Search found 12 matches

by --Oz--
Sep 11 2019 11:56pm
Forum: General Discussion
Topic: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's
Replies: 12
Views: 592

Re: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's

Hold on, any chance you could sufficiently magnetise a solid steel ball to use? I'm guessing it doesn't have to be a strong magnet to work? I tried it using the most powerful new magnets I have (cheata 15,000rpm HDD drives, and while it does magnetize the ball bearing, it is nothing like a new ball...
by --Oz--
Sep 10 2019 4:23pm
Forum: General Discussion
Topic: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's
Replies: 12
Views: 592

Re: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's

Not sure to be honest. I recall a small defunct wind tunnel where I used to work that was mach 3 or 4 powered by compressed air in the thousands of psi range. It would be interesting to try this method. Have to figure out a way to hold it, then use optical tach to get the rpm. I am curious how much...
by --Oz--
Sep 09 2019 10:14pm
Forum: Polls & Surveys
Topic: When Windows 7 is dead in 2020 what OS will you migrate to??
Replies: 54
Views: 3532

Re: When Windows 7 is dead in 2020 what OS will you migrate to??

@ dustNbone Thanks!!!
bookmarked, will try it soon!
by --Oz--
Sep 08 2019 12:02am
Forum: Polls & Surveys
Topic: When Windows 7 is dead in 2020 what OS will you migrate to??
Replies: 54
Views: 3532

Re: When Windows 7 is dead in 2020 what OS will you migrate to??

If you're looking for an Ubuntu with a similar look and feel to Windows, I'd go with Kubuntu. KDE is far and away the best desktop environment available period IMHO. It's got the same basic layout as Windows, apps menu bottom left, taskbar, clock, etc bottom right. No one will have trouble figuring...
by --Oz--
Sep 07 2019 10:25am
Forum: General Discussion
Topic: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's
Replies: 12
Views: 592

Re: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's

I bought 216 5mm neo magnet balls for $7 on banggood.com, but the rpm limit is ~1.1M, then I got 216 3mm balls for $6 on banggood, took a while to find 2mm balls, but they want $50 for 10! Not going to happen, lol. I got my maglev working ok (not great, its not as stable as I want it, I think I know...
by --Oz--
Sep 06 2019 11:09pm
Forum: General Discussion
Topic: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's
Replies: 12
Views: 592

Re: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's

60 billion rpm
https://www.purdue.edu/newsroom/release ... anics.html

I did mention low cost :D I play with this on my lunch time and have spent ~$30 to get to 3.8Mrpm.
by --Oz--
Sep 06 2019 9:28am
Forum: General Discussion
Topic: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's
Replies: 12
Views: 592

Re: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's

Is there any way of driving a solid steel ball bearing with reluctance torque? If not you could spin it with a jet of compressed air Yes there is, but the complexity and difficulty factor is much higher than the simple magnetic ball circuit. With the magnetic ball, there is one simple feedback circ...
by --Oz--
Sep 05 2019 11:57pm
Forum: Battery Technology
Topic: In over my head with an unbalanced 14S5P battery
Replies: 16
Views: 704

Re: In over my head with an unbalanced 14S5P battery

I been using Li-Ion 18650 and LiPo batteries since they came out. When a cell goes out of balance there is a few reasons. 1. It has lower capacity. 2. It has higher IR (internal resistance). 3. Bad BMS When good packs are built, these matched cells (both capacity and IR). Lucky I have equipment to t...
by --Oz--
Sep 05 2019 10:44pm
Forum: Polls & Surveys
Topic: When Windows 7 is dead in 2020 what OS will you migrate to??
Replies: 54
Views: 3532

Re: When Windows 7 is dead in 2020 what OS will you migrate to??

W10 is almost free, I have been fighting it somewhat and i dont like the ram it down your throat updates weather you want it or not crap-attitude. You can run W10 un activated for a long while, i have one box on it for a year now. I did buy two W10 keys on ebay for $5, both still working (MS not com...
by --Oz--
Sep 05 2019 10:03pm
Forum: General Discussion
Topic: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's
Replies: 12
Views: 592

Re: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's

Magnetism is the best method, no friction from surfaces touching each other, would benefit greatly! Also how would you even measure that kind of RPM? Electronics are fast, mechanical things = very slow. 20,000rpm is only 333 rev per sec, my best 3.8 million is only 63,000 rev per sec (63KHz), in el...
by --Oz--
Sep 04 2019 9:17am
Forum: General Discussion
Topic: 3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's
Replies: 12
Views: 592

3,808,800 RPM, 63,480 RPS, 1338mph, 2153kph, 24.3M G's

I am trying to spin a object as fast as I can for cheap (under $30).

Videos and details here:
https://www.rcgroups.com/forums/showthr ... RPM-motors
by --Oz--
Sep 04 2019 8:56am
Forum: Electric Aircraft
Topic: Quad Acrobatics Video
Replies: 0
Views: 162

Quad Acrobatics Video

Here is some of my quad flying, enjoy:
[youtube]https://www.youtube.com/watch?v=uHoFfpLSb2g&t=2s[/youtube]

My YT channel
[youtube]https://www.youtube.com/user/Ozzy333333 ... subscriber[/youtube]