The Self-Levitating Kingsbury Aerodynamic Bearing

The first 100 people to go to blinkist.com/stevemould will get unlimited access for 1 week to try it out. You'll also get 25% off if you want full membership.
Hydrodynamic bearings are really cool! The Kingsbury aerodynamic bearing is a brilliant example as is an ordinary glass syringe.
A huge thank you to Tom Lipton for making the bearing. Watch his making video here:
• Kingsbury Michell Aero...
Here's the Sixty Symbols video about gauge block wringing:
• Gauge Blocks (Van der ...
I also found Cody's Lab did some investigation too:
• Will Gauge Blocks Stic...
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[@SteveMould]

Today I Learned From The Comments Section: I was wrong about how ice skating works (common misconception). Thanks for the correction @W410p. Here's an explainer: kzbin.info/www/bejne/r5u2l2qPnZ6IkMU The sponsor is Blinkist: The first 100 people to go to blinkist.com/stevemould will get unlimited access for 1 week to try it out. You'll also get 25% off if you want full membership.

[@s.d8756]

Also the card head that was turned up faced the camera. You got it perfect.

[@sleeptyper]

Have you ever followed a lorry/articulated/semi at dark and when it's -20C or lower? Their hot tires melt a visible track on the icy road and you can see it refreeze on your headlight spot (if you're crazy enough to drive close to the rear end). That track is slippery as heck, being fresly frozen ice. Now we know why (re. the explanation video). Offsetting your own tracks onto the older ice gives more grip, because it has had time to collect water vapours and become microstructurally more chaotic, resembling Ice Spikes biome from Minecraft.

[@Finndu]

regarding viscocity smartereveryday has a good video about it with ifferent inks in a really viscose liquid where you cvn spin it in one directerion and spin it back and you get nearly the same pattern.

[@welshsteve2009]

I watched the video from ‘It’s okay to be smart’ and appreciate the phase diagram for water. But this brings me to an interesting question: In the video, the phase diagram for water demonstrates that with increasing pressure ice changes to liquid water but in Thoughty2’s video he explains that due to the enormous gravitational force on planet Gliese 436b any liquid water is compressed into solid form (ice). Did I miss something? Does the state change again at even higher pressures? See the third planet, Gliese 436b at 2min 40sec in this video: kzbin.info/www/bejne/bHy9Yp6sfrp5qLc

[@Anzallos]

@@welshsteve2009 I believe that it is because, normally, increasing pressure transitions things from gas to liquid to solid because the molecules get forced closer together. Water, however, is weird in that it expands when it freezes and becomes a solid (see how drinks explode if you leave them in the freezer too long). Therefore, increasing pressure on ice at temps we normally deal with causes a transition back to the liquid form, but increasing further forces the molecules back together into a solid. See en.wikipedia.org/wiki/Phase_diagram#/media/File:Phase_diagram_of_water_simplified.svg

[@DavidKutzler]

Anesthesiologists use a glass syringe when placing an epidural for regional anesthesia. The anesthetic for an epidural needs to go into a very specific space near the spinal cord called the epidural space. The anesthesiologist advances a needle into the back with a glass syringe on the needle. Each time that the needle is advanced, the anesthesiologist lightly presses on the plunger and releases it. Because of the low friction in the glass syringe the plunger readily springs back if the needle tip is not in the epidural space. As soon as the needle reaches the epidural space, the plunger goes all the way in with no spring-back. A plastic syringe doesn't work for this, because it has too much friction to respond the same way.

[@charlieangkor8649]

So if the needle accidentally clogs, the anesthesiologist will poke the needle all the way into your spinal cord and you end up on a wheelchair?

[@DavidKutzler]

@@charlieangkor8649 They use a special needle called a Tuohy needle that is designed to avoid "coring" that might obstruct the lumen of the needle. en.wikipedia.org/wiki/Tuohy_needle

[@AttilaAsztalos]

@@DavidKutzler I just love it when doctors use things like "perioperative morbidity" as an euphemism for "hey shit happens but frankly I just couldn't be bothered and after all it's just you dying not me so that's a sacrifice I'm willing to make".

[@DavidKutzler]

@@AttilaAsztalos I reread my comments and didn't use the term "perioperative morbidity" in either my comments. In fact, I deliberately avoided using medical jargon because it can be off-putting to a non-medical audience. I was merely illustrating a specific medical procedure that demonstrates a practical application of this interesting phenomenon. Perhaps you're not attacking me personally, but have a more generic complaint about healthcare providers.

[@bend1483]

@@DavidKutzler “perioperative morbidity” is mentioned in the wiki page you linked to, which I suspect is what Attila is on about.

[@dvig3261]

Years ago, i worked in a potato chip factory. There was a single machine that peeled the potatoes by tumbling them over a series of shafts which were surfaced with brush bristles. The bearings that supported those brush shafts needed a lot of maintenance and we were using food grade grease to lubricate them. The grease would get washed away by the water, abrasive potato rind and inevitable amount of dirt that was present. I made the suggestion that we adapt the bushing type support bearing by injecting water into them. This virtually ended the maintenance cycle since there was no longer any contact and the water flowing through kept the new bearings clean.

[@GoExperimental]

Amazing video. Very well explained. I had no idea there are glass syringes! Crazy.

[@Surestick88]

Right?

[@taiiat0]

i'm surprised you hadn't seen hem before, but our life experiences are all different.

[@johnptc]

They were always glass until plastic was invented

[@tomhsia4354]

@@johnptc Methinks glass syringes feel much nicer than plastic ones. So smooth, especially with liquids in them. My grandfather was a surgeon and he has some interesting things hidden at his place. I once dug out a glass syringe, played with them, and went: "Wow, these are so unbelievably smooth! Why aren't all syringes glass?"

[@grimfpv292]

@EFFram YOUng Cool!

[@JCBeastie]

There was a very interesting CPU cooler concept out a few years back called the Sandia Cooler, which used this air-bearing principle. They thought the barrier was thin enough to still be thermally conductive and you could spin a plate that acted like a heatsink and a fan in one piece, at low friction. Cool idea, and Thermaltake tried it out with their Engine 17 and 27 coolers. But they weren't as effective as hoped.

[@Peter-pu7bo]

"I wish I had an air compressor *pause* I think I'm gonna buy an air compressor" I feel you.... I feel you

[@sillyface6950]

have you got one

[@Peter-pu7bo]

@@sillyface6950 unfortunately not, I don't really need one, so I won't buy one. But having one, would still be neat...

[@geoptus]

For some strange reason, I feel the same about a tig/mig welder...I've never welded : |

[@Peter-pu7bo]

@@geoptus yes I want one like this too. They are just so precise. Also a CNC mill would be great...

[@Gwirmusic]

My wish for Xmas would be an SPMT like the ones SpaceX use at Boca Chica I'm waiting for Lidl to sell their own underpriced model 😊

[@blizzy78]

Steve Mould saying BOIOIOINGGG for 10 hours straight.

[@joshritchey3690]

instead of asking for "like and subscribe", this.

[@sofalessskid3354]

Yes.

[@mihailstolz]

Yes please

[@MrDigit420]

Can someone make a video of that

[@StellarLimpkin]

YESSSSS

[@RFC-3514]

1:58 - Glass is actually extremely elastic. Elasticity is the ability of a material to recover its shape when a force causing a deformation stops acting on it. It's not particularly _flexible_ (i.e., it breaks easily) but it is very _elastic_ (i.e., when it doesn't break, it recovers its shape perfectly).

[@Qingeaton]

As a kid back in the 60's I stood outside a giant, (what I think would be called plate glass) bank window where my Dad worked and watched it flex with the changes in air pressure between open doors and closed. It also had one of the classic cone shaped divots created by a small projectile, such as a bb gun. I thought it was manufactured into it back then.

[@RFC-3514]

@@Qingeaton - I remember a friend (well, acquaintance) of mine tripping and slamming his head into one of those. It flexed out, then in, then seemed to freeze for a second, and then shattered into a million pieces, like something out of a comedy sketch (or an action film where the guy with the "shatter glass" button was distracted). I don't think it was the impact itself, it probably just moved the glass enough to cause a crack to propagate from one of the edges.

[@donovanreid427]

Melt it???

[@Rm-mz5cn]

Ever seen a car with extreme bass and how the windows vibrate so hard it curbs

[@RFC-3514]

@@Rm-mz5cn - Car windows are generally not made of solid glass, they use "safety glass", which is laminated with plastic.

[@Luke10.25-gospelJesustaught]

I am seriously impressed with the professionalism of this channel. The manner in which Steve presents scientific material without losing my interest is applaudable. It is as if he has taken several bite-sized appetizer clips and cleverly combined and edited them into a full course meal in a very satisfying way. The sweet spot is between being oversaturated with information and being deprived of details pertinent to grasp the context. That sweet spot of captivation is where this channel lives and why I subscribed. I think this is my new favorite channel

[@jmunt]

Gauge block wringing absolutely blew my mind, I can't believe I've never heard of that before

[@nolanpalmer5181]

Look up the phenomenon "cold welding." I think it's a similar concept.

[@Eagle3302PL]

Look into cold welding, fascinating stuff. kzbin.info/www/bejne/j2PRgmufqMtoa9U

[@pbrstreetgang2489]

Also, the total length of gauge blocks that are wrung together is less than the length of each block added together...

[@evilferris]

You can experiment with this yourself by purchasing polished salt crystals used for infrared spectroscopy. They are clear round discs made from a single LARGE salt crystal so they’re kind of expensive. You can polish them to be extremely flat and smooth and push them together until you can no longer pull them apart. Two discs essentially become one solid crystal.

[@BlueNEXUSGaming]

@@evilferris That's also Tectonics and Sediment at work, so you're not only going into Geology, but Geo-Engineering with that example.

[@oxtoolco]

Hey Steve. Great video! So what's next? Cheers, Tom

[@Zaniahiononzenbei]

I've always loved your videos and sense of humor, thanks for all the great times! You really demystified a lot of high precision tools and metrology for me.

[@Zaniahiononzenbei]

Did you make use of hard drive disks while making these? It seems like a nice place to start with all that flatness.

[@J_CtheEngineer]

I didn’t know I needed a collab between you and Steve. Thank you guys for making this happen.

[@lifeteen2]

Careful, Tom, that's how you end up rebuilding LIGO from scratch. This is an excellent collaboration, looking forward to more.

[@TheKnacklersWorkshop]

Hi Tom, Are you checking I came over to watch Steve's video? Take care Paul,,

[@osirismother]

this is really good. Steve has really found his style of presenting. I love the honesty in his interest and his reaction to things.

[@christophersarandou856]

I really love when great KZbin minds I've come to enjoy collaborate. The science of why on one end and the functional how to on the other. Great job as usual. 👍

[@hugoiwata]

At 3:30 it was a not very subtle advertising for your brother's company: Injection Mould Industry

[@Mrfoobaer]

Yeah, and they sell glass syringes ;)

[@paulmaydaynight9925]

@@Mrfoobaer he can advertise anyone he wants,its his channel, but the real question is did his brother (wave) actually Injection Mould the glass syringes ^_~

[@rjwaters3]

@@paulmaydaynight9925 r/woosh Steve Mould, Injection Mould Industry.

[@CumbersomeCucumber]

his brothers name is injection?

[@KaitharVideo]

So, if he branches out into casting materials produced by bacteria, would that be Injection Mould Mould Industry? I guess the next thing would be to cast the spokesperson's hand with the technique, to mould injection mould Injection Mould Mould Industry's Mould in Injection Mould Mould Industry's injection mould mould. Seems like a clear plan to me.

[@hasansawan4970]

6:31 considering the device as a capacitor (two conductors and an insulator between them) It would be interesting to measure the capacity .. which in somehow represents the distance. then see for example if the spinning speed could affect the distance maybe?

[@SteveMould]

Oh yeah, I bet I could measure the capacitance of it as it spins. Good idea.

[@sigurdvanhauen6118]

Maybe even calculate and plot as a function of RPM? Hmmm....

[@hasansawan4970]

​@@sigurdvanhauen6118 @Steve Mould yes exactly , I'd love to see that curve. A real-time capacitive measurement mechanism is needed though, I'd suggest a 555 circuit (astable mode) to generate a frequency based on the capacity if adjusted so the frequency in the audible range .. it will be more fun to spin :D

[@hetsmiecht1029]

@@hasansawan4970 now I want that

[@tcoiler]

It would be interesting to use a battery that supplies more current to see if the frequency of the octo-continuity meter flashes are a function of the components charging or just due to the occasional contact.

[@zachaliles]

I've watched Tom Lipton for years now and it never ceases to amaze me just how skilled he really is. He's what I would consider to be a master of his craft, but he's too humble to admit it. And that happens to be another reason I like watching his content. You know he's extremely skilled and knowledgeable but he's in no way pretentious about it.

[@sikhswim]

Dude we don’t know why those blocks stick together? That deserves its own video. Loving the content- I literally now understand how a fluid bearing works, I think

[@rxsyete]

When there is absolutely no air between those perfectly flat blocks, that area is in near vacuum and therefore near 0-psi. So 14.7psi atmospheric pressure will push them together at opposite ends making them appear to 'stick' together just as how a rubber suction cup 'sticks' to smooth surfaces like glass. ☺

[@Tasarran]

@@rxsyete Isn't there a certain amount of Van Der Waals force involved? The same effect geckos use to stick to walls?

[@rxsyete]

@@Tasarran I don't think so because above just works on differential pressure (not molecular attraction) just as airplanes fly because pressure below the wing is greater than above it creating lift. Similar to suction cups being pushed against the wall by the psid (differential) of atm press and the vacuum on the other side of the cup. ☺

[@ABaumstumpf]

Kinda similar to the effects HDDs (the spinning hard-drives that store data) use for the read/write-head. It is hovering on extremely thin gas-layers.

[@justpaulo]

en.wikipedia.org/wiki/Flying_height#:~:text=The%20flying%20height%20or%20floating,between%20the%20head%20and%20disk.

[@Gunbudder]

And the term "computer crashing" comes from when HDD heads would literally crash into the platter, going through the gas layer. It used to be much easier for heads to crash.

[@avocares]

I honestly surprised he did not mention hard drives in the video. Fun fact, the reason very large capacity HDD's are filled with helium is because it allows for a smaller distance between the heads and the spinning platter (helium makes a smaller bearing compared to air), making the heads more accurate and allowing the reduction of both the track size and the distance between tracks.

[@xxportalxx.]

@@Gunbudder when st invented the first mems accelerometers they actually marketed it at first to hdd manufacturers, the idea being if it sensed a high acceleration it would brake the hdd so that it wouldn't crash, but the idea never got off the ground. In the end they found their first market in appt washing machines that were too small to have concrete counter weights, so instead ge used st's accelerometers to use the motor itself to counter the vibration.

[@xxportalxx.]

@UCo_UlZhV88T7DezHJXWj1Vg right but the head itself is riding on an air cushion, thats why high-speed drives use helium instead of air.

[@indian_oak]

Amazing!!! I have had a jab from one of those glass syringes in my toddler days. But I never knew that the same glass syringe spins. You are amazing. Keep going on with such inspiring videos.

[@EdgewiseChairman32]

I work in the injection molding industry, and am stoked to see you mention this. Thanks

[@fishecod2552]

actually ice does not melt into water when an ice skater goes over it. the pressure required to change the ice into water is way more than what an ice skater can make. the top of the ice is slippery because the water molecules on top have fewer bonds to other molecules compared to the molecules deep in, and start to show fluid like attributes even in a solid state. here is a vid by it's ok to be smart going into more detail kzbin.info/www/bejne/r5u2l2qPnZ6IkMU

[@ewilliams112]

I was going to post this but I'm glad you did

[@scheimong]

Yeah I remember too that this myth was debunked somewhere.

[@richardhee]

Did see that video too and was planning to comment it as well, guess Steve Mould has to excuse hiself for this now. Otherwise a nice video Steve thumbs up.

[@nerhu59]

@@scheimong Actually, it has been explaind (»debunked«) much more before the Video on KZbin. Even this article from 2005 explains the reduced chemical bonds on surface of ice, from further researches made even as early as 1978. »Using proton backscattering, researchers in 1978 found surface vibrations of the oxygen atoms roughly 3.3 times the amplitude of their value in the bulk...« physicstoday.scitation.org/doi/10.1063/1.2169444

[@xponen]

I think Richard Feynman propagate this myth, he mentioned that thing in his video "Fun To Imagine".

[@x0urce942]

Tom Lipton and Steve Mould collaborating....what a time to be alive :D

[@manzoorathar11]

2 minute paper with... I can't spell the name.

[@cezarcatalin1406]

Can you drink Tom too ?

[@soup-flavored-soup6613]

Isn’t that the guy who made the tea

[@ezanchi5422]

@@manzoorathar11 I always say Carol Johnar Fahir... Although I know it's wrong 😅

[@manzoorathar11]

@@ezanchi5422 😂😂

[@cjjoyce27]

It's wonderful how you so often cover topics I've just learned about or am currently using in my job. It's great hearing a well spoken explanation that doesn't rely on throwing math at the learner! This is how physics should be taught.

[@terrijuanette486]

....with the math coming after the explanation? That would be OK but physics is math. Plus, physics is supposed to teach the learner how to think critically, scientifically - learning to ask questions, valid or not, in order to find the answers. Math helps the learner ask questions, learn logic, and find answers....but not the so-called stupid math that is taught in many schools today. That just seems to be there to waste time and confuse the student so that the student never really learns the magic of math. I can see no other reason for the ridiculousness that is the 'new' stuff. What would happen if we taught people how to how to drive using that methodology? What if we used that methodology to teach people how to use their cell phones. That would be funny.

[@MrTaylorfenoglio]

I use to work for catapilar where we made metal seals for large equipment. We rotated the metal rings on a large table with a slurry mix with a gritty oil. It created a perfect seal similar to what you were showing. When you picked up the rings they would stick together like your blocks shown all the time.

[@ktvx.94]

I love how you can make amusing science content from the simplest, most mundane everyday objects. I wonder how you come up with these ideas, whether you scratch your head and do research or just look around your room and say "hey I can make a video about this random object"

[@king4aday4aday]

One of the practical applications is car crankshaft main bearings with engine oil providing the hydrodynamic lifting force.

[@Horstroad]

Another one would be the air cycle machines of the pneumatic air conditioning kits of aircraft. They actually use air as the fluid. An inexperienced mechanic might think the bearings are bust because you wont be able to spin the rotors by hand.

[@caleb8495]

This is much more common in aircraft engines. They are called babbitt bearings.

[@caleb8495]

@Muckin 4on OK then thanks. I have just encountered this in the course of my pilot training. During startup if the oil pressure does not get up to par within 30 sec (generally, depends on the plane) you shut it down. I gave my explanation bc of the more critical nature that pressure berrings have on aircraft. Thanks again, all the best. Take luck

[@GiffysChannel]

This was very interesting. I absolutely love this stuff and Thank you so much for introducing me to Tom Lipton's channel.

[@wlogue]

Thank you Sir, I found you from Mr. Lipton. I've been subbed to him for several years, Cheers from the U.S.A.

[@andrebartels1690]

The good old VCR created an air cushion between the reading head and the tape. The rotating head has spiral grooves which transport the air under the tape.

[@KevinReinartz]

Probably one of the most common hydrodynamic bearings are the ones In internal combustion engines, such as the crank and rod bearings. Hence why the viscosity and quality of oil is important.

[@timehunter9467]

Also Turbochargers, they spin so fast they wouldn’t be able to use any other bearing I think.

[@KevinReinartz]

@@timehunter9467 Fome turbos use ball bearings, which allow the turbo to spool faster. But the journal bearing would be a hydrodynamic bearings. Here is a good video explaining the difference of you are interested m.kzbin.info/www/bejne/nmm5m3psnJJrmtk&ab_channel=PrecisionTurbo%26Engine

[@timehunter9467]

@@KevinReinartz I took one apart that looked like journal bearings but no holes to fill them, only a gap in the middle which was why I thought it was the same. Nice video btw.

[@anonymous-tn6ij]

Except why is the syringe hydrodynamic but it only has air in it isn’t that pneumatic dynamic

[@ag135i]

I have to rewind several times to understand the concepts clearly KZbin is awesome and also Steve mould.

[@petemiller519]

This channel is a perfect example of the positive aspects of the internet. Great video. Cheers from Canada.

[@aervanath]

The ice skating thing is a myth, ice skates don't cause enough pressure to form water under the skates. They're just skating on ice, it's not well understood why it works.

[@lucieciepka1031]

Destin from smarter every day has a slow motion of skates that gives a bit of glimpse on it

[@SteveMould]

Oh wow, thanks for this. I've added it to the pinned comment.

[@guillermoalejandroperezlob5208]

Came here to say this. It's true that it isn't well understood. My thermodynamics professor at university suggested to the class writing a dissertation on exploring why ice skating works. Nobody took up the offer. It's a hard problem to solve.

[@crackedemerald4930]

i've seen a scishow video or someone else about it. they say that skating happens because water on the surface of ice is looser than further in. so it's kind of like you're always on some liquid sort of situation

[@JolanRensen]

kzbin.info/www/bejne/r5u2l2qPnZ6IkMU

[@SuperGclause]

I was like that looks like Tom Lipton's....... WOW KZbin collaboration for the win!

[@thedutchonequestioneveryth4128]

After 15 years on youtube, i discovered your channel finally. Thanks for al the nice education!!!!

[@aabsc]

This reminded me I almost ordered glass syringes years ago and eventually forgot about them. Just ordered a few as I've always been curious about how they work and was amazed at how they can spin like that.

[@johnc.392]

OOOOHHH So that's why my paper slides so far and then stops suddenly on a smooth wooden table !o!

[@richardc.7310]

His face when he says "it's a word" 😆

[@matthewcampbell7153]

Great video Steve... I have seen this video a while ago but interesting to watch over and over. Thank you...

[@MasterMindmars]

Very good explained and showed. Very complete. Hard disks uses the same air cushion to avoid the head to touch the disk.

[@walkinmn]

This and glass stoppers for glass bottles have always been interesting for me but I always though the matte surface on one side was part of how it works

[@Chiberia]

Two years late, but FYI,the matte surface is an artifact fro the precision grinding that gets the pieces to fit so perfectly. In a way, you're correct, as without that grinding it would be near-impossible to get the glass to match, but the ground pattern, itself, does not impart an effect. Funny enough, this is why Steve's advice in the beginning works - sometimes the grinding isn't perfect, and by manually rotating the glass against itself for a few minutes, you're effectively grinding down any high spots that were left to create a compatible surface.

[@BigJohn4516]

The head on a hard disc floats over the media surface in a similar way. There are also pumps and turbines without blades which use this principle.

[@Lishtenbird]

And also FDB fans common in PCs.

[@ryanmalin]

Thanks for teaching me about glass syringes. I use medication and ive been looking for a more durable, reusable syringe for accurate dosage. Thank you sir!

[@SC-bg8wf]

Really interesting. The quality of the explanations was unbeatable. The syringe reminded me of fire pistons, but that a different subject.

[@igxniisan6996]

“BOING” -Steve. Yes he is a man of culture, ladies n gentlemen.

[@anthonyiodice]

“I think I’m gonna buy an air compressor” I literally loled

[@Webrexxx]

You are my new favorite youtube person! So good! Keep making videos!

[@hamishlivo]

Your videos keep getting better and better 🙂

[@renzox1136]

Really really interesting as usual, thank you! Nerd me says: just double-check the ice-skating stuff. Seems ice isn't melting at that pressure, but the gliding effect is due to loose water molecules on the surface. Just saying...

[@benjaminmiller3620]

The pressure isn't enough yeah, (by a couple of orders of magnitude).But friction heating can account for the thin film of water. (that's what loose water molecules are...)

[@renzox1136]

@@benjaminmiller3620 that would mean an unslippery ice at very low temperatures. I stand by the loose molecules, with or without friction ;)

[@Jesse__H]

I never knew glass syringes even existed! Although I believe have seen similar technology on certain high-quality bongs 🤐

[@mohamedelouadghiri2016]

me too

[@cyancoyote7366]

It's quite possibly better, as a person who isn't specialized in healthcare, to have experience with bongs rather than needles and syringes.

[@revimfadli4666]

@The Lost and Damned now I remember where else did I saw that airtight rough surface

[@ExpatZ266]

Wind is the ultimate and ubiquitous example of atmospheric viscosity. It's a rare day you can't go and demonstrate this pretty much anywhere on the planet.

[@maxxod1]

That had to be one of the best explanations of how a bearing works. Good job on that. There is one factual error though. Ice does not melt when you skate on it. At one time that’s what people thought but it has to do with the molecular bonds of the surface layer that makes ice act like liquid water when pressure and or friction is applied.

[@carameljax222]

Hi Steve, I think your videos are great! That sticky air phenomenon is called the Coandă effect. I once worked with a company that put that effect to good use in one of their products.

[@ltflipper2]

Is this really the same as the Coandă effect? As I understand it, the Coandă effect applies to air that was travelling in a straight line bending to follow a curved surface, whereas here the air was never travelling in a straight line. Also, I'd be interested to know what product you're talking about. The way you phrased it makes it sound like it's not a high lift device, but I don't know what else it could be.

[@carameljax222]

Hey @@ltflipper2 , You’re totally right. The underlying phenomena are similar, but the aerodynamic bearing is more like the Magnus Effect. The product used the Coandă effect for styling hair!

[@webchimp]

I first learned about the Coandă effect when Formula 1 teams started to exploit it, by getting the engine's exhaust gasses to stick to curved bodywork and increase aerodynamic performance.

[@Maybe-So]

Tom Stanton did a video on the Coanda effect drone... kzbin.info/www/bejne/f6PTkKmkorqKkJY

[@RFC-3514]

"That sticky air phenomenon" is simply called viscosity.

[@sweeflyboy]

I have, for a long time, been sort of holding a sheet of paper by one end and letting the other end bend by putting about a quarter of it on the table, and letting go. Similarly to the playing card, it slides for incredibly long distances, provided good table surface.

[@morkovija]

That was exquisitely good video Steve, thank you

[@howardosborne8647]

Nicely explained,Steve. The other common place that this principle is often seen is placing a hot cup onto a wet flat surface. The increased air pressure caused by the heat of the cup causes it to glide over the flat surface until it cools down and the hydro dynamic effect dissapears. Also seen by spinning a saucepan lid on a pan with boiling water inside. Another area this phenomena of boundary layer action is evident is the Tesla turbine.

[@maghouinbeg5011]

It used to be thought that the skates made the ice melt through friction, and this water acted as a lubricant. This has since been proved not to be true. Have a look at It's Okay To Be Smart's video, "The Strange and Unexpected Reason Ice is Slippery ".

[@perfumedmanatee6235]

Dan Gelbart say yes!

[@bashchelik100]

yes!

[@cn-ml]

That was an unexpectedly interesting video, thanks for that knowledge

[@Cuzzazbuzz]

Oh this brings back memories from my uni days. I wrote a paper for my Masters titled “The elastohydrodynamics of thin shell journal bearings” and wrote a program to show these pressures including the cavitation as the fluid exits the load. A happy time when it finally worked!

[@supernurdo]

Do thermoacoustic cooling next!

[@Clough42]

This is also how hard drive heads 'fly' over the disk surface.

[@HK-cq6yf]

How do you manage to make every one of your videos the most interesting I've ever seen?

[@nickatronic1721]

no one has ever explained it so beautifully, so comprehensively and correctly! (and as a mechatronics engineer I studied mechanical engineering :D Incidentally, glass is not a solid, but a highly viscous, amorphous liquid, like stone. stones and glass can warp if stored improperly. thanks for the elaborate video! if you need something mechanical or electronic machined , you can let me know XD

[@georgantonischki1188]

I learned somewhere here onYoutTube, that the melting of ice with skates doesn‘t really happen, but that the top layer of atoms on the ice doesn‘t stick very well.

[@stoatzsanswich8744]

True. The ice would crush before you could apply enough pressure to melt it.

[@davidrice4873]

Fascinating! What an incredible video I always love watching

[@goofyrice]

Dad?

[@davidrice4873]

@@goofyrice son? Have you come from the future?

[@CJTongue]

The other half of the effect in the glass suringe is also very interesting, as the air leaves the pinch point it expands, reduces pressure and pulls the syringe up, this balance between compression pushing and expansion pulling means you end up with the glass being supported directly in the centre, which then eliminates wobble and makes it a very efficient spin, which is also why it lasts so long and you can use a very rough turn to get it working. I'd be interested in understanding the larger applications, the low friction/low effort/no wear set up could be very effective in heavy industry (e.g. the turbines you mentioned) and the autocorrecting rotation good where high tolerance is necessary - a self balancing system could have unlimited accuracy

[@Stikes72]

First time seeing your video, very easy to digest explanation, thankyou!

[@benjaminsmith3625]

Is there a reason these aren't named with a "pneu-" prefix, like the distinction made between pneumatics and hydraulics?

[@59jm24]

Gasses and fluids generally behave identically.

[@NetAndyCz]

@@59jm24 Gasses are fluids. Both gasses and liquids are fluids;)

[@Kenionatus]

Because it works the same way with both gasses and liquids. Maybe also because pneudynamic bearing doesn't sound very good. :)

[@sleeptyper]

"pneu" would indicate a tire. "pneumatic" would indicate breathing, thus air pressure and aerostatic system. Also, -fluids- liquids are typically almost uncompressible, unlike gasses.

[@brookerose1312]

@@sleeptyper I think you mean liquids, not fluids. Gasses *are* fluids.

[@MrDinoboy1]

"Don't be disappointed if it doesn't work with your personal kit". lol

[@marvec82]

Great demonstrations! As you have touched the topic of air viscosity - the ground effect came to my mind immediately - when landing a plane, roughly at the height equal to its wing span, you start flowing on the air cussion, the air that the plane is squeezing between itself and the ground. Maybe a topic for some future video...

[@beautifulsmall]

looking forward to seeing your video on the different air compressor connectors. I now have a draw full.

[@lordicemaniac]

so this is something similar to magnus effect, you can make airplane wings with that

[@hunterwilk]

I was thinking boundary layer as soon as I saw the demo with the syringe.

[@EricSoaresE]

Tom Stanton would like to know your location

[@jaypaans3471]

Actually I have seen concepts of large ships with two ridiculously big vertical cilinders that spin and somehow (help to) push the ship forward.

[@chrisbrowning360]

"Boi-yoi-yoing. It's a word." I almost pissed myself laughing

[@isavv_]

Great video and explanation! Also the reading head of an HDD is working with the same principle.

[@chrisrohde7696]

Happiest and best comedy of any of your episodes i have seen yet.

[@ailaG]

"This isn't the intended use of a glass syringe"

[@HebaruSan]

Looking forward to "15 cool tricks with an air compressor"

[@brainretardant]

Like an infinity whoopee cushion

[@Alzexza]

Love your stuff Steve!

[@designerd77]

I had an class as an undergrad in Engineering called Tribology which went into the heavy math behind this phenomena. Great Video

[@Oncodine]

Steve Mould: this is aerodynamic Gawr Gura: i am hydrodynamic Both: boing boing

[@speedrag0n12]

a

[@sirnikkel6746]

a

[@niklaskoskinen123]

2:55 fluid dynamics is the top level term, whereas hydrodynamics specifically addresses liquids and aerodynamics gases. So no, it's not a hydrodynamic, but perhaps either a fluid dynamic or an aerodynamic bearing.

[@jojojorisjhjosef]

gas is a fluid

[@niklaskoskinen123]

@@jojojorisjhjosef but not a liquid. Not sure if you commented before the edit though.

[@jojojorisjhjosef]

@@niklaskoskinen123 ah sneaky edits, I see.

[@ASJC27]

Aerodynamics refers to gases, but hydrodynamics is very often used interchangeably with fluid dynamics as a general case for both gases and liquids. That's because gasses at low speeds (typically up to Mach 0.3) behave dynamically the same as liquids. The math is exactly the same in both cases. Examples of classical texts that use the term hydrodynamics to deal with air as well: "Theoretical Hydrodynamics" by Milne-Thomson (originally, 1938) and "Hydrodynamics" by Lamb (originally, 1879). This unification of all low speed fluid dynamics under the banner of hydrodynamics is common even today. It is also possible, and common practice, to use experiments in either air or water and apply the results to the other medium. For example, my MSc research was on hydrodynamic stability of sharks. I used wind tunnel (air) experiments performed on a 3D printed shark model to model the hydrodynamic forces on the shark. From the other side, water tunnel measurements are often used when high Reynolds, low speed experiments are required, even if it's for an airborne system.

[@niklaskoskinen123]

@@ASJC27 this is quite convincing, so I guess I just don't support the use of the word hydro- when referring to gases. I mean hydro literally means water so extending it to all liquids is already a stretch. And we do have words fluid and aero-, if we want to talk about gases or fluids in general.

[@danielmcgraw812]

That’s incredible, thanks for the video

[@dalor4906]

Fill the tube with various gases to test their viscosities so we can see it Great video, thanks. Always appreciate new knowledge.

[@han5vk]

Today I learned glass syringes exist.

[@thejokestersquad3686]

Same here

[@RFC-3514]

Today I learned that several people didn't know glass syringes existed.

[@TheWilldrick]

Next collab with This old Tony or we RIOT 😂

[@zodak9999b]

And Abom79 after that! (or at the same time)

[@SmilingDevil]

Picked up a glass syringe on a yard sale about 10/15 years ago… today I dug it out to try this… awesome!!

[@FrancoGrimoldi]

Always learning something new here, thanks!

[@nathantron]

Did you also know(and notice) when you passed a current through the bearing, that it actually stopped the bearing abruptly? You're changing the properties of the metals magnetic field where they come in closest contact. This is also why you see a much crazier affect if you used something like copper plates.

[@johnnywoods5549]

Are you referring to Biot Savart law and Lenz's law? When a current passes through a conductor it creates a magnetic field and when a magnetic field passes through a conductor it creates eddy currents which in turn creates a magnetic field that resist the change in the magnetic field that created it.

[@nathantron]

@@johnnywoods5549 I think so. Veritisium and Smarter every day did videos on three different effects that are happening "behind the scenes"

[@johnnywoods5549]

@@nathantron I mentioned biot savart and lenz laws because saying "changing the properties of the metals magnetic field " is a very odd way of putting it, you're not really changing the properties of the magnetic field the current creates the field and it reacts to other conductors creating eddy currents which also create magnetic fields.

[@the_hanged_clown]

wondering what effect, if any, putting tesla-valve patterns into these surfaces might have

[@jupa7166]

Hydrodynamic bearings in modern hdds indeed DO have a pattern on a shaft's end! (yup, I've ruined one out of curiosity)

[@larryariscon6120]

I learnt this cause to motion which means to accelerate just like the plastic over melted inside the barrel causes the screw to slip because the plastic resin was over melted from setting higher temperature. What a good term to know in industrial sense. Good day and great one!

[@maxpolaris99]

Fascinating Captain!

[@innocentbystander6620]

Boyoyoiiing. I’m gonna make that my PlayStation name.

[@montgomeryharr30]

How am I this early lol

[@RowanAckerman]

Good question. Right now it says that it has only been up for 5 minutes.

[@Grandwigg]

Tell me about it

[@sirflamedrop6165]

Ik right

[@coryshannon449]

This was uploaded 24min ago how did you comment 29min ago?

[@pushbaner5219]

Boioiyoing

[@1977jelliott]

I was watching Oxtools yesterday, then I get a Steve Mould video, with Oxtools, today is a good day.

[@emiliengranados805]

me in search of learning things, finding your channel, watching all videos !

[@barrylovesgaming]

The only question i have is, who on earth uses the big syringe?

[@rickharriss]

Vets

[@fzigunov]

Everything was going well until he mentioned the hyperloop.

[@funkaddictions]

Great video! At 5:16 I think it's because both surfaces are so smooth that at the molecular level they are essetially acting as suction cups.

[@daves1412]

Brilliant. Just great. Thank you