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3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's & Ultimate acceleration 227,000rpm/ms Cox_ba12




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Post  --Oz-- Thu Aug 01, 2019 9:33 pm



Last edited by --Oz-- on Fri Aug 02, 2019 7:30 pm; edited 1 time in total
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Post  Marleysky Thu Aug 01, 2019 10:45 pm

oh. i  can't   wait!  Clapping
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Post  --Oz-- Thu Aug 01, 2019 11:15 pm

@Marleysky wrote:oh. i  can't   wait!  Clapping

2+ years ago I got to 1Mrpm and then put it on the shelf, then I saw another 500Krpm video and it energized me to make a video of my 1.1Mrpm. I just play with this on my lunch time. I am a thinking/tinkering/optimizing/tuning/motorsports racing type of guy, so I started optimizing all aspects of my goal (high rpm), I started with the FET drive circuit, then better hall sensor, then coil (even built a ultra low inductance coil (faster current rise time) that was doing 700+ amps), then ball containment/etc. It was a fun ride, I am at the limit of the 3mm ball, I need 2 or 1mm balls now, but after a few months of searching, I finally found 2mm ball,,,,but for a arm and leg, so i never bought them.

Regarding the 3.8Mrpm video, I have the raw video, but nothing exciting about it, just haven't spent the time to put it together.
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Post  1/2A Nut Fri Aug 02, 2019 3:22 am

Bare in mind this is a Cox engine forum and other IC engines.
If you make this your master E thread for all your activities I imagine
the folks here will be ok with it. All other threads need to stick with
IC offerings to avoid any fussing. Look forward to a motor that can
hack duration for more than 100k rpm without slinging magnets.

Here is the vid from OZ:



Popcorn


Last edited by 1/2A Nut on Fri Aug 02, 2019 8:44 am; edited 2 times in total
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Post  getback Fri Aug 02, 2019 7:07 am

Man that's just WILD !! Good flight to sight , never seen this before (but i am old ) Old Bugger Enjoyed Thanks , look forward to some more bounce
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Post  balogh Fri Aug 02, 2019 12:43 pm

Deleted my reply..may have overlooked something
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Post  getback Fri Aug 02, 2019 2:01 pm

This was what i was looking at  
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Post  balogh Fri Aug 02, 2019 2:10 pm

Eric I watched the same vid but could not link its contents to this thread...but thought I am a non-native English speaker dumb...$$$ and convinced myself that I do not have to understand everything like the point of the title of the thread...I still do not do but this is my bad.. Very Happy
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Post  Oldenginerod Fri Aug 02, 2019 5:32 pm

@balogh wrote:Eric I watched the same vid but could not link its contents to this thread...but thought I am a non-native English speaker dumb...$$$ and convinced myself that I do not have to understand everything like the point of the title of the thread...I still do not do but this is my bad.. Very Happy

I don't think it's a language thing.  I'm a native English speaker and I can't link any of this to our forum- not the videos or the subject matter (which I don't get at all Huh... ).  What's the point?
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Post  Mark Diedrichs Fri Aug 02, 2019 6:45 pm

What in the world is go'in on??? What planet are you folks from??? He,Ha!!! Please break it down so us USA home Boys and Girls can understand the exchange equation. Or is it just me? I try abide by the KISS principal whever possible!!!...Peace , Mark
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Post  --Oz-- Fri Aug 02, 2019 7:12 pm

EDIT: I edited the first post with the videos and links to the info.

In my first post in this thread, there is two links (the form does not highlight them so they look like normal text, and not obvious they are clickable, sorry I dont know how to use this forum), if you click on them, there is detailed info on what is going on. Basically i saw a video on YT that a guy got to 300,000 rpm, and I took it up a notch. If you look at the schematic and setup, its pretty much is the KISS principle. The second link takes you to the ultimate acceleration info, basically, the is  0 rpm to 3.2 million rpm in 25ms! 130,000rpm/1ms.
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Post  --Oz-- Fri Aug 02, 2019 8:08 pm

@1/2A Nut wrote:Bare in mind this is a Cox engine forum and other IC engines.
If you make this your master E thread for all your activities I imagine
the folks here will be ok with it. All other threads need to stick with
IC offerings to avoid any fussing.

It said "Off Topic! Post anything, Cox or not!", that and all the rpm talk I figured it would be ok,,,? Smile
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Post  Mark Diedrichs Fri Aug 02, 2019 8:38 pm

3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's & Ultimate acceleration 227,000rpm/ms 20190720
Are we talk'in about a ufo or a 049?? That kind of RPM is out of the norm.???  Hope when I wake up in the morning maybe there will be more clarity!!!! Otherwise I'm just gonna sleep in!!!! Not trying to be rude, Don't quite comprehend??? Finky And I are trying to figure it out.
Spank me in the morning then just walk away!!!! All Good, Mark



























111
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Post  1/2A Nut Fri Aug 02, 2019 11:40 pm

Yes your golden it's in the off topic forum all set Old Bugger Thumbs Up
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Post  --Oz-- Wed Mar 17, 2021 6:45 pm

I thought gaining 130,000rpm/1ms (millisecond or 0.001s) was quick:
Here is 0 to 3.4 million RPM in 15ms, thats an average of 227,000 RPM per 1ms!
3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's & Ultimate acceleration 227,000rpm/ms 0_to_310
More info here:
https://www.rcgroups.com/forums/showthread.php?3315877-Ultimate-Acceleration%21-0-rpm-to-3-2-million-rpm-in-25ms%21-130-000rpm-1ms


Last edited by --Oz-- on Fri Mar 26, 2021 5:01 pm; edited 1 time in total
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Post  Cribbs74 Wed Mar 17, 2021 9:13 pm

It would be helpful if you showed/explained your apparatus (as in what is actually moving) most folks on here haven’t even seen an oscilloscope except for on Star Trek. They also have no idea what they are looking at. A quick explanation of the screens x/y axis , function of the time base and volts per division knobs(settings) might go a long way in showing what is going on. A short explanation of your waveforms seen on each channel would also be helpful.

Ron
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Post  --Oz-- Wed Mar 17, 2021 11:11 pm

Its all in the videos, video descriptions, the rcg thread I linked to and if you have read this thread.

A quick summery,
Spinning a 3mm magnet ball that is contained in a nylon standoff, (other YT'ers, put the ball in a pill bottle and it thrashes around, lucky to get to half million rpm).
Its spun by a coil, the coil is driven with a fet (switch), the fet is timed my a hall (magnet) sensor, as the ball comes around, it triggers the hall, then turns on the fet that powered the coil, that pulls the ball around, then the hall switches off as the magnet north comes around, so the coil turns off, then repeats, as high as 63,480 times a sec.

The scope is just a ultra fast volt and amp meter, time is along the x axis,
The red is the Hall output voltage signal (vertical is voltage),
Green is the fet and coil current (vertical is amps, more amp = more magnetic field)
Blue is the fet drain voltage (vertical is voltage).
The hall triggers once per rev, so looking at its freq (cycles per sec) times 60 = rpm. My fasted is 15.7us (0.000,015,7 of a second) per rev.

Most of these balls only last a second or two do to the high speed causing millions of G's (at the equator of the ball), the highest I have got to is the name of this thread:
3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's

When I get lucky, when everything is just right, the ball just rev's up quickly, and thats what my last post was about:
It accelerated 227,000rpm/ms for 15ms for top speed of 3.4 million rpm.

Thanks for posting.


Last edited by --Oz-- on Sun Mar 28, 2021 1:48 pm; edited 1 time in total
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Post  --Oz-- Thu Mar 18, 2021 2:36 am

So when I started with 5mm neo magnet balls and was stuck at 1.1Mrpm (exploding), I tried 3mm and much better (3.8Mrpm). I finally found 2.5mm and hoping to up my speed, I also did a bunch of other circuit changes, but the 2.5mm balls just consistently explode at ~2.2Mrpm, so it was a let down, but I learned a lot and the circuit improvements will let me go forward. Some ask why I am doing this, my brain enjoys designing/building/troubleshooting/tuning/testing/learning.
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Post  davidll1984 Thu Mar 18, 2021 12:19 pm

It remains very interesting but if only it will be possible to use another practical utility? Tink is bit scary métal parts flight al over the place look like litle explosions I like the graphs on the oscilloscope I would use it to anodize monitoring Very Happy
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Post  --Oz-- Fri Mar 19, 2021 12:03 am

@davidll1984 wrote:It remains very interesting but if only it will be possible to use another practical utility? Tink is bit scary métal parts flight al over the place look like litle explosions I like the graphs on the oscilloscope I would use it to anodize monitoring Very Happy
I understand,,,,,,,about 10% of what you said Cool
Regarding your avatar, I got to drive a Rothmans Porsche 962 at big willow in CA, what a phenomenal car!
3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's & Ultimate acceleration 227,000rpm/ms 85-por10
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Post  davidll1984 Fri Mar 19, 2021 2:52 am

Waw a porsche 962 driving such a car is the experience of a lifetime me the only porsche that I could afford at that time was m'y litle 924s I am not rich I work very hard After several mishap  financial loss  Wrecked my drift car a 2016 toyota frs gt86  A empty schoolboy buss got my back Run up on me backwards coming out drive way i still own my 1991 skyline r32 despite all this I will be ready tomorrow to start again The race was my whole life Now I take care of my son at home... race I left this world behind me it's in the past One day maybe I'll go back to the tracks wit m'y son Niko One day he will ask me for these trophy y own It is from where?? 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's & Ultimate acceleration 227,000rpm/ms 16161310
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Post  --Oz-- Fri Mar 19, 2021 1:49 pm

I got to drive the 962 because I helped out a good buddy that fixed older race cars. I met him at a electric rc on-road card race. He asked a lot of good questions and we became friends, he constantly asked car electrical questions, his shop was in the same city I lived so we hung a out a lot. I got to see some awesome cars come through his shop and helping mostly with electrical stuff he did not know.

AIS, the American indycar series was awesome, he bought a used 1989 march indycar w/o motor for $17K, put a $5K v8 crate motor in it and was bang for buck heaven, besides it eating tires alive, lol. I got to drive it too.

I did a lot of HO slot cars, then 2 decades of electric rc car on-road (won a couple roar national and a yokomo titles, 2nd in the 1999 yokomo worlds), then a decade of pc sim racing. I looked at go-cart's, just the tires were a wallet check, to be competitive in the 100cc class was ~$25K a year in tires/consumables/maintenance, I decided to do RC cars.
3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's & Ultimate acceleration 227,000rpm/ms Rc-sed10
3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's & Ultimate acceleration 227,000rpm/ms Rc10-l10
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