3.8 Million RPM, 1338mph, 24.3M G's & Ultimate acceleration 0 to 2.1 million RPM in 1ms (0.001 second)!

MauricioB wrote:Hello, I am watching your videos and I want to ask you some questions in order to understand the purpose.
1) You electromagnetically spin a metal ball at high rpm.
2) You make those rpms extremely high until the metal ball comes to burst from the G force.
I understood what is happening.
At a certain amount of rpm the ball bursts.
It's surely meritorious to get the ball spinning at those rpm.
Now here is my question.
1) What does it achieve by popping the ball?
2) Are you looking to see how many rpm a certain material can hold?
3) Are you looking to achieve very high rpm by replacing the type of metal in the ball and thus define which metal is the one that supports high rpm?
4) Are you looking for a certain number of rpm and that the alloy of the ball remains stable?
If none of this is what you want to achieve, what is the purpose of these essays? Or do you just have fun doing this and one day it may be applied to a specific project?
Thank you, I hope I'm not being foolish, I'm just curious to know all of the above.

It started when I see a Yt video of a guy spinning a magnet to 300K rpm.
I know quite a bit about motors and I said I can beat 300K, after a couple weeks i hit 1Mrpm and I put it on the shelf, then I saw a guy hit 1Mrpm. so i broke mine out and made my 1st video and figured I could do better, about 2 months later I got 3.8Mrpm.
Yes its a magnet ball, not a steel ball. The magnet is exploding from centripetal forces (24 million G's at the equator in my 3.8Mrpm video).

Why, because i like challenging things, like racing (real time physics test that is two thirds mental), love designing, tuning testing, repeat, learning and i have to kill an hour at lunch anyways, haha.

When it explodes I can't go any higher rpm, I dont want it to explode as it is the limiting factor at the moment. 5mm got me to 1.1Mrpm, 3mm was 3.8Mrpm, the 2.5mm sucked at 2.2Mrpm.
By using the magnet ball, it makes the whole setup simple. Changing to a metal ball, makes the whole setup much more complicated, I have thought about it quite a bit, just so many projects.
No essays, just documenting what and how i did it (this gives the next guy a good start if they want to try), no secrets.

When things were just right, I seen some incredible acceleration, my best:
0 to 3.4 million RPM in 15ms, thats an average of 227,000 RPM per 1ms

I have learned a bunch from this project, experience with lenz law, cemf, avalanche events, gate drivers to name a few.

Some more info here:
https://www.rcgroups.com/forums/showthread.php?3259449-1-000-000-rpm

If you're on discord, hit me up
--Oz--#7245

--Oz-- wrote:

MauricioB wrote:Hello, I am watching your videos and I want to ask you some questions in order to understand the purpose.
1) You electromagnetically spin a metal ball at high rpm.
2) You make those rpms extremely high until the metal ball comes to burst from the G force.
I understood what is happening.
At a certain amount of rpm the ball bursts.
It's surely meritorious to get the ball spinning at those rpm.
Now here is my question.
1) What does it achieve by popping the ball?
2) Are you looking to see how many rpm a certain material can hold?
3) Are you looking to achieve very high rpm by replacing the type of metal in the ball and thus define which metal is the one that supports high rpm?
4) Are you looking for a certain number of rpm and that the alloy of the ball remains stable?
If none of this is what you want to achieve, what is the purpose of these essays? Or do you just have fun doing this and one day it may be applied to a specific project?
Thank you, I hope I'm not being foolish, I'm just curious to know all of the above.

It started when I see a Yt video of a guy spinning a magnet to 300K rpm.
I know quite a bit about motors and I said I can beat 300K, after a couple weeks i hit 1Mrpm and I put it on the shelf, then I saw a guy hit 1Mrpm. so i broke mine out and made my 1st video and figured I could do better, about 2 months later I got 3.8Mrpm.
Yes its a magnet ball, not a steel ball. The magnet is exploding from centripetal forces (24 million G's at the equator in my 3.8Mrpm video).

Why, because i like challenging things, like racing (real time physics test that is two thirds mental), love designing, tuning testing, repeat, learning and i have to kill an hour at lunch anyways, haha.

When it explodes I can't go any higher rpm, I dont want it to explode as it is the limiting factor at the moment. 5mm got me to 1.1Mrpm, 3mm was 3.8Mrpm, the 2.5mm sucked at 2.2Mrpm.
By using the magnet ball, it makes the whole setup simple. Changing to a metal ball, makes the whole setup much more complicated, I have thought about it quite a bit, just so many projects.
No essays, just documenting what and how i did it (this gives the next guy a good start if they want to try), no secrets.

When things were just right, I seen some incredible acceleration, my best:
0 to 3.4 million RPM in 15ms, thats an average of 227,000 RPM per 1ms

I have learned a bunch from this project, experience with lenz law, cemf, avalanche events, gate drivers to name a few.

Some more info here:
https://www.rcgroups.com/forums/showthread.php?3259449-1-000-000-rpm

If you're on discord, hit me up
--Oz--#7245

thanks for your reply.
Very good, you are having fun and curious about this.
That way you are learning a lot that has to do with with lenz law, etc. etc
It seems very good to me that this is the case, perhaps at some point, all that he does can be applied to something that is an even bigger project.
Good luck!

In 20 pulses, it goes from 0 to 2.1 million plus rpm, 20V, 16Arms (320W) to spin a 0.1g ball
Some math:
1 revolution = 27.65us,
36,170 revolutions per second,
2,170,000 rpm
Ball equator speed is +700mph at +7 million G's.

Scope traces:
Blue fet drain voltage,
Red hall sensor output,
Green coil current.

Added text to scope capture.