Do Lego Wheels Spin FASTER in Vacuum?
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- Опубліковано 29 жов 2021
- I tested a few different Lego wheels in 70% vacuum. Enjoy!
The answer to the title question:
Yes in general, but it depends on the wheel size and balance. The best speed improvement was from 5100 RPM to 7000 RPM which is a 40% increase. Some wheels didn't gain much as they started to vibrate in high speeds. The smallest Lego wheel didn't spin any faster in vacuum. - Наука та технологія
Things I never wanted to know but now
really want to know.
What 🤔
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Definitely makes sense due to less air resistance, I was just waiting what you would use the vacuum from your last video for :)
Yes sir
Yeah
General term is 'Drag Force'
@@TheSAWR Air resistance/friction is another proper term. :) How did BEC align the laser tachometer light through the glass? If he was a mm off, the light would refract due to the glass refractive index and angled surface. He must have had the laser strike near perfectly perpendicular to the cylindrical container.
Exactly my thought
I definitely expected the paddle-esque wheel to see a big improvement, and it did!
You understand drag.
@@Sqlut 😎 200 IQ physics legend
@@KIMG69 🥇
@@KIMG69 it easy to understand
Drag basically air resistance ye
Less air, less resistant, more speed
so cool you used the lego vacuum pump too haha. its like you can make a whole set of tools out of lego to do more tests
how can I choose a keyboard for CSGO?
Uwu
it's*
it seems you're too confused to be dead or not please decide already
yo
The craziest thing is that this is made almost entirely out of lego
Hmm
Not the jar
@@TheAcidicMolotov damn, i didn't know.
I wonder if lego made that vacuum chamber too
@Casix03 the earth is almost all metal, keyword almost.
It seems like an unstable axle could be the biggest RPM killer. So what if the axle had a stabilizer on the other end?
Ohhhh idk
@@L4BRADOR Huh
Maybe it would explode idk im not good at physics
@@make883 you know you dont have to answer if you dont know, right?
@@Gandhi_Physique ye
Those differences were larger than I expected.
How about doing the opposite and fill it with more air?
This effect is seen in drag racing, you get more power at sea level, but also have to push through denser air.
It would be interesting to see a tesla or any pure electric car test sea level tracks and high altitude tracks. The electric car should be faster at high altitudes.
@@xjmg007 I assume this has to do with their internal combustion engines having access to more air?
@@wilms2328 yes denser air makes for a denser charge and allows for more fuel to burn, increasing cylinder pressure. Perfect scenario is low altitude and cool temps. Turbos and super chargers can overcome this mostly, but still are effected by altitude
@@xjmg007 also the reason why most pikes peak vehicles are super or turbo charged. natural aspirated engines have less oxigen intake to burn at those high altitudes
@@minuisprobably8120 yep, that's also why old airplanes had turbocharges, I believe it's called turbo normalisation
1:15 the way that wheel expanded from centrifugal force ( 0-0) thought that thing was gonna come apart.
Really
1:15 kinda reminds me of those high performance RC car wheels we (tech nerds) all saw on 2013 YT that balloon at high speeds. :)
Dragster tires do the same thing
Centripetal*
I thought that was just it wobbling around really fast to the point where the wobbling blurred
nice experiment! Good demonstration of air drag on different wheels.
Could you please make an new episode about how Lego propeller spin in vacuum chamber. That must be very interesting.
Lego propeller basically the same, just useless bc no air
Is it just me or does this Channel make you want to buy some Lego?
@Jojo Bugar Indonesia uncalled for man.
I love how his vaccuum creator is made of lego
Huh... Are you planning on building a satellite entirely built with Legos?
It strangely looks like a reaction wheel they use in satellites.
(It wouldn't be too surprising from him... lol)
What if this channel partnered with bps space....
It'd make a cool video and I think you can buy space for a cubesat for "relatively" cheap.
LEGO Cubesat lets goooooo!
He’s testing the wheels in a vacuum to build a moon rover
it makes sense, altho i wasn’t expecting that large of a difference! the wheels aren’t really displacing any air as they rotate so it really surprised me that you gained nearly 40% on that first test!
Same, I was expecting a smaller improvement
although the amount of air and average density in the chamber stays the same, the wheels still experience resistance due to turbulent flow, like stirring up some water.
the air in the boundary layer has viscosity just like any liquid so the resistance comes viscous drag and turbulent flows from the rims
When you brought over the contraption from the last video to make a vacuum chamber I was like… “this guy is a genius!”
Do you get a difference between inside and outside of the glas at 0% vacuum? I could think that there are different kinds of turbulences.
Potentially. :) However the differences in turbulences could be minimal. You'd think the air in the glass would start forming a cylindrical vortex in the glass in the same direction as the wheel spinning. We need a 3d aerodynamic simulation to determine the effects of spinning in a large room vs a small jar at STP (20°C, 1 atmosphere)
@@thatguyalex2835 smart, and i want the simulation to also understand
Except that would be changing an additional variable in the test, you want to test under the same conditions, other than the specific thing you are testing
@@thatguyalex2835 Maybe an outdoors test, too.
@@quackin12152 But that means modelling the exact shape in computer aided design (CAD) software and then the use of computational flow dynamics (virtual wind tunnel) software. :) Lol... But hey, if someone has time, maybe they could do it.
the paddle one makes the most sense, it literally has to push so much air each revolution. Also I kinda liked this shorter video, you could do some actual youtube shorts
Heck nl please no yt shorts
please no.
They all make sense, really. Particularly the ones with more surface area, as that adds more friction with basically everything.
Please not the shorts trend again
youtube tiktok huh NO
It wasn't a question that had ever really crossed my mind but i'm glad I know now and proven with Lego.
Found this channel 4 months ago at 3 am and still watching
Cool videos as always! I always find them very intriguing!
Like the way he still uses lego even to pump the air out 👍
It's mind blowing to see how that little amount of air can create such a large amount of resistance....
"Little" amount of air. We don't think air is heavy because we are born in it, live in, and will probably die in it. Similarly a fish likely wouldn't consider water any kind of barrier or obstacle, yet water is even more dense than air.
At sea level a cubic meter of air weighs between 1.1 and 1.4 Kg per cubic meter (depends on temperature and humidity) So even in the relatively small swept volume of the paddle/wheels, it could be tens of grams, maybe hundreds at high RPM.
That's just pushing air out of the way, in aerodynamics there's another issue with the low pressure area created behind the structure moving through the air. This low pressure pulls the parts back, and is often at least as significant, if not sometimes more, than the high pressure building on the leading surface. So you can comfortably double the 'effective' mass of the air to account for that.
@@kal9001 We don't feel wind heavy when we don't have speed or the wind doesn't have speed... But when the wind is blowing on a high speed or we're running or traveling at a high speed, that's when the resistance is felt... Just like a fish will consider water as a barrier when swimming against the current.... But you have a point too... There are other things to consider such as pressure, aerodynamics, heat and many more....
The most fascinating part of the video was when he just casually whipped out a frickin' LEGO vacuum pump
that was really freaking cool! keep up the great content.
Quick, informative and no extra fluff, great video!
@Myles Fletcher No you
@Myles Fletcher I dont think so
@Myles Fletcher absolutely cutie
Another video you could do is "How would an internal vacuum affect buoyancy?" I assume it would make it float since it is less dense but that would still be cool to see.
It floats
That was really a nice experiment 👍
Wow!
I also like how you used last video's pump :D
I love this, theres no life story to it - just what I wanted to see, respect!
We casted this video at my grandma's funeral yesterday. RIP Gertrudes.
I was waiting for him to do 100% vacuum. . . .
still, great video !!
I'm always watching for your videos 😘😘
Good job on frequent uploads 👍
love the little vacuum pump it is effectively what it is
I love your videos ❤️
Me to
Very nice! Thank you.
I posted a vacuum chamber related video within five minutes of you posting this, crazy!
14k must be the maximum operating RPM of the motor (edit: at that voltage). The resistance offered by the small wheel was just not enough to impede rotation at all, so any reduction in resistance would do nothing. I'd be curious to see what the motor's RPM is with no attachment. I'm betting 14k
Very interesting video! Thanks!
I love this channel. None of it's anything like "HEY GUYS! I SPENT *insert money amount here* ON *insert purchasable thing here* AND DID THIS THING WITH IT!!!!!" It's just cool Lego experiments. And I love it.
Great demonstration of air resistance.
I dont have Legos but i still watch your video cause you are so passionate on this and provide good content
That was awesome !
This guy deserve a nobel price
You should attach a temperature probe to the motor and test the difference under vacuum.
the fact that you made the vacuum pump from lego too just shows the dedication
Its mainly based on how much friction the wheel creates and the weight/size of the wheel so the small wheel had no speed change because it didn't encounter alot of air resistance
Yes. Idk why we had to test this, but nice video. Im more impressed by the vacuum pump. GJ
Ah yes. *CONTENT*
Thanks for the video
After 10 years, Nuclear reactor using Legos
If you notice in races that cars draft other cars and move faster, picture this the same way as there is no air resistance
that lego vacuum pump is so adorable
Oh god, not dragging it out for 8 minutes? Doing god's work there, thank you
I love how you even used legos to take the air out of the vacuum
I just realised you have nearly 2M subscribers. Holy moly.
the Lego vacuum pump is so nice and cute looking
I love the fact that the vacuum was pulled using the lego pumps.
This was fascinating
Did this man make a Lego air pump to pull the vacuum just because he can?!
Legend.
Thank you for video :)
I love the sound of the big rubber ones
Running tests for the spacecraft design. Nice.
I love your channel bro
LEGO vacuum pump blew my mind
This is exciting to see because the ingenuity helicopter on mars is currently having trouble flying due to reduced pressure and the tried spinning the blades at higher rpm, however they met an issue where the higher rpm increased a certain type of drag significantly, allowing it to fly but it was extremely hard to maneuver
This guy must make crazy money with videos like this. 43k views in just two hours… and adverts shown in this video. And it’s definitely worth to watch the videos, interesting!! Kiitos
The sound sounds awesome
Results, I love it!
Never stop making these
This is actually pretty cool.
Now I get why so many physics question start with "In a vacuum"
I really didn't expect such a significant difference for the first wheel. I guess it has pretty big spokes.
i love the hum the unstable wheel makes
This channel is awesome
wasn't expecting THIS MUCH of a difference on that first wheel
Interesting.
Without the vacuum, the wheel would have to deal with outside forces.
Do you mean air friction? No other outside forces are being removed here.
Yeah
Great, dude!
I f*cking love this channel
It makes sense but I wasn’t expecting such a noticeable difference
That made more of a difference than I thought it would
If you decrease the drag force (Which in this case is the container's right-handed air) within a space (Which is the Container), you will increase the terminal velocity, but if what is being accelerated is very small and without mace this terminal velocity it will be the same with the no vacuum.
I believe that's it if I'm wrong please correct me...
It's a factor but here the issue lies in gearing. 14000 RPM is "the redline" for this engine+gearbox. To test the small wheel a different gearbox would have to be used.
I knew that it would spin faster but by this much?
Crazy
Surprised the giant tire wheel didnt have a larger benefit from thd vaccuum. With all that surface area I figured the skin drag from the air would be pretty sizable. Wheel size certainly seemed to be a driving factor for the other wheels.
For context as to the scale of these speeds:
0:09
That’s beyond the redline of some old CP V8s.
0:32
That’s beyond the redline of a Subaru EJ25.
0:50
That’s beyond the redline of newer CP V8s.
1:07
That’s beyond the redline of generic production V10s.
What an interesting thought put to practice
Satisfaction has got the best of me.
Can EV3 die, or is it strong enough that it'll stay relevant for much longer. I have been fan of lego mindstorms, I have used nxt, rcx, and ev3 before. I really want to buy the an ev3 kit. Is it advisable or should I buy the newer midstorms?
I expected a vacuum video after the last one, I didn`t expect another wheel test. I didn't know I wanted another wheel test.
Hey i will respond your comment in the first minute you posted it!
i definitely thought there would be a relation but I didn't think it would be that much! dang!
I would think that once the air pressure is removed the limiting factors are the motor power and friction of the moving parts.
Wasn't expecting that much difference!
We should be traveling in vacuum, in those "hoverboard" trains.
I never knew I wanted to see this
I wish I could do stuff like this
And he’s back at it with the Lego wheels
This is a good way to teach children about air friction
I think he's preparing to go to space finally
This channel is so good
I was not expecting the vacuum pump to be built with Lego as well