20 minutes) should confirm that.

JAG

magnetrecharge

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  • Posts: 7
Re: OC Whipmag Test Co-ordination Thread
« Reply #6 on: March 30, 2008, 06:37:14 PM »
Gentlemen, I am surprised no one has figured this out yet. Al's discovery was by mistake as many things are discovered.
Mold and penicillin come to mind. What is happening here is an uncontrolled runaway oscillation. His machine is working on resonance.
Think of your washer or other large mass when it becomes unbalanced. It slows down but the vibrations amplify in intensity. The key is "CONTROL"  This is the main reason many have been unsuccessful. We all know it takes very little movement to make a magnet stator spin with another magnet. Picture the small stators vibrating very fast then couple that with the runaway effect. Al got lucky! His set up is resonating at a specific frequency and that's why at a certain RPM is locks. It's vibrating at
a sweet spot. I have no time or room right now to experiment but my theory can be proven by inducing vibrations at different frequency's
to some or all of the units rotating parts and observe the effect. The secret here is to control the oscillations at is starts to accell then bring the Rpm back down and let the unit repeat. Think of a magnet as DC current. If magnets put out an AC wave form all our problems would be solved. They don't. What keeps this spinning is the vibration of the small stators.  I don't believe the weight or shape of the main rotor is critical. It's the stator magnets and how they "VIBRATE".    If anyone get's a working unit I have a prototype molding shop and can replicate the rotor and other small plastic parts 100%. I can make small runs very very cheap. I can get 100 pulls from one mold.