Introduction: Will It Centrifuge? (Part 1)

Picture of Will It Centrifuge?  (Part 1)

What happens when things spend five minutes at 8,500 gravities?

Shall we find out, boys and girls?

I was going to do this as a video, but since you can't actually see anything happening inside the centrifuge, I decided that would be boring.


octopuscabbage (author)2010-07-27

Oh kiteman. How i enjoy thee.

Kiteman (author)octopuscabbage2010-07-28

Thank thee.

octopuscabbage (author)Kiteman2010-08-01

Centerfugeing applesauce would be cool.

Sunny124613 (author)2008-08-27

nice,and the toothpaste is cool 5/5 stars

GorillazMiko (author)2008-05-18

~~Now we go search for part 0.~~ Cool. +5/5 stars.

xACIDITYx (author)2008-05-16

Would it, umm.... Be possible to make a centrifuge out of a bicycle tire and a weedwacker, where the weedwacker holds the tubes and the weedwacker is the motor?

Kiteman (author)xACIDITYx2008-05-16

Possible? Yes.

Wise? ....I'm not so sure

xACIDITYx (author)Kiteman2008-05-16

And do it all under a garbage can (for safety purposes).

Kiteman (author)xACIDITYx2008-05-16

The walls of my little centrifuge are half an inch thick and seem to be fibre-reinforced.

Your wackifuge has (potentially) much greater energy stored in the the rotor - I think it could put a sample clean through a garbage can...

xACIDITYx (author)Kiteman2008-05-16

Ehh, I'll use some duct tape or something. I'm not concerned with safety.

Kiteman (author)xACIDITYx2008-05-17

Er, you should be!

Think what a weed-wacker does to weeds - that's not because the wacker is sharp, just fast.

Scale that up with a bicycle wheel - adding circumerancial speed and momentum, then the wackifuge has the genuine potential to remove limbs in an extremely messy way.

xACIDITYx (author)Kiteman2008-05-17

Yeah, I suppose. I guess I'll be safer, like 2 garbage cans and I'll hide behind a brick wall. That seems safe enough...

Kiteman (author)xACIDITYx2008-05-17

Add a remote-switch and I'll stop worrying that my projects have inspired you to bodily mutilation.

technodude92 (author)Kiteman2008-05-17

thats what disclaimers are for

xACIDITYx (author)Kiteman2008-05-17

Okay. I'll be safe.

Gjdj3 (author)2008-05-13

I liked this a lot. It was interesting and showed some of the cool effects of a centrifuge. Also, (not that my opinion matters much, I'm 14!) I disagree with some of the other posts that state this is "boring" or useless. I think it's a great way to show some basic results from an experiment. I liked it. Oh, and where can I get a centrifuge? Or are they very expensive?

Kiteman (author)Gjdj32008-05-14

Thank you, and lack of age doesn't make your opinion irrelavent, lack of intelligence does (so you're fine)> The centrifuge costs about 80GBP, and the wall-wart was another seven. There are posts further down (May 5th) where I posted links to an online store.

Gjdj3 (author)Kiteman2008-05-14

Thanks. I totally missed the links. I'd like to do some experiments using one of these so... I guess it's time to start saving up money!

Kiteman (author)Gjdj32008-05-14

Or you could keep an eye out for Killerjackalope's "How to make a centrifuge" 'ible he has in the pipeline.

Gjdj3 (author)Kiteman2008-05-14

Sounds promising. Centrifuges are really cool so I'm excited to start working with one!

Kiteman (author)Kiteman2008-05-14

(Where on Earth did that ">" come from?)

Lithium Rain (author)2008-05-09

I like it. It's not poorly thought out, it's succinct. Your bad slideshows( and instructables) are the ones where the writer just says everything he can think of and posts every picture he took that week, no matter how boring or irrelevant.

Whoops, I didn't mean your bad slideshows as if you make bad ones, it was just a figure of speech...

Kiteman (author)Lithium Rain2008-05-09

It's OK, I got what you meant.

Lithium Rain (author)2008-05-08

Ha! This is like "will it blend?"...

rc jedi (author)2008-05-07

cool! build a LARGE centrifuge and disguise it as an elevator. separates the gold from the chaff. "Did you bring your dramamine?

dchall8 (author)2008-05-06

I was going to do this as a video, but since you can't actually see anything happening inside the centrifuge, I decided that would be boring.

But it did not occur to you that a series of pictures, unexplained pictures, would be boring also? Maybe it's just me but I'm the kind of guy who likes to read text about what you did, what equipment you used, where you found the equipment, what materials you tested, where you found them (if they were not found around the house), why you tested those objects and materials, and what the results were.

Okay, while I was writing this I noticed that each picture has a a very subtle caption written in nearly invisible ink and 4-point font. I still can't give you any points. I like paragraphs.

Obviously by reading the other comments this project has some appeal. I think if you were to write this up properly and dispense with the gimmicky slide show, you would have a much better Instructable.

Kiteman (author)dchall82008-05-06

Except it's not an instructable, it's a slideshow. I do know how to write a proper Instructable.

Slideshows are not instructables, they are pictures of things that have been done (although, it's been so long since you wrote an 'ible, maybe you missed the introduction of the new formats?). They don't need lots of explanations, especially when they're written for those members with that certain sense of fun that seems to have escaped you today. This isn't a "how to", it's just the results of a few casual experiments, stemming from a forum thread. Maybe it's time you started taking part in the whole community, then you wouldn't waste your time typing scads of unnecessary criticism?

Sorry you don't like the caption text - complain to the management about that one, there are no options available - but I'm crediting the readership with either the education to know what centrifuge and 8,500g mean, or at least the intelligence to be able to ask.

dchall8 (author)Kiteman2008-05-06

I see both of us are cranky today. I know you know how to write an Instructable. Yours are some of the best. I was shocked to see such an Instructable as this one with your name on it. Slide shows suck! There. If the management cares for our opinions. They suck. The concept sucks and the tools suck. Given that they suck, at least you used the tools better than most slide shows. Looking for a compliment? That's about as good as it gets today. Sorry I had to take up this space to say that but several things brought me to your Instructable. One was your name, because you write the good ones. Second was that I was the engineering project manager for the redesign and overhaul of the human centrifuge at Brooks AFB in the 1980s. But if I feel I need to update my knowledge of acceleration science, I'll be sure to ask you. My point was that there is nothing here. You have pictures of a can with knobs (presumable a centrifuge) and a lot of little bluish colored cups. As they used to say, "Where's the beef?" or "Show me the money!" If I wanted to replicate your work, how would I do that? Where do I get a centrifuge? Where do I get the blue cups? Are there any precautions to take when running it? (yes there are). Why would I want to have centrifuge? And if your answers send me back to the forum, that's fine. Just provide a brief explanation and a link. The fact that this Instructable was in reply to a forum thread would have made an excellent entry into your introduction to the Instructable/slideshow. Your cryptic intro was a coded message that only those participating in that specific forum entry would benefit from. All I'm saying is that an unexplained slide show is a waste of bandwidth. I expected better from you. Not that I need to justify my Instructables experience to you, but I do participate in the forums. My interest in the forums runs about 90% less than my interest in the creativity found in the Instructables themselves. Please don't reply that you participate more so you are a better Instructables citizen. That's not how it works.

Kiteman (author)dchall82008-05-06

Feel better?

dchall8 (author)Kiteman2008-05-06

Yeah. You? Looking forward to your next Instructable. Seriously.

Kiteman (author)dchall82008-05-07

I am today. Am I allowed to do another slideshow if I explain it better?

dchall8 (author)Kiteman2008-05-07

If you did a slide show with an explanation, you might be the very first person in Instructable history to do it. That would be great! With your obvious talent and skill at making this website sing, it would be a pleasure to see what you do.

Kiteman (author)dchall82008-05-07

That's next weekend sorted, then...

mrbob1000 (author)2008-05-05

I want one... you should give us a tutorial on how to make our own centrifuge

I may have a go at making a centrifuge, If I could get some data about how fast that thing has to spin...

Kiteman (author)killerjackalope2008-05-05

This one spins at 13000rpm, but equivalent forces can be generated with slower rpm and greater diameters.

Try this for starters.

killerjackalope (author)Kiteman2008-05-05

Thanks the other thing I'd need to know is the diameter of the actual centrifuge disc, the spinny bit...

Kiteman (author)killerjackalope2008-05-05

Er... It's locked in the shed now, but the whole thing is only about 15cm across. If I were making my own centrifuge from scratch, I'd base it around a bicycle, maybe on it's side.

killerjackalope (author)Kiteman2008-05-05

Umm Ok I was thinking double diameter and Half speed... Or maybe go with a larger diameter again and work it out for around 10,000G just to top the commercials...

Kiteman (author)killerjackalope2008-05-06

g = RCF = 0.00001118 × r × N2


g = Relative centrifuge force
r = rotational radius (centimetre, cm)
N = rotating speed (revolutions per minute, r/min)

Kiteman (author)Kiteman2008-05-06

Blasted formatting!

g = RCF = 0.00001118 x r x N2


g = Relative centrifuge force
r = rotational radius (centimetre, cm)
N = rotating speed (revolutions per minute, r/min)

killerjackalope (author)Kiteman2008-05-06

Cheers kiteman, I was looking through my notes for the equation...

Kiteman (author)Kiteman2008-05-05
Kiteman (author)mrbob10002008-05-05

I didn't make it, I was sent it via a newsletter I signed up to quite a while ago - every so often, out of the blue, I get sent valuable scientific equipment with some vital part missing (this centrifuge is worth a couple hundred pounds, but they didn't send me a suitable power supply to go with it). They once sent me several samples of dna to test in an electrophoresis cell. They even sent fresh electrodes for the cell. They just never sent me the cell. My favourite kit was a microchemistry kit - doing clever chemistry with single drops of liquid sitting on a sheet of acetate, instead of several millilitres in test-tubes. It's rather good for group-work.

budsiskos (author)Kiteman2008-05-05

what is the name of the newsletter?

Kiteman (author)budsiskos2008-05-05

Bizarrely, the newsletter no longer exists, but there is now a shop.

Kiteman (author)Kiteman2008-05-05

Oh, the centrifuge is much cheaper than I was led to believe.

darth2o (author)2008-05-05

Blood, try blood!

Patrik (author)darth2o2008-05-06

Virgin blood!

... sorry, wrong forum...

About This Instructable




Bio: The answer is "lasers", now, what was the question? If you need help, feel free to contact me. Project previews on Tumblr & Twitter: @KitemanX
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