By Sterling D. Allan
Pure Energy Systems News
April 1, 2013; 3 am GMT
I just got off the phone with Jim Dunn, having had a great brainstorming session regarding this upcoming demonstration of Muammer Yildiz’ all-magnet motor at the Inventors Expo in Geneva, April 10-14 that I’m going to be participating in, thanks to 60 (so far) of you who have contributed to make that possible (thanks again!).
The story I posted yesterday, encouraging people to contribute to help a PhD student build a contraption that could measure the output of the motor-propeller via a plexiglass tunnel and receiving propeller attached to a dynamo, isn’t getting any enthusiasm. I posted the fundraiser for that last week, an no one has contributed, unless you count my contribution today, trying to prime the pump.
What Jim and I both decided would be the easiest and most credible way to calibrate the output of the propeller that Mr. Yildiz plans to have attached to his motor, will be to publish the exact specs of the propeller — the make, model, dimensions, pitch, blade size, etc — so that multiple laboratories can generate a curve of performance, from low rpm to high rpm.
In fact, I bet the blade manufacturer has a curve already generated, which could be one of the data sets for comparison to the other labs that corroborate that data. The curve should look something like this, except instead of “wind speed”, one axis will be “rpm”; and instead of “watts produced”, it should be “watts equivalent” (or load):
So once in Geneva, if we measure a rotation speed of 2000 rpm on Mr. Yildiz magnet motor with that same propeller, then we can go to a commonly-generated and accepted curve to say how many watts of power that represents, and everyone is going to be happy with that calibration.
All the universities that are coming to measure the device should have performed this calibration for themselves on the exact same blade make/model, or something close thereto. Or they should be ready to accept the data generated by other labs.
What will be great about this, is that now Yildiz will be free to show off a little bit.
According to Yildiz, the all-magnet motor that he has been running to power the 25-cm propeller at what he is saying is 380 watts equivalent, at around 2,000 rpm, is capable on the higher end, of 20 HP, which is 39 times greater than that. The reason he isn’t planning on going higher than the 380 Watt equivalent at the expo for ongoing testing is because the bearings he has on it are not properly matched to stably handle much more than that. But he is willing to give short duration demos to show that the output can be much more than 380 Watts.
- It will create a local blizzard condition, blowing papers all over the place.
- It could cause the motor apparatus to start moving from the propulsion force, thus creating a safety hazard.
It could suck papers and other items (e.g. clothing, toupees, wigs, pens) into the front end, ejecting their shrapnel out the other side.
In fact, one way we could calibrate this would be to see how far away a man has to stand before his toupee is blown off. For example, we might see data like: 1/2 foot = 30 watts, 3 feet = 100 Watts, 6 feet = 300 Watts, 9 feet = 1,000 Watts, 12 feet = 3,000 Watts, 15 feet = 10,000 Watts, 18 feet = 30,000 Watts.
Not a good idea?
No, the 20 HP demos will have to be reserved for the parking lot at night, where we might fasten a seat and take turns having rides around the empty car park. Or, better yet, we could adapt a skateboard, and measure acceleration per weight of the rider, while also plying an obstacle course.
Okay, it must be the approaching April 1 that got me in the mood (Turkey is already into this date, as of the time of this writing); but actually, these things are not far from the truth of what could be done if this all-magnet motor is for real.
So, let me see if I can get the specs from Mr. Yildiz of the propeller blade he intends to use at the expo.
Check back on this story around 6 am MDT (noon GMT) on April 1 or later. Hopefully we’ll have the info for you by then. Presently, they’re sawing the zzzz’s.
April 1; 7:30 am MDT update: Halil will ask Mr. Yalidiz for the fan specs, including the distance the fan is from the motor and the dimension of the motor in front of the fan, so that can be replicated as well (it will impede the flow of the incoming air).
On April 02, 2013 5:23 AM [MDT], Halil wrote:
Sorry that I cannot get out of the bed, because of having 39 degrees of fever for 2 days.
I called YILDIZ and got the info :
The motors have a diameter of approximately 35-40 cm
The shaft is 45 cm long, 17 mm thick
The propeller stays 5-10 cm far from the motor’s face
The propeller has a diameter of 40,6 cm
The codes on the propeller are as follows : 406×254, 16×10
I hope this info can help you. The propeller is just a simple one. There is no further info on it.
There may be also other propellers that are suitable to be found at the air model shops. But I don’t know the way to mount them on the shaft.
On April 02, 2013 2:25 PM [MST] Halil added:
I think, it’s this one : http://www.zkauf.de/apc-luftschraube-16-x-10-elektro-propeller-406-x-254-in-cm-e160824977061.html
I asked him to give us info on the number of blades, their pitch, and ideally the manufacturer, make, model. A photo would be nice, too. [I've asked him to confirm that the above link is the actual blade.]
April 3, 2013; 7:40 am update: Halil sent an email last night saying that that link above is indeed the same blade he will be using.
Jim said in response: “This may only absorb 50-100 W? Can we get a bigger prop?”
Jim said that by putting this fan on a motor of known performance, you can create a curve with rpm on one axis and Watts load on the other axis, and that the accuracy should be withing 10%. In generating such a curve, for reasons of safety, he doesn’t see the need for us to go any faster than 3000 rpm. Also, we will try to keep in front of the fan cleared to at least 1.5 meters.
The the level of accuracy, or inaccuracy we are looking at in the expo setting, taking into account barometric pressure is probably not important. But, if you happen to have that data when taking your tests, you should include it.
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