The static electric fields on the nonconducting beads and fan were interacting to push the beads around. Try this again with a metal fan.
@lehkziksdied4 жыл бұрын
👌
@octogecko4 жыл бұрын
*Science noises*
@OfficialHansRoy4 жыл бұрын
👌
@explorerkiil4 жыл бұрын
👌
@colinross5714 жыл бұрын
👌
@dankuchar68213 жыл бұрын
Air friction is not what's causing them to move around. It's static. The static between that plastic fan and those beads is going to be huge. Remove the static and they won't move except for the few that physically come in contact with a fan blade.
@tv-on-da-gochannel57913 жыл бұрын
Great mention,, temperature would then also help dictate the volatility and level (ie, amount) of static that'd come into play
@jonathanodude66603 жыл бұрын
@@tv-on-da-gochannel5791 temperature? What’s the effect of temperature on van Der waals forces? Wouldn’t a higher temperature reduce the strength of static attraction by increasing the random assortment of charges and preventing alignment for long enough periods of time?
@AbhinandanKumar-vq9xv3 жыл бұрын
What's static?
@jonathanodude66603 жыл бұрын
@@AbhinandanKumar-vq9xv electricity is the movement of charge. Static means not moving, so static electricity is charges that are building up in one spot. If you’ve ever shocked yourself on a car or other metal object, that’s a static charge building up and discharging through you. You can see it in action by rubbing a balloon in your hair then letting go of the balloon (it sticks) or rubbing your feet on carpet and touching someone else or something metal.
@dankuchar68213 жыл бұрын
@@AbhinandanKumar-vq9xv Static is short for static electricity, which is just electricity not caused by moving charges. In other words it's a static or not moving charge So there's no current involved. Plastic fan will develop a charge as it rotates and the balls develop charge. Opposite charges attract while the same charge repels. So the rotating fan causes a force on the balls. So it's electricity that's moving things around not air.
@andrieslouw65884 жыл бұрын
0:21 " I can adjust the speed of it " * Minecraft cow sound *
@ParodieHecker-mobile4 жыл бұрын
Underrated
@clickednebula34 жыл бұрын
I hear it normally...
@mairacristian544 жыл бұрын
real life cow* (or just cow) , not minecraft
@ChristmasTurki4 жыл бұрын
Overrated
@Rdnv094 жыл бұрын
rated
@glovepro12563 жыл бұрын
“This fan is supposed to run at 3 Volts” “Let me just turn it up a bit” 45..46...47.......48
@jinxx_z51253 жыл бұрын
4.8 piss wipe
@glovepro12563 жыл бұрын
@@jinxx_z5125 wtf are you trying to say? Are you roasting me
@PorWik3 жыл бұрын
It maxed out at 20V lol
@glovepro12563 жыл бұрын
@@PorWik that’s not what matters
@Macam2macam3 жыл бұрын
........ kaboom...
@PacoOtis3 жыл бұрын
You might mention the fan draws less current as the vacuum is introduced as the drag on the blades is reduced. The same thing happens when one covers a vacuum cleaners nozzle and hears the motor speed up considerably though many think the fan is slowing. It is not!! Thanks for the video!
@xiaoshen1944 жыл бұрын
3:50 .... This is what happens when you give 5 assignments for 6 subjects each and ask them to complete it in a week.
@panagiotismerkouris89054 жыл бұрын
😂😂😂
@panagiotismerkouris89054 жыл бұрын
So true
@strangequark0074 жыл бұрын
😂😂😂
@beactivebehappy98944 жыл бұрын
And you go Super Saiyan
@andrieslouw65884 жыл бұрын
You must be an engineering student
@jacobellis81354 жыл бұрын
I wonder how much of that was being moved around just from static
@babajaiy82464 жыл бұрын
exactly
@indridcold84334 жыл бұрын
The beating of the blades against the particles made most of the movement, I think the static probably moved the particles more than the low pressure wind, but not more than the blades beating the particles.
@shokdj14 жыл бұрын
The word static literally means doesn’t move lol
@jacobellis81354 жыл бұрын
@@shokdj1 lol.. true.
@robotslug4 жыл бұрын
Entirely, lmao.
@anipodat3944 жыл бұрын
"Turbomolecular Pump" would be a cool band name.
@Ten24 жыл бұрын
Lil’ Turbomolecular Pump
@indridcold84334 жыл бұрын
@Red Nexican My exgirlfriend bought one. It is a sex toy. But she did not want it for her. She wanted to use it on me. When she came in the room looking like a human tripod, she said, "This is for you. It is to hurt you in the best way possible." She clicked the horrible looking elephant trunk wannabe, coated in a thick layer of KY, on and it made a horrible noise, like a car starter. It started to rithe and contort in an evil way. I flew up off the bed, threw on a towel, and ran out the door. I left my clothes, wallet, car, and my keys. I went to a payphone and called a taxi after a couple of miles of running. I never saw my keys, the clothes I was wearing, my wallet, my car, nor her again. No way I was going to risk that horrible Turbomolecular pump again. She could keep all the stuff Ieft. I changed my number and door locks. I had long hair and a goatee. I shaved and got a military crew cut. The woman terrified me after that. Sometimes, when I am sick and have a high fever, I have nightmares with her yelling at me as I am running away saying, "But I was going to put it in only an inch at a time! Come back!"
@MrMaxitaple4 жыл бұрын
@@indridcold8433 lol wtf
@dabunnyrabbit26204 жыл бұрын
or album name.
@dabunnyrabbit26204 жыл бұрын
@@indridcold8433 don't lie, you loved it. where did you find a "pay phone"
@ionhavoc23 жыл бұрын
Notice how your fan started pulling less and less amps when the air resistance went down?
@Henrix19983 жыл бұрын
That's the only meaningful result of this video
@Fadamor3 жыл бұрын
I think he noticed it too and moved his camera so you couldn't see the change in current draw. Why introduce things you don't want to distract the viewer with that takes away from your intended demonstration?
@ambassadorkees3 жыл бұрын
@@Fadamor For me, the voltage/amp number tells most. Put on a graph with a rpm count it would tell the effectiveness of the motor, the engine mechanical vs electrical loss, the real effort going out etc.
@PauloNevesPortugal3 жыл бұрын
The current drops because the back emf increases making the actual voltage in the windings tend to 0. Without the air friction there is actually not much force the motor needs to do and so it just increases speed therotically up to the equilibrium of back emf (characteristics of the motor and speed) match the provided voltage. The inverse is that the current is maximum when the motor is stalled and doing only force with no speed and thus not having back emf. This means the motor has maximum force and current when not rotating. It is why electric cars have fantastic acceleration.
@Fadamor3 жыл бұрын
@@PauloNevesPortugal That was a really long paragraph to say, "The lack of parasitic drag in a vacuum requires less current to spin the fan at a given voltage."
@ZeD694203 жыл бұрын
no the balls started moving at the end due to the vibrations caused by the motor with that unbalanced fan and the box, the walls of the chamber are what caused the balls to bounce around. the walls transferred the vibrations from the motor to the balls. try this again with no static and no vibrations and you will get real results. You need less variables.
@joshbuchman38803 жыл бұрын
I was about to suggest that this could have been a factor, too.
@moviescenefailvideos73283 жыл бұрын
Agreed
@battleroyale17603 жыл бұрын
Wow but its just minor factor. Notice at 15V those balls at surface rotating along the direction of fan.
@DoyleFM3 жыл бұрын
You need "fewer" variables... 😁 🇺🇸
@anonymousmafia31974 жыл бұрын
What does a fan do in a vacuum chamber? It spins.
@xiaoshen1944 жыл бұрын
bj
@mr.waffentrager44004 жыл бұрын
The question is how fast ...
@gabor62594 жыл бұрын
If they're a fan of Papa Roach, they suffocate. _Suffocation, no breathing, don't give a f*** if I cut my arm bleeding._
@sexyyoda75674 жыл бұрын
Man why didn't I think of that
@igortretsnom4 жыл бұрын
I expected the fan to increase in speed due to lower air resistance.
@glompen4 жыл бұрын
Could you line the interior with a grounded "wire-mesh" and redo the experiment? Would like to see the results without static interfering...
@1943L4 жыл бұрын
Of course under vacuum some beads were simply bouncing off the walls and being thrown back by the blades, not air currents.
@GroovyVideo24 жыл бұрын
i think static electricity was making them move too
@tonyparker35064 жыл бұрын
Agreed. The increased magnetic field would affect anything with a static charge.
@rhuttrho884 жыл бұрын
Show off!!😀😂
@alandouglas27894 жыл бұрын
Henning Idsøe seriously? 😑 Are you stupid or something
@JAcobcz4 жыл бұрын
Another cool side effect of pumping air out of the chamber is , when you observe amperage on lab bench power supply - it is dropping due to less drag on fan itself. Nice experiment!
@statusquofugitive85544 жыл бұрын
When the camera moved I was thinking “no, no, go back I want to watch the amperage” lol
@ahmedejaz11254 жыл бұрын
It can also be because as there was no air to drain the heat from motor the wires got hot and resistance increased.
@LocoHosa4 жыл бұрын
@@ahmedejaz1125 That would have been an increase in amps due to higher resistance. What we saw was a reduction in amps because the fan was spinning more freely. =]
@ahmedejaz11254 жыл бұрын
@@LocoHosa no when resistance increases current decreases because I=V/R so I is inversely proportional to R if voltage is constant.
@owomaogbayibo4 жыл бұрын
@@ahmedejaz1125 Actually the Voltage was not constant. it changed from 3v to 17v so V=IR does not apply in this case.
@LNC4P3 жыл бұрын
What I found interesting, that isnt mentioned, the amperage is going down as the vacuum increases. This makes sense since as the pressure goes down, so does the lift and drag acted upon the spinning blades. This in turn reduces the amount of force needed to rotate the blades. Thus, less energy/electricity needed to spin the blades at a given voltage. Thanks for the vid!
@nemod33382 жыл бұрын
The same happens in a vacuum cleaner if you block the intake hose. The motor fan starts to spin faster as it has less air resistance (vacuum).
@TheFizzster3 жыл бұрын
The answer should be a resounding no. In a vacuum, the fan can't push/pull anything, as there is no medium to push them through. Any result that is different means you didn't control for some variable
@braelinmichelus3 жыл бұрын
That should be the case, yes. But only in a _complete_ vacuum, which this test was not conducted under. If you watched to the very end, he explained how the chamber was not in a _complete_ vacuum, meaning that some gas remained inside. That's why the fan had to run at a mucher higher speed in order to overcome the drag of the styrofoam beads, causing them to fly through the air. If this test was conducted in a _much greater_ vacuum, using a turbomolecular pump, the fan likely would not have been able to do anything, such as in your explanation. There are different levels of vacuum, and only a _complete_ vacuum has no gas whatsoever in it.
@micklbx91253 жыл бұрын
@Fizzle Hi , is there a medium in space ???
@racingmhf91573 жыл бұрын
Title: "What Does a Fan Do in a Vacuum Chamber?" Me: he runs out of air
@amogus73 жыл бұрын
and go FAT
@MassimoPugiDelta3 жыл бұрын
... and it'll spin for no purpose! 😅
@trevorbailey96113 жыл бұрын
The comment about the movie the "The Martian" was really misleading though. The atmosphere is so thin that it would NEVER actually tip or jeopardize a space craft. Even the worst of storm would barely wave a flag. The writer of "The Martian" even noted that he knew it didn't make and sense but it worked for a good story.
@TupDigital3 жыл бұрын
Right- THATS what is absurdly silly about the movie The Martian.
@phylthamendment3 жыл бұрын
So basically what your saying is rockets don't work in space! Rockets cannot propel themselves without any atmosphere to push off. Space travel is a lie
@oliverdawes9173 жыл бұрын
@@phylthamendment Laws of motion still apply. Rockets essentially throw fuel out that back, which means an equal and opposite force is applied, pushing the rocket forwards. You can try this with a skateboard or roller skates, throw something heavy in one direction and you will move in the opposite. No atmosphere required
@justinlabarge81783 жыл бұрын
@@phylthamendment the rockets push off the fuel they propel.
@jcpt9283 жыл бұрын
@@phylthamendment Well, this shows a complete ignorance of fundamental physics.
@flochartingham23333 жыл бұрын
Go all out on what static electricity would do in this situation. Take out all the humidity of the air by lining the bottom of the chamber with silica gel (under a permeable membrane), put in styrofoam balls and leave under vacuum overnight. Use something like brass for the fan blade material. Then rub a cat against the outside of the chamber. Then my life will be complete.
@MrOnlymoin13 жыл бұрын
'rub a cut' - comedic genius!
@isaackay58873 жыл бұрын
This comment deserves more likes
@airgliderz3 жыл бұрын
That laughable, if in a vacuum there is no humidity, or it is not a vacuum.
@dinozaurpickupline42213 жыл бұрын
yeah the cat would prolly jump on it
@teddy46993 жыл бұрын
@Todd Thompson My corona got healed after I did that, thanks.
@trstquint71143 жыл бұрын
'The Fan Has Hitten The Balls". Sounds like a new expression.
@AnnaVannieuwenhuyse3 жыл бұрын
Notice how the motor's current draw was dropping as the vacuum was created.
@ingoclever17223 жыл бұрын
the produced heat however cannot disapate quite as well.
@nara44203 жыл бұрын
I've seen that too, but at 2:05 he moved the camera-angle so we dindn't see what the current was at minimum pressure.
@Crazyarnold123 жыл бұрын
@Darth Wheazius exactly what I was about to say
@Jonnydeerhunter3 жыл бұрын
@Darth Wheazius That's what I was wondering too.
@Jonnydeerhunter3 жыл бұрын
@Darth Wheazius I feel it haha. Good luck if you get to test it. Should be interesting.
@TomsTechReviews4 жыл бұрын
This is 'fan'-tastic! I'm a fan now but please don't put me in a vacuum chamber, thanks.
@brando33424 жыл бұрын
Very punny
@OuterMaster4 жыл бұрын
Old McDonald had a farm E-I-E-I-O And on his farm he had a cow E-I-E-I-O With a 0:24 0:24 here And 0:24 0:24 there E-I-E-I-O
@DuncanBassBoost4 жыл бұрын
LOL
@rnsxnce4 жыл бұрын
Here a moo there a moo every where a moo moo
@incrediblezab4 жыл бұрын
You've made my day
@SSSPrince4 жыл бұрын
whoa
@user-we5zq6re9d4 жыл бұрын
This deserves an award for the most random thing someone has tought with a buzz sound
@leonmuller17023 жыл бұрын
Fun Fact: Andy Weir, the author of The Martian, stated himself, that one of the only nonscientific plots in his book were, that the atmosphere on mars would be too thin ,as that a windstorm could have overthown the startmodule. He put it in anyway because of no better explanation why the crew would had to abondon mars. ;)
@revenge122120123 жыл бұрын
Couldn't he have put in one of those planet wide dust storms that last for long periods of time? o: Just curious (: I'm sure he thought of a lot of possibilities, but I wonder if that crossed his mind too (:
@leonmuller17023 жыл бұрын
@@revenge12212012 I guess not. A long lasting sandstorm would be a problem because of lack of sunlight for the solar panels. At the other hand that would mean Mark Watney would have died after a few days, probably due to hypothermia.
@revenge122120123 жыл бұрын
@@leonmuller1702 that makes sense (: hmm, what if it were like an unforeseen dust storm (not planet wide) that only lasted for about a week and made the crew leave, leading to the main character's circumstances, do you think that'd be possible? o:
@leonmuller17023 жыл бұрын
@@revenge12212012 The problem is why they would leave Mark alone on mars. If dust were the problem, there wouldn´t be a need to rush and let a injured alone.
@leonmuller17023 жыл бұрын
@Lassi Kinnunen 81 If there was a landslide and one were buried they could just use his biomonitor which is sending signals to find him. A welding fraud on the one hand has tro be severe enough, that the crew couddn´t fix it, in which case the lonely astronaut couldn´t either, Or at the other hand it would be fixable like the accident with the pressure gate in the book. In either case there wouln´t be a reason to abondon mars and leave one crewmember alive and alone back there.
@georgegriffin61143 жыл бұрын
Using the metal of the outlet and meter as an electrical conductor is pretty inspired!
@tannermarlow51623 жыл бұрын
Inspired?
@robertt93423 жыл бұрын
On Mars, the wind would very little force on any of the equipment that was seen in the Martian. Basically it couldn't happen. Now. 4km/h wind on Venus would be pretty powerful.
@jrichardjacobs343 жыл бұрын
That's a good point if we only consider the rho of the gases. If we increase rho by adding in the dust being carried in the wind, it might be a bit different. I don't know of any experiments that have run with that in mind, but it's not hard to imagine dust moving along with the wind at 30mps will generate a substantial force.
@fexl01434 жыл бұрын
You are one of the most educational channel on youtube, your channel is great, keep up the great work!
@69cat4204 жыл бұрын
ROBUX
@igxniisan69964 жыл бұрын
3:52, *If we see carefully those beads were in vacuum and they were hitting each other and the chain reaction increases untill a time comes when every bead is moving even in vacuum, well that's what the ideal gas molecules do, the air pressure inside a jar exerted to the surface of its inner wall is due to the fully elastic collisions, which keeps them from collapsing into a single point... I know there's no connection with that thing to the beads here, but hey the beads were hitting each other and that hitting cause collisions among the beads themselves, thus constantly keeping the pressure and eventually taking the whole volume of the vacuum chamber inside, just like gas molecules... But here's a point! The collisions here are not at all elastic but they're constantly getting their kinetic energy from that spinning fan by hitting into its blades, that's kinda giant model of how the ideal gas molecules behave when they're inside a closed chamber, and how they keep their pressure...* _I know many guys will not even read till this much..._ 😂😂😂🤣🤣🤣🤣
@MaybeN0974 жыл бұрын
Thanks you explain better than my teacher
@Wol7474 жыл бұрын
I would surmise that it’s not the remaining air but the fact that at zero humidity the static on the beads makes them get attracted to the fan? As one goes through it pulls others in a cascading effect. Interesting to try with beads that don’t have that annoying property that makes polystyrene packaging stick to you when your Amazon delivery is opened!
@sunuae4 жыл бұрын
3:50 my man: *turns it to the max voltage fan: adios
@nobodynemoq3 жыл бұрын
I appreciate how you simply started the experiment without 20 minutes of introduction. Good job!
@KevinBalch-dt8ot3 жыл бұрын
The DRAG force increases with the square of velocity. While the drag coefficient does change with velocity, if drag coefficient increased with the square of velocity, drag force would increase with the fourth power of velocity which is not the case.
@DoyleFM3 жыл бұрын
"With many awful facts about the scary hippopotamus..." 🇺🇸
@millicentduke66523 жыл бұрын
Using your inlet and outlet valves to conduct electricity was freaking brilliant!
@Comrade_YG3 жыл бұрын
Yeah lol
@abdullahjaufer29384 жыл бұрын
4:00 Sir Nikola Tesla
@hoodrichyb53724 жыл бұрын
I domt get it explain pls
@abdullahjaufer29384 жыл бұрын
@@hoodrichyb5372 with a mustache and no beard he looks like the great scientist Nikola Tesla
@luriothelucario2504 жыл бұрын
This made me sound like a car engine reming up
@bylethdimitri70423 жыл бұрын
4:41 pretty much BLEWED his ship over. I'm a boy and all but you are absolutely adorable haha
@mrmped13 жыл бұрын
The motor was sitting on the bottom of the chamber, you most likely created a harmonic resonance which caused the foam balls to vibrate and get hit by the fan blades.
@RyanandSaraDelling4 жыл бұрын
KZfaq: do you want to watch a fan in a vacuum chamber? Me: How could I say no
@MrAliFranca4 жыл бұрын
Never thought about it but hey, I mean how can I say no?
@elijahcaudle90864 жыл бұрын
Fucking same mate
@palepicturesmedia72704 жыл бұрын
„It’s supposed to be around three volts, I think it got to 17“ lol
@magilviamax83464 жыл бұрын
RIP poor little motor ...
@dbeysoyt4 жыл бұрын
rip unbalanced fan blade, couldnt handle the increased rpm and eventually vibrated off the shaft.
@trilexi4 жыл бұрын
"Men don't cry ! " I cried when the fan broke
@amovifa45253 жыл бұрын
Small remark: the drag coefficient doesn't change with velocity squared. The dynamic pressure, and thus the drag, does. D =0.5Cd*S*rho*V^2
@ilikebeans38213 жыл бұрын
What
@ilikebeans38213 жыл бұрын
What is the equation. Way over my head mate
@amovifa45253 жыл бұрын
It's a result of Bernoulli's equation(dynamic pressure is 0.5*rho*V^2). For both equation, D is drag, the drag coefficient Cd, the surface area S, the air density rho and airspeed V.
@ilikebeans38213 жыл бұрын
@@amovifa4525 wow, lol. Thanks for sharing. God bless
@likefire16173 жыл бұрын
2+2=4
@Anthro0063 жыл бұрын
I wonder if some of that movement was created by the vibrations of the fan motor because of the seeming harmonic movement of the beads close to and around the motor instead of the wildly flying movement in all directions. 🤔
@moros_gamer28744 жыл бұрын
Just I wanted to say that the new KZfaq comments list is the Worst thing they did ever
@jacobshepherd39974 жыл бұрын
Agreed
@davidlegkodukh69694 жыл бұрын
Isn't it easier to reach now?
@lauriekimani4 жыл бұрын
Agreed
@moros_gamer28744 жыл бұрын
@@davidlegkodukh6969 No because I was accustomed to the old one, but maybe for you
@JonsTunes4 жыл бұрын
Yeah it sucks. They tried it before and the reverted back to the old format, now they've done it again.
@juuke844 жыл бұрын
Any plans to get the turbomolecular pump? I think you should own one :D
@YCbCr4 жыл бұрын
They are bloody expensive. That, and i'd rather not trust anything cheap when it comes to spinning at 300k RPMs. Maybe renting one for a short time for a miniseries would be a viable option.
@sexyyoda75674 жыл бұрын
What's that
@strangequark0074 жыл бұрын
Considering the one that he has and the lowest it can go.. It's damn good. And anyways he doesn't need to invest huge dollars on turbo-molecular pump 😅 For regular experiments his vaccum pump is great enough! 😁
@Powatodacarz14 жыл бұрын
He could also just build a mercury powered vacuum pump like CodysLab did. It creates a near perfect vacuum
@MarkHobbes4 жыл бұрын
Around 600 dollars
@ChrisPBacon-yz6nk4 жыл бұрын
I think you should have done another one and replaced the beads with streamers hanging from the top so there’s nothing to pick up and throw around in the chamber, only the effects of the remaining air molecules on the streamers.
@McHeisenburger3 жыл бұрын
Exactly what I expected would happen happened, and yet I’m still impressed.
@vinovais83 жыл бұрын
The way he passed the energy into the chamber is incredible
@nocturnal68633 жыл бұрын
I thought exactly the same thing after the split second it took to figure out why the alligator clips.
@zohaibazhar98253 жыл бұрын
In my opinion. He was unable to creat high vacuum close to absolute. Thats y at high RPM fan manage to lift the particles. Because there is still some air left.
@sodar423 жыл бұрын
I was wondering how quickly the fan would break because of no air cooling.
@FallLineJP3 жыл бұрын
Given that there is no air for the fan to push, there's really no load on the motor. This was my first thought as well, but I guess the only way it would overheat would be through friction.
@ambassadorkees3 жыл бұрын
@@FallLineJP At the end it looks like it dissipates 18V, 1,5A though it cannot be clearly seen. A whopping 24W compared to the nominal 660mW. Since also air cooling is lost, I'd say this test would end up in smoke when prolonged. But the less than a watt nominal consumption won't heat anything that big and heavy to destruction.
@terryfuldsgaming79953 жыл бұрын
@@FallLineJP the friction is created by the magnetic fields that turn the fan. Turn a motor by hand. They dont spin freely. They start and stop. That's from the fixed magnets. That will cause friction even in a vacuume from my understanding. Eg induction heating.
@TheRobojay3 жыл бұрын
@@FallLineJP Friction and the wires heating up because of the high current going through them.
@phxf3 жыл бұрын
The resistance inherant to the copper windings in the motor generate heat regardless of motor resistance. My guess is the heat build up warmed the output shaft so high that it started to transition the plastic blades towards a liquid, breaking the static friction holding the fan blade on the motor output shaft and allowing it to fly off. I’m pretty impressed that the motor seemed to survive that abuse.
@carwashadamcooper15383 жыл бұрын
The vibration causes movements. Static may also be affecting the results but the vibration is the active agent here.
@johndii21944 жыл бұрын
I like the way you transferred the electricity into the box to the motor.
@Abitibidoug3 жыл бұрын
Interesting video. As the air got thinner there would be less force from moving air if the fan were at constant speed. However, in thinner air the fan will go faster for the same applied voltage. That effect, combined with a higher applied voltage accounted for the fan being able to move the beads around even at such a low pressure. It would be interesting to know how fast that fan was turning just before the blade flew off.
@bernhardsagat774 жыл бұрын
Isn't there a fair degree of static charge being generated by the fan on the nearby beads causing the others to become charged in a cascade effect contributing to the motion?
@SirBoden4 жыл бұрын
Running the fan before pulling the vacuum built up quite a static charge around everything in that box. Should do the test without the buildup.
@vincentrobinette15074 жыл бұрын
If that theory is right, the beads might have circulated, even if he could pull the vacuum of deep space! It DOES sound plausible.
@Owen_loves_Butters2 жыл бұрын
There was probably a lot of static, but static can't cause motion like that, since there isn't a driving force to keep them circulating like they did, they would've just jumped around a lot.
@donm15474 жыл бұрын
Also, with a brushed motor being driven that hard, there are gasses being created by arcing, includine Ozone.
@isettech3 жыл бұрын
Ozone chemically takes 3 Oxygen Molecules and produces 2 Ozone molecules, so the generation of Ozone does not increase pressure. Good guess, but the chemistry math does not support the theory. It is more likely as possibilities, the lack of cooling increased the heat and the bearings, or windings broke down and released some of the magic smoke. When the motor was at very high speed, hitting the pellets, may have broken some of the cells of Styrofoam, liberating the trapped gas. With very little Oxygen present, I don't think that there was much Ozone at all. I would like to see a repeat of the experiment with a high vacuum gauge on the chamber to see the pressure rise when the snowglobe effect returned. I think that was due to a pressure rise. An electric arc from a plasma globe coil can provide the color of ionization to provide a spectrum of the gasses present. I suspect the gas would contain the gas used to form the foam beads.
@andreassheriff4 жыл бұрын
Was it the air that made the balls fly around, or was it the motor's vibration?
@Simon-ph1nf4 жыл бұрын
I think its the vibrations of the motor too as the balls stayed on the floor and only jumped when the vibrations where high enough to make them bounce
@mistersaur4 жыл бұрын
Static charges
@pauligrossinoz3 жыл бұрын
It was just the motor's vibrations being transferred to the floor of the chamber, then to the balls, making them jiggle more and more as the motor voltage increased. He over-drove that little 3V motor with far too much voltage, causing pretty severe vibrations on the chamber floor. The motor was stressed far beyond its 3V design limit. The tiny amount of air did virtually nothing.
@beingsentient3 жыл бұрын
In addition to the turbo molecular pump is the diffusion pump, which is commonly used to draw vacuums down to 10^-6 Torr, where a Torr is 1 mm Hg or 1/760 Atm or 133 Pa. The diffusion pump works by creating a stream of oil vapor that pushes the molecules of air from the vacuum chamber away from the vacuum chamber and those air molecules are replaced by more molecules from the vacuum chamber via diffusion from the vacuum chamber to the oil vapor.
@alexandrep.peixoto88363 жыл бұрын
Two observations: 1 - It is very interesting to see the motor current decreasing with the increase of the vacuum rising due to the decrease of the load on the motor. 2 - It is very likely that the pieces of Styrofoam are jumping in the vacuum due to vibration of the motor at the bottom of the vacuum chamber. The sound propagating in the camera is the main support of this thesis. When the propeller detaches, the sound disappears. This propeller is probably unbalanced and caused high RPM vibration.
@ollieb814 жыл бұрын
1:07 “WILL YOU START THE FANS PLEASE!”
@janami-dharmam3 жыл бұрын
The motor with the fan was vibrating and causing the beads to fly around. Some were hitting the blades and it appeared that they are actually flying. You need to hang the fan and repeat the same experiment.
@randal_gibbons3 жыл бұрын
I saw the title and I thought, "wow! he doesn't like his fans very much."
@saikrithiks28703 жыл бұрын
😂 I see what you did there
@watzittuya12793 жыл бұрын
This comment is very underrated
@saikrithiks28703 жыл бұрын
I'm the hundreth like, now 😎
@erelando3 жыл бұрын
Am I a cheap fan? :(
@DTMPROD.3 жыл бұрын
@elgur joke???
@Pretagonist4 жыл бұрын
Mars has winds, but not spaceship tilting wind. Also I'm amazed the motor didn't burn itself out when it no longer had air to cool itself.
@akdefense4 жыл бұрын
Cool. You could also slice up a dryer sheet into tiny pieces (about a quarter sheet) and throw it into the box. It would remove all the static. My kids had a dyson toy vacuum with tiny foam balls. Worked like a charm.
@UrsusPolaris013 жыл бұрын
Seems the vibrations caused by the ventilator moves the beads too.
@beactivebehappy98944 жыл бұрын
3:49 it went from normal to Super Saiyan
@tman59264 жыл бұрын
This is the first time I've ever seen you with a mustache!
@hagerty19523 жыл бұрын
You actually had a crude turbo pump there with that fan spinning. If you could have gotten up to, say 30,000 RPM (and provided a passage out) you would have kept pumping. You don't really need a turbo pump, though. You could do this experiment with a diffusion pump and get low enough to stop all bead motion due to air drag. I've worked in HiVac for decades, and I'm surprised that motor continued to run. Motors overheat very quickly in a vacuum without air to cool them, plus, if that's a brush-type motor, the carbon starts oxidizing with the little air still in there, stopping any current flow.
@justindarkcloud3 жыл бұрын
Would a sprengle pump work?
@AZBADBOYz3 жыл бұрын
Visually helped my understand the Mars drone making video.
@animefreekafi3 жыл бұрын
"drag on those balls" *Subscribed*
@PeterWMeek3 жыл бұрын
Those balls must have been open-cell foam; if they were closed-cell foam, they would have swollen up under vacuum. (Interesting experiment maybe for a guy with a transparent vacuum chamber.)
@CommonSenseFishing2094 жыл бұрын
Technically the windings in the motor should fry out in a vacuum.
@DancePartyAttack4 жыл бұрын
Why
@beezertwelvewashingbeard87034 жыл бұрын
@@DancePartyAttack There's no air to draw away the heat generated by the motor.
@megunded4 жыл бұрын
hm ....there is less load on the motor due to no drag on the fan , so i was asking for the amperage drop of the motor once he starts evacuating the chamber . but .....it has still the abilty to heatsink into the motor and radiate the heat away in the ir spektrum ....i would suggest that the heat is less a problem from a electric field in the motor than from the friction of the bearings over time , because the grease would evaporate in an atmosphere lower than 20 mbar if it is not a special vacuum rated grease . and second point is that under vacuum conditions ( or was it a combination of vacuum and low gravity ? not sure about this now ) that soldering tin is tending to grow some kind of spikes ( on small circuit boards ) and can create shortcuts on its own ?
@boomstick40543 жыл бұрын
Beezer Twelve Washingbeard ...And the Most Scientific Comment Award goes to--
@SpyAlelo4 жыл бұрын
I don't know if this was mentioned by anyone in the comments, but it is very interesting (and also makes sense) how the current draw from the motor was dropping as the air was being vacuumed out of the chamber. This is due to the air density being less over time, meaning that the propeller had less air mass to move thus decreasing the motor load. I'd be interested on what the final number of current draw was at 3 volts when the chamber was at near total vacuum.
@MarcosKazan4 жыл бұрын
Current was dropping with the pressure, since there was no drag to suck energy. Nice to watch it, thanks!
@itwasinthispositionerinoag74144 жыл бұрын
Thanks for this, I'm taking a short trip to the Sun next week and now know not to pack my handheld fan
@kdvr7664 жыл бұрын
Dont forget to go at night so its not that hot when you reach the sun🤣🤣
@Ncsabi4 жыл бұрын
No one mentioned the power consumption. When he was sucking air out, the fan got less resistance from the air and you can see the power consumption lowering.
@ahmedejaz11254 жыл бұрын
It can also be because as there was no air to drain the heat from motor the wires got hot and resistance increased.
@Ncsabi4 жыл бұрын
@@ahmedejaz1125 good point, in this case i think both played a role.
@Knoxvillemoto3 жыл бұрын
How hot was that fan without any air to convectively heat transfer to.
@KonstantinOrekhov3 жыл бұрын
Next step is eliminate other effects. 1. Bigger volume of chamber 2. Metal fan 3. Springs under fan to fix vibration fluctuation on bottom 4. Change position of fan: top mount, side mount, bottom mount. 5. Pendulum swing arm motor fixed to show drag. Physics is not just a toy dude. Physics is about serious scientific methods involved in any experiment, even simple as F.
@waifoo694 жыл бұрын
4:17-4:19 😂 man. Okay back to the topic
@fortifieddarkness53944 жыл бұрын
Thought I was the only one who noticed lol
@ezrimata45404 жыл бұрын
Would’ve been a little better if he had the fan facing the other way
@mr.waffentrager44004 жыл бұрын
Also if he measured rpm in air and in vacuum
@jaystarr65714 жыл бұрын
Ha Ha Ha..
@ozzymandius6664 жыл бұрын
I wanna see one of those ionic wind levitators in the vacuum chamber.
@iamdave844 жыл бұрын
@@mr.waffentrager4400 I agree, I wanted to see how the fans speed increases as the air is pumped out and it has less and less air to push it of its way
@user-wq1nm4lc7q4 жыл бұрын
Inverse thinking.
@RenoLaringo4 жыл бұрын
That was no vacuum, plus there remains lots of air in the styrofoam beads as well...hence the result.
@BRUXXUS4 жыл бұрын
This is what I was thinking too. They’re full of air, and as the vacuum got stronger they outgassed causing all sorts of crazy interactions with the fan, static, pressure, and other beads.
@isettech3 жыл бұрын
@@BRUXXUS Outgassing very likely increased when the motor speeds began to resemble a blender at the end.
@anotherplottwist3 жыл бұрын
Did any vibration coming off of the motor or the base possibly cause any of the balls to start vibrating?
@Hessijames793 жыл бұрын
I like how you eliminated the need to drill through the chamber for the motor cable.
@yashshukla95904 жыл бұрын
Enjoyed it....... Loved it..... Now I know why wind 🌬blows in vaccum... Cuse it's not a perfect vacuum... Keep making such kind of videos
@jasonwilde1973 жыл бұрын
You said yourself it wasn't "a perfect vacuum".
@nebtheweb88853 жыл бұрын
In reality, there is no such thing. A Vacuum is never zero. There are always some molecules. NDT explains here. kzfaq.info/get/bejne/osmJg69k2Jixnas.html
@aerophage3 жыл бұрын
I think the most surprising part is that the fan motor didn't overheat without any air to conduct away the heat
@robertkorn3 жыл бұрын
That's a pretty small fan and in a vacuum there is very little load on the motor.
@Al-rg8lx4 жыл бұрын
The background music sound like your in the middle of a gta 5 mission 😂
@PaoloFanali3 жыл бұрын
I agree with many of the comments. Electrostatic effects increased parallel to the fan speed. Other factors were also at play.
@blackjack62593 жыл бұрын
We use TMP’s at work for checking for leaks in air bag inflators after they are assembled and charged with argon and helium. I’m surprised the motor didn’t burn up due to the high voltage, relatively speaking, and lack of air flow to cool it.
@birgirkarl4 жыл бұрын
These are absolutely NOT weird results. The beads gained a static charge and the motor had increasing magnetic forces that attracted the charged beads to its rotor, eventually propelling them until they began to bounce each other more and more with increase in voltage. Ps. Mars has an atmosphere, it's just not oxygenated.
@MrGrumblier4 жыл бұрын
The atmosphere on Mars is also extremely thin and less than 1% of Earth's. It would have taken winds blowing several thousand kph to have the effect shown on "The Martian". The highest wind speeds recorded on Mars are around 160 kph which would be just enough to lift a flag.
@dirtrider884 жыл бұрын
the dude who made this video isnt the smartest
@rickhale43484 жыл бұрын
I was expecting to see the motor melt. Heat produced by the motor has no atmosphere for cooling. A motor rated at 3 volts driven by 17 volts, probably fried the motor. The only reason I watched this was for the weird results. There were none.
@davidj38414 жыл бұрын
Also mars has a really really thin atmosphere. The strongest winds there are extremely fucking mild
@OMGSOMANYSURVEYS4 жыл бұрын
Magnetic forces only exert a force on *moving* charged particles so your hypothesis doesn't work.
@elijahsapp214 жыл бұрын
Nobody: Literally Nobody: My ps4: When i turn it on 3:40
@rajkamal.achanta3 жыл бұрын
4:17 "you can get enough drag on ThOoSe BaLLs"
@milesstripling3733 жыл бұрын
I was baffled how nobody else caught that until I read this
@NC_Isro_642 жыл бұрын
Reported
@SantanuProductions3 жыл бұрын
It is not just static. In a vacuum with no friction, the beads do similar to Brownian motion just like molecules. The slightest energy they get from static, vibration and collision with the fan keeps transmitting to each other among the beads with very little loss of enegry.
@Shadow__1333 жыл бұрын
Who would have thought that a fan wouldn't work without air? Nobel prize worthy! 🤔
@DerickMasai3 жыл бұрын
1:05 is where the video starts if you just came to see the results
@joshuanicolai47763 жыл бұрын
I bet the fan sped up as there was less and less air resisting the spin
@triop_king68153 жыл бұрын
Good observation
@kodakincade80633 жыл бұрын
You should definitely have more than 2.69M subs. I’ve learned quite a bit and you always make your videos extremely understandable for the people that aren’t as proficient on the subject you’re covering.
@olafberend88373 жыл бұрын
Mousetrap chain reaction effect. Vibration of rotor excited a ball to jump into the rotor, hitting it and bouncing other objects towards the rotor... anti static and movement of the last molecules aren’t the most likely cause of what we’ve seen...
@donhastings35203 жыл бұрын
Soooo people actually asked if a fan would blow things around with no air????????
@lorenzhartl84663 жыл бұрын
Same thought
@enes32084 жыл бұрын
I thought the motor was gonna stop working because of the excessive heat that was building up.
@averyalexander23034 жыл бұрын
I thought the same thing, he was pushing it pretty hard and there was no airflow to cool it. I think the only reason it didn't is because there was very little load on it with that little air to create drag.
@jimmysyar8894 жыл бұрын
Muhammed Enes Camur same I’m surprised
@barnabywilde31014 жыл бұрын
i'm speculating: the fan with no load (air being pushed) is somewhat similar to putting a car engine in neutral and stepping harder & harder on the gas pedal. sooner or later, something in that engine is going to give
@ShaiBennathan3 жыл бұрын
I'm pretty sure the beads were moved by the motor's vibrations rocking the chamber floor (which also causes the sound), almost nothing to do with the remaining air.
@brettd58843 жыл бұрын
You missed a significant clue. At atmospheric pressure, the motor was drawing 240mA at 3V (1:11). At low pressure (can't read the gage), the current had dropped to 130mA (2:09). This would be due to the motor running faster (less air drag allows the motor to run faster > generating greater back EMF > which reduces current). I would have liked to see the current at 2:50. The motor temperature was probably also going through the roof (less air > less cooling). The references to "The Martian" when the storm blowing over the rocket refer to a plot device needed to get the story going. In reality, the forces on the rocket would have been minuscule. Still, an interesting experiment.
@RA75AK3 жыл бұрын
0:22 "I actually have my fan on here and I can adjust the speed of it.." Fan: *MOOOO*
@goldcountryruss70353 жыл бұрын
Motor has no cooling under deep vacuum & will burn up if run very long.
@ernestsmith35813 жыл бұрын
Then radiometers would not turn. There will be some black body radiational cooling.
@sirsanti84083 жыл бұрын
@@ernestsmith3581 radiation is a really shit way of cooling
@adamrezabek94693 жыл бұрын
@@sirsanti8408 i mean, rocket notor need hell lot of cooling, and in space, it is only coooed by vacuum