Some things about the video: -I tried first with base that was slightly (about 3mm) deeper on the middle but that made the top spin around the base since the side of the ball bearing that was on outer diameter had bit more traction and therefore generated force that drove the top around the base. -The bottom of the vacuum chamber bulges inward but I think that didn't affect a lot since the top was all around the base in the vacuum chamber in stead of staying at the just one side. -I think sharper bottom part of the top will help thing stay in one place with slightly curved base
If the spinner hits a bump, flies off and hits you in the shin...shattering the bone........can you upload the video to liveleak please? (If RU-vid won't allow it)
To hold the base center inside the vacuum chamber you could consider making about 5 or 6 little blocks cut to fit between the base and the chamber walls and place them around the base like spokes on a wheel.
Imagine a physics exam using "shitloads of" as an actual prefix. 1J = 1Nm 1kJ=1000J 1MJ=1000kJ 1GJ=1000MJ 1 shitload of joules = 23,6235GJ 1TJ = 42,3307 shitloads of joules 1PJ = 1000 TJ and so on
a mild concave to the middle of your base should help to center it and still allow movement for stability as well or you could make it like a contained gyroscope like the toy you can balance on a string...
They have a friendly, fantastic, personality that I would enjoy hanging out with. Their English is excellent they speak better than some folks here In California 😎
The higher mass will cause the top to drill down harder. Friction will always win. If you make the bearing surface smaller, it will concentrate the mass into the base and scratch it up more. Then it will track along whatever edge it will find. This will throw off the balance and it will attempt to raise its center of gravity. Research "tippy top" and see what happens. There are a lot of complicated physics problems involved here, it is difficult to understand everything that will happen through observation. If you pursue it long enough and don't give up you will learn a lot. But if you do the research first you can save a lot of money and time. 1) RAISE the center of mass. 2) Use like-hardness surfaces in both the tip and the base. 3) Use dry ice to absorb heat from friction. 4) Decrease the overall mass and concentrate the mass you need to the outer diameter of the rotor. 5) Isolate the base from the vibration of the chamber caused by the vacuum pump to conserve energy during evacuation. 6) Consider adding an air damper between the pump and the chamber to reduce vibration caused by air escaping in pulses. 7) Don't paint the top. That will throw off the balance. At those high speeds, everything counts. - Former reaction wheel technician
This is what is so special about the RU-vid comment section. You get input from a satellite technician who specialises in rotational dynamics of flywheels, who gives clear and concise advice about how to improve your results. Then someone can pop up and say “nah, you’re wrong”, for they once owned a beyblade stadium.
@@Seedyrom247 Agreed, I was just kidding with this response due to the comments complexity. I figured a concave base would help then I saw this which melted my brain. But I never owned a keyblade stadium.
no? magnetic levitation. with strong neodymium magnets on both objects(or an electromagnet at the base as well) its a lot stonger than what bismuth can do. go ahead and levitate a 4kg object with bismuth lol.
Someone in the 90's attempted to build "mechanical batteries" out of a similar concept. I remember reading that it had magnetic bearings with a special design to reduce eddy currents. Very cool! Cannot wait to see the next iteration!
Maybe make the surface you're spinning it on concave so it will center itself better. Also look into ceramic bearings, they should be harder and less abrasive than your hardened steel bearing balls.
Charles Britannia This does help recenter the top; however, it will also cause the bearing surface to track against the high outer side and induce an imbalance on the axis of the top.
I concur, a concave base with a very smooth finish should be ideal. The ceramic bearings are already a planned feature on future spinning tops, there is a video where he makes this thing on a lathe.
maybe when the vacuum gets under high pressure it pulls the bottom of the pot upward in the center allowing the base to wander toward one side(with vibration)
+simontay1984 also, the space station gets about 90% of the gravity that something on earth does. They don't lack gravity. They space station is falling, and so is anyone inside of it. There is really no point in space anywhere, that has zero gravity.
I've build spinning tops as child out of wood and lead. 1. Put you mass as far out as possible 2. put you mass as low as possible 3. Make the running point as sharp as possible out of hardened steel but softer than the running surface. 4. use a "watch glass dish" glued to a base as spinning surface. (steel on glass has a very low friction and glass is harder than steel) I turned plates with a stem in the middle out hardwood and plywood and screwed a poured lead ring on to the edge. Then I turned it round on my "lathe" (drill holding a screw on one side and a nail in a pice of wood on the other side) I started it with a rope wrapped around the "stem" and a special holder. I got spinning times around 40 minutes out of that. I think with proper construction more than 1 hour is possible and two hours in vacuum.
Very good idea! Depending on the amount of mass (and everything else) if you got 40 minutes by starting it with a rope that sounds like it was working well
I've build them 25 years ago. I have to buy the stuff and rebuild it. I experimented a lot as a child and reused everything. That's the problem if you haven't a lot of money, you disassemble old stuff to build new things. I used the lead in a steam engine as counterweight and fly wheel, in a remote controlled boat and u-boat, shoot with it with a steam powered cannon. I used up the lead for may other things.
Nice to hear, me too was a spinning top child, as a fifth grader :) I used a steel point on a mirror, my best top I built from an old tape recorder flywheel. It was perhaps 7cm in diameter and quite heavy. I had same method to start it but I had also a magnetic support which had three screw adjusted legs and it pulled most of the weight up. It rotated almost silently something between half an hour to hour, unfortunately I don't remember it any more. Most difficult was to make point concentric and to make surface of the top as smooth as possible with many layers of lacquer and sanding it.
If we consider not only the exact words but also the tone of voice, then you actually translated it surprisingly well :D Ota se mun kännykkä pois siitä! ~ Take my phone out of there!
3 things: Use a bearing between your tip and the spiningtop it self. the top should be hard and pointy - hardened steel or if you have tungsten carbide needle. Mirrors. Yes, you can normally get quite decent magnifying bath-mirrors. glass is really smooth and hard, and has a low coefficient of friction with steel. And magnifying mirrors are slightly concave, helps keeping the top in the middle.
I really appreciate your efforts for your loyal subscribers! It was a lot of fun seeing this top made and tested, and I'm looking forward to the next one.
Give it a try and use a magnifying bathroom mirror as the base. It works great for normal size tops and should also work for this one. I don't know how the glass would hold up to that monster though. But it would be cheap enough to try.
This is really awesome! I would love to see this done but instead of a top have it levitating on repelling magnets then in the vacuum chamber as well to remove even more resistance.
This is great experimental science. One variable to test could be using concave glass instead of steel as the base to reduce surface friction, as well as using a ceramic bearing ball instead of a steel one for the same reason. But I guess pretty much everyone else has the same idea :P
Know what my favourite thing is about watching Beyond the press? It's not Anni's legs, or even the cool stuff you come up with to do for our entertainment! Nope, there is a higher class of commenter on your videos! Many intelligent people with excellent things to say and hardly any keyboard warriors! Keep it up :)
Isn't one of the issues here that the bottom of your vacuum chamber still bulges inwards when the vacuum level improves, like it did in earlier videos, which causes the surface to not be level.
I'm a bit concerned about the tungsten tip though, the ball bearing already exerted enough pressure to deform the base. I would say the most important is a much harder base
I would think a tungsten point might actually start to bore into the base and slow it down faster, unless the base was also tungsten carbide or something extremely hard.
Exactly! Though it is possible to get tungsten carbide stock, the maximal width you can buy is around a cm. If they manage to keep it very steady that might just be enough for the center of the base... or the outer race/groove of a silicon nitride bearing
moving mass of 4kg with 14k rpm. really dangerous. let me stick my hand close to it fast for experiencing the wind. please never change - but stay safe nevertheless ;)
n0peable forget liquid metal and hot nickel balls. that top has a terrifying amount of momentum at those kinds of speeds. I would not want to be anywhere near it.
@@garethjones4433 Um... Im afraid You're terribly mistaken. That thing spinning "so fast" is only going what? Lets say its 300 mph or lets just say its 1000mph (its not). The grenade, something like a m67 is going to explode at about 16,000mph. Its shrapnel is going at least 3400mph pretty close to the explosion and dropping off as it moves away (just as any peice coming off the spinning metal is going to) . Besides all that I honestly dont see any problem with their saftey barrier.
I just tried the Hydraulic Press App, and to be honest, I'm really not a mobile gamer... until I played your app. Now I'm a mobile gamer. Great APP and Awesome Video! Keep up the amazing work! 😄
I used to do testing on engine cooling fans. We had a vacuum chamber made of 2 ply 2" thick cold rolled ballistic steel. It had an air powered air turbine that would spin to 130,000 rpm. We would test test the fans in vacuum until they failed. It would take 2 days to spool up until they failed. When the nylon/fiberglas reinforced fans failed you would hear "whoomp", then the motor would slow down quickly. When the lid was unbolted, all that would be left was a bunch of fluff. Pretty cool.
Air resistance isnt the thing holding it back. Its the friction from what its spinning on. Try a mirror, or something similar for the least resistance UwU
I appreciate your videos a lot, very enjoyable and good to watch. I'm poor so I can't donate or support your videos except by videos and advertisements, but I want to express my gratitude for the content you make. please keep following your intuition and using the skills you have. !
When you make the new base what about making it plano-concave to let gravity help keep it centred? something like |\/| (you get the idea, obviously not as harsh an angle)
We ran a ~20mm brass spinning top on eyeglass lens for what I think was 45 minutes in athmosphere, started with pressurized air. The tip was a end of a really small tungsten carbide drill bit, something like 0.35mm
That is awesome! Can you imagine how much power was stored up? Reminds me of the show Supreme skills. It's a Japanese show where they make a top to see how long they can make it go.
You could make that piece the spinning thing is sitting on shaped like a bowl, so it will stay at the center. The bearing ball should be. as sharp as possible, somewhat like a needle, because this decreases friction, which I think needs the most energy in the vacuum. Mabe also put some oil at the metal where it spins on to further decrease friction.
actually it doesn't have to be sharp if its perfectly round. if you have a hard material(thats not plastic or aluminum like on cheap spinning tops) a perfect ball will be as good and even better than a needle. a needle tip in this case would make it unstable. ball bearing balls are very round. thats a lot better than a makeshift tip. balls are easier and more precise to make than needle shaped things.
simontay1984 It should be VERY little oil because if the base is curved the oil would all gather to the bottom and the top would be spinning in a pool... Not very good if you want as little friction.
The biggest problem with a sharp point is that it will cause friction. Why? Because at the speed this top is moving the point of contact will heat up. I am sure if they were to use a Temp gun on the tip they would be shocked at how hot it becomes. Now the total mass of the top pressing down on that single point no matter how hard will ultimately cause wear on the tip and damage to the base it sits upon. The incorporation of magnets in to the top plus a super cooled environment plus a vacuum chamber ( not sure how the vacuum would effect the liquid nitrogen. Possibly a split container where the cooling is out side the vacuum chamber). Anyway that is my two cents.
Love Your Video's!! Much more interesting than RU-vidrs that think their lives are important enough to us all that we want to watch videos of their everyday lives!! LOL!! Great Stuff Love It!!!
Out of everything you have done up to 2019 This scared the shit out of me the most I have a refrigerated centrifuge I use for food And it spins about 2 gallons of liquids and it is made for it And it still freaks me out Bit this is why I love your channel
