Quite impressive that these speeds were reached so quickly compared to with the motors. Btw, maybe you could try using a steel lego axle instead of the plastic ones to mitigate the problem of the axle bending. I wonder what speeds could be achieved with that
That tire could blow a 12 foot hole in the wall had it broke off the axle. I mean the damage it could create. My friend did this once and the tire came loose at 6000 rpm and it blew out his Wi-Fi. They had to use cellular data for 8 hours!
There's just something about this channel thats so satisfying and deserving of the views. Maybe it's the fact there's no bs, no merch plugs, and that it gets right to the point. Eitherway, love the random experiments, keep it up!
Man I love this. My kid is still 3 years old and we just introduced Lego as next step from Duplo. I can't wait to do stuff like this and teach physics :)
For me, it was from Mega Bloks to LEGO and Mega Bloks, (I think it was them) because they were somewhat compatible. Probably didn't have motors or technic stuff, though.
The wheel looks around 7 cm in diameter, meaning if this tiny wheel was on the ground, spinning at 20.000 rpm, it would be traveling at a speed of ~ 264 km/h For reference a regular car tire on the freeway does around ~720 rpm to travel 115 km/h If your car tires were doing 20.000 rpm, you would be traveling at 3.150 km/h, or about 20% faster than an AK47 bullet
What if there was somehow a method to release that wheel like a beyblade? It would become a weapon of mass destruction OR a really really good beyblade
Do you think intentionally setting the lowest gearing to disconnect after dumping the power in would make it work better? The last one at least seemed to spin longer when that happened unintentionally. Not sure how you would make it disengage, but I wonder how long it could go, and what might make the length of time spinning go up.
youte definitly right, if they disconnected the gearing from the wheel at the end of the pull, that would allow it to spin longer and free-er. Idk that it would improve rpm, but it would give more time to measure the rpm before it dropped off.
@@EllaBananas you're absolutely right it wouldn't spin faster; it only speeds up because of power being put into it, and disconnected it can't put in more power. But spin time and reducing friction tests would be neat to see.
@@Airin258 good point, I forgot that was the only one lubricated, but removing the second shaft by disconnecting it making it spin longer could be interesting. Also, decoupling might make it spin more as less sections experiencing friction, but also less inertia because it is removing weight, but also also it's a minor weight change because the spinning wheels are obviously vastly heavier, but also also also the bearings on the spinning section could be made more focused on low friction while the power train focuses on maximum power and ignores friction because the decoupling . . . basically it could be cool to try?
Yes, obviously. The less mass on the wheel, the less torque needed to spin it, even with the part limitations (as in, the axle twist and the damage from lack of lubrication). So given the same amount of torque applied (same person and gear set), you will see an increase in RPM.
The speed doesn't really matter that much since it's all about energy in vs energy out. We would be talking about some fraction of how much energy our hands provide into the system which isn't that much. Imagine people using exercise bikes to provide electricity, it hasn't caught on because it's not that effective.
I see someone else has already suggested the steel axle. The ripcord was a great idea! I wonder if the rubber tire induces air resistance. Maybe you can achieve a higher top speed by removing the rubber tire
@Marshall Williams I'd be interested to see the tradeoff if the rubber tire was instead a lead wheel: You'd get an increase in duration of the system, but probably at the cost of RPM given how briefly the energy inputted lasts.
What I like with your channel, to compare with other "bricks experiment channel" is that you do not want to break record, just to break record, which can lead to bad design choice. You make it for testing, with the correct solutions. Even if I am not interested by breaking record, I am always surprised by the idea you come up to figure out the problem in a smart way, instead of just using 100x motors for instance. It is a nice way to show how a problem can be solve using mechanic.
its so cool how you can multiply the speed by getting a bigger wheel to rotate a smaller one, the amount of energy this would be making would be quite impressive
That's cool! And while it's fun to experiment with LEGO it actually had been interesting to see what's achieveable with metal instead of plastic. It should allow far higher rpm.
If you're attempting the highest RPM I'd suggest using a flywheel with a smaller diameter than the wheel and tyre. The larger the diameter the faster the surface speed, if you like, of the outer diameter of the flywheel, thus resulting in a higher energy requirement. You probably wont see much improvement without using the ripcord method however. All in all, though, a very enjoyable video 👍
So I was curious how fast a vehicle with these tires would be travelling if we used the final figure of 19,300RPM: Lego studs are spaced 8mm apart from stud centre to stud centre. The wheel used appears to be about 8 studs long ending in the centre on either side. This means that our wheel has an approximate diameter of 7 times the stud centre spacing ([Stud 1 to Stud 2] + [Stud 2 to Stud 3] + ... + [Stud 7 to Stud 8]) which is 56mm or 5.6 cm. The circumference of a circle is 2*π*r, or π*d, giving us a circumference of π*(56mm) or 175.9291886...mm, rounded to 175.929189mm since we are multiplying by 19,300 RPM, and we want to be as accurate as possible here. multiplying our circumference by our RPM will give the theoretical speed of this wheel. 175.9291886mm*19,300RPM gives us 3,395,433.33998mm per minute (RPM = Rotations Per Minute). We then multiply by 60 to get the distance travelled in an hour, which is 3,395,433.33998mm*60 = 203,726,000.3988mm/hour. Finally we convert this to KM which means we divide our result by 1,000,000, giving us a speed of 203,726,000.3988mm/hour÷1,000,000 = 203.7260003988km/hr, rounded to 203.7km/hour. This of course ignores factors like the wind resistance on the theoretical vehicle, friction between the tire and road, and the weight of said vehicle, but this was still a fun thought experiment.
That was really, really cool. It makes me think about how human tech is so advanced that a toy can be made to spin a thing faster than was probably even possible with state of the art tech what, 300 years ago?
I'd be interested in seeing how fast you can get the wheel to spin by hand, but continuously, maybe for about 30 seconds or so. Getting a high peak RPM is interesting, but using a rip cord design makes it impossible to maintain that speed once the string is exhausted.
This is a neat twist to the spin a wheel challenge! Really brought joy to my night Would there be a way to reinforce the input shaft? Perhaps could make hand turning get a little further
I think you could hit 20k rpm if you made the construction more sturdy, I've noticed that with a couple of your builds, that things are vibrating quite a lot.
For the string and lube tremendously gives me beyblade vibes, for the ones who doesn’t know (the string and lube) actually works like a string launcher in beyblade, sheesh I wish I could see a beyblade launch with the use of lego. Your videos are amazing!
I feel like you could potentially hit the speed of sound at the edge of a large wheel. At 20k rpm you'd need about a 33cm diameter wheel. Not sure how feasible it would be to make the whole thing out of lego, tho.
Maybe steel axels, gears and supports but then I suppose eit kinda defeats the purpose of being made relatively easily using lego. Still would be cool too see
Nah, it already is way beyond speed of sound. Sound is moving by 340m/s, so 34.000cm divided by 20.000 RPM = 1,7cm circumference per rotation would already be enough. 1,7cm divided by π = 0,54cm diameter of the wheel
@@philruu you're confusing rpm with Hz. 20k rpm is 333.3Hz At 333.3Hz you need a perimeter of 340/333.3=1.02m to reach the speed of sound This gets us a radius of 1.02/(2pi)=0.162m, which is a diameter of 32cm.
Moment when spinning lego thing has better sound than my old moped.
The 19300 rpm’s one sounds like that one Toyota at 2:am
🤣
Mitsubishi Materials
more than my grandpa's car lol
it sounds like a really nice 3-cylinder
Nearly hitting 20,000 rpm with lego, string and lube. Amazing.
That’s physics baby!
and it sounds like F1 loooooool
It actually was a bit more than 20,000 rpm. You can check it by the frequency it produces in the spectroid app (around 337 hz) and multiplying by 60.
anything is possible with enough lube
Lego, string and lube is my favorite Friday night activity
It’s kind of cool how the higher up the gear ratio goes, the more it sounds like an actual engine
ghê
thanks captain obvious
@@HeadsetHatGuy me pointing out that it’s cool that it does this is me being obvious?
What?
Sounds like a V10
@@MysterDaftGame Huracan
nuts how just the slight optimizations jumped it from 13k to 19k rpm
shobby steve
@@meep.472 i don't think it's a bot
@@Desugan69 he lacks critical information
adding lube is far from a slight optimization.
Imagine sitting on it. It would make a great buttcrack scratcher.
The noise of the lubed wheel almost reaching 20,000 rpm sounds like a real car engine. Absolutely stunning!
And not greased either. 19000÷60=acceleration sound
Fr sounds like an Audi S1 Quattro
sounded like a v10
I'm tempted to play this for my car guys.
1:04 already sounded like an engine
The quality and durability of lego pieces never ceases to amaze me, to be able to reach such crazy RPMs and survive all that torque.
Quite impressive that these speeds were reached so quickly compared to with the motors. Btw, maybe you could try using a steel lego axle instead of the plastic ones to mitigate the problem of the axle bending. I wonder what speeds could be achieved with that
Well, he pulled from both sides at the end to reduce that but i think it will be good
Using the string is perfect because he gets way more power than the motors have bc hes pulling pretty hard constantly
Also maybe oil, for less friction?
@@gazooy45 Didn't you watch till the end?
@@cheeseinmypocketsvelveeta2195 Do you think somehow making the axle wider/thicker would maybe increase torque?
I just noticed he’s wearing gloves, this man understands the damage that a Lego can do at 12000 rpm
O think it's also because of the wire
That tire could blow a 12 foot hole in the wall had it broke off the axle. I mean the damage it could create. My friend did this once and the tire came loose at 6000 rpm and it blew out his Wi-Fi. They had to use cellular data for 8 hours!
12000? It gets to nearly 20000! Crazy stuff!
Insane
thats 200 rps
2:35 the gear: na man, I don't want to break
There's just something about this channel thats so satisfying and deserving of the views. Maybe it's the fact there's no bs, no merch plugs, and that it gets right to the point. Eitherway, love the random experiments, keep it up!
It's also an interesting juxtaposition between ASMR and simple mechanical curiosity.
The sounds help a lot too.
In a way it kind of reminds me of the Primitive Technology channel. No talking, just straight down to the topic at hand.
maybe it's because every so often there's another comment complaining about said merch plugs and such.
@@sillygoose635 your so stupid idiot it's insane. How stupid can someone be. Just pure stupidity. Cannot be described better. FKIN stupid shit
Love how it sounds like an actual engine
The last slow mo epic 🔥🔥🔥
same lol
Sounds like a v10
@@regulardudegam1ng 12 900 RPM sounded like V6 from F1 but the 19 300 is obviously Lamborghini Huracan 😆
It's sound like my mom blender
everybody gangsta until the contraption starts sounding like a freaking racecar
I love when people into subjects like physics or engineering use their knowledge to do stuff like this, so cool
Man I love this. My kid is still 3 years old and we just introduced Lego as next step from Duplo. I can't wait to do stuff like this and teach physics :)
For me, it was from Mega Bloks to LEGO and Mega Bloks, (I think it was them) because they were somewhat compatible. Probably didn't have motors or technic stuff, though.
For me it was normal lego first
i loved the 12900 rpm part it sounds like a realistic car doing a rev up
Agree lol
What type of generator is that
@@WheelStuff15 wdym by that ._. we are talking about the sounds of cars compared to the sound of those quantities of rpm
Oh i mean the shape of that macine......
But it sounds good
The wheel looks around 7 cm in diameter, meaning if this tiny wheel was on the ground, spinning at 20.000 rpm, it would be traveling at a speed of ~ 264 km/h
For reference a regular car tire on the freeway does around ~720 rpm to travel 115 km/h
If your car tires were doing 20.000 rpm, you would be traveling at 3.150 km/h, or about 20% faster than an AK47 bullet
Perfect math!
Holy shit that’s faster than sport cars
r/hedidthemath
What if there was somehow a method to release that wheel like a beyblade? It would become a weapon of mass destruction OR a really really good beyblade
@@koelian i like how you think
Do you think intentionally setting the lowest gearing to disconnect after dumping the power in would make it work better? The last one at least seemed to spin longer when that happened unintentionally. Not sure how you would make it disengage, but I wonder how long it could go, and what might make the length of time spinning go up.
I believe the reason the last one spun longer was because he lubed it. Less friction means less energy loss, therefore the wheel spins longer.
+ less friction without additional shaft
youte definitly right, if they disconnected the gearing from the wheel at the end of the pull, that would allow it to spin longer and free-er. Idk that it would improve rpm, but it would give more time to measure the rpm before it dropped off.
@@EllaBananas you're absolutely right it wouldn't spin faster; it only speeds up because of power being put into it, and disconnected it can't put in more power. But spin time and reducing friction tests would be neat to see.
@@Airin258 good point, I forgot that was the only one lubricated, but removing the second shaft by disconnecting it making it spin longer could be interesting. Also, decoupling might make it spin more as less sections experiencing friction, but also less inertia because it is removing weight, but also also it's a minor weight change because the spinning wheels are obviously vastly heavier, but also also also the bearings on the spinning section could be made more focused on low friction while the power train focuses on maximum power and ignores friction because the decoupling . . . basically it could be cool to try?
I like when the legos stop making normal noises and just start screaming
with the second half of the experiment, this asks the question; can we spin the small lego wheel even faster?
Oh yes, we can!
Yes, obviously. The less mass on the wheel, the less torque needed to spin it, even with the part limitations (as in, the axle twist and the damage from lack of lubrication).
So given the same amount of torque applied (same person and gear set), you will see an increase in RPM.
@@vtr0104 but at the same time, it would require more strength to keep the rpm stable
@@yourbigfan1777 Yeah, at one point you'd have to swap out the regular LEGO axles with something more on the metallic side
A bit of a question: how much electricity could you generate by spinning the wheels by hand?
The speed doesn't really matter that much since it's all about energy in vs energy out. We would be talking about some fraction of how much energy our hands provide into the system which isn't that much. Imagine people using exercise bikes to provide electricity, it hasn't caught on because it's not that effective.
not much, since you would need a super high efficiency dynamo, and also think about the gear ratio and the inertia
Less then a normal hand crank generator.Conservation of energy and all
Very little
how long do you want to spin?
"What's that loud, car-sounding noise?"
"Neighbor's playing with his LEGOs again..."
I see someone else has already suggested the steel axle. The ripcord was a great idea! I wonder if the rubber tire induces air resistance. Maybe you can achieve a higher top speed by removing the rubber tire
The inertia probably helps more than wind resistance hurts tbh
But it will slow down almost instantly, the wheel is there so the slowdown is slower.
It does somewhat, I think in the last video he made where he spun the shit out of a wheel he put it in a vacuum chamber and it picked up iirc 10-15%
@Marshall Williams I'd be interested to see the tradeoff if the rubber tire was instead a lead wheel: You'd get an increase in duration of the system, but probably at the cost of RPM given how briefly the energy inputted lasts.
Using steel parts kinda takes away from using just legos though...
Ok, I just watched almost 3 minutes of a man revving Lego...
... I have no regrets!
That did NOT feel like 3 minutes, it felt like 10 seconds lol
Welcome to the channel!
2:20 that's sound like Lamborghini huracan and you decided making a add hear axie and you sound like it
Fr
I can hear a LambAudi V10 in there, yeah.
it kinda sounds like my skoda fabia when high rpm added
That moment when your lego parts start to sound like a literal F1 car.
Edit: Fatfingered your to youe
Some of them sounded like a V10!
And it’s by hand
I mean the outside of the wheel goes at around 200kmh, if you assume d=56mm
I think it's more like a small two stroke single cylinder
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0:58 So that’s how lawnmowers pull cords work
Woah
Holy shit he did it what the fuck
Wow this is a great demonstration how gears work together
That final sound, sounds like a true engine... It could be a trick for sound designers in racing games !
Yeah.
no it sounds like the slowest and baddest and worst computer doing a startup
and then exploding
Suggestions:
1) test of the various traks tipes for tension resistance.
2) speed testing said tracks.
that just sounds better than a real vehicle engine lol
This may be the closest I’ve yet come to an intuitive understanding of how gearing works; thank you.
When he nearly hit 20k rpm, it sounded like a lambo lmao
Everyone is gangsta, until lego starts to sound like ferrari
1:15 I am Amazed and Happy to see the wheel go so fast! This reminds me of that rope top toy I played with lots of years ago
Very impressive, I didn’t believe that you could reach so many rpm with the hands
Gears do the magic
Yooo, That actually sounds like a real car engine!
This Guy Makes spinning wheel with hand Enjoying!!!
Love this Guy's Effort
That’s cool!!
Please try it out, or make one motor get to a high rpm
“Wow your car sounds amazing. How’d you do it?” Me personally in question:
Its so immersive feels like im spinning them myself
Is it bad that, as a Mechanical Engineer, I was giggling like a schoolgirl for the entirety of this video..? Haha! I LOVE your videos, my friend!
me too
Bro took At the speed of light to the next level💀
When you don't have lego motor for your lego experiments
1:27 sounded like an air raid siren
Sounds like 3t22 siren
dude this guy can make race car with this much rpm
2:03 man, someone really needs to make Lego bearings already
Why not try Technic wheel hubs?
That I want
The "Beyblade" drawstring is powerful...!
Actually, that would be a fun video idea! "Lego Beyblades".
Straight to the point. Not wasting any time. Love it!
1:05 sounded like a dirtbike
Fr
1:15 sounded like a sport bike
What I like with your channel, to compare with other "bricks experiment channel" is that you do not want to break record, just to break record, which can lead to bad design choice. You make it for testing, with the correct solutions. Even if I am not interested by breaking record, I am always surprised by the idea you come up to figure out the problem in a smart way, instead of just using 100x motors for instance. It is a nice way to show how a problem can be solve using mechanic.
its so cool how you can multiply the speed by getting a bigger wheel to rotate a smaller one, the amount of energy this would be making would be quite impressive
it's at the cost of torque though it won't be moving anything much
That's cool! And while it's fun to experiment with LEGO it actually had been interesting to see what's achieveable with metal instead of plastic. It should allow far higher rpm.
Suggestion: what if you use aluminum axles and beams?? Plus the WD-40 as well
Edit: any lubricant is allowed as well
fun fact: WD-40 is not a lubricant
It's a solvent
That 20,000 rpm slow-motion genuinely sounded like an engine.
It sounded like your friend’s Honda Civic at 2AM
You should do that with the Lego engines and make them go real engine speeds, and see how long they last till they throw a piston, or sieze
Away furry!
there was a vid where some dude got a boxer 4(?) to iirc 20k rpm, so it's theoretically possible if you use lego parts made from graphene
@@Ten_Thousand_Locusts *SLASH* IT IS NOT A GOOD TIME ANTI
War rushia and russia has occured
Do you really think its best to hate?
@@seantaggart7382 Yes. Degeneracy has weakened the West.
@@drunkenhobo5039 nope
*it is my Hope to save humanity*
dang that is hella faster than i thought this video would reach
Shits so fast it twisted the Lego bar 💀💀💀
That 2:22 automatic ejection of an axle and a gear was great! :D
Saved a lot of energy possibly lost due to friction, lol.
If you're attempting the highest RPM I'd suggest using a flywheel with a smaller diameter than the wheel and tyre. The larger the diameter the faster the surface speed, if you like, of the outer diameter of the flywheel, thus resulting in a higher energy requirement.
You probably wont see much improvement without using the ripcord method however.
All in all, though, a very enjoyable video 👍
Bruh when it sounded like an actual car tho 💀
So I was curious how fast a vehicle with these tires would be travelling if we used the final figure of 19,300RPM:
Lego studs are spaced 8mm apart from stud centre to stud centre. The wheel used appears to be about 8 studs long ending in the centre on either side. This means that our wheel has an approximate diameter of 7 times the stud centre spacing ([Stud 1 to Stud 2] + [Stud 2 to Stud 3] + ... + [Stud 7 to Stud 8]) which is 56mm or 5.6 cm. The circumference of a circle is 2*π*r, or π*d, giving us a circumference of π*(56mm) or 175.9291886...mm, rounded to 175.929189mm since we are multiplying by 19,300 RPM, and we want to be as accurate as possible here. multiplying our circumference by our RPM will give the theoretical speed of this wheel. 175.9291886mm*19,300RPM gives us 3,395,433.33998mm per minute (RPM = Rotations Per Minute). We then multiply by 60 to get the distance travelled in an hour, which is 3,395,433.33998mm*60 = 203,726,000.3988mm/hour. Finally we convert this to KM which means we divide our result by 1,000,000, giving us a speed of 203,726,000.3988mm/hour÷1,000,000 = 203.7260003988km/hr, rounded to 203.7km/hour.
This of course ignores factors like the wind resistance on the theoretical vehicle, friction between the tire and road, and the weight of said vehicle, but this was still a fun thought experiment.
This is 126MPH for anyone used to Imperial measurements
2:19 Sounds like a fast motorcycle
2:25 Great sound, especially with headphones on.
Sounded like a real engine tbh
@@MilesOconner7161
I agree.
audi r8 it sounds
@@nitrousracer000
👍.
Lamborghini huracan?
0:32 when your car finally stars after 2 hours not knowing what broke
2:19 The sound is beautiful
Sounds a bit like old f1 car or superbike
Or like big chainsaw
Sounds more like one of the Lamborghinis
@@Rentta for me it sounds like a tuned gallardo engine
@@Windows77601 and like a Lamborghini huracan engine rev up
Definitely has to be a great representation of how gears work in vehicles, let alone pulley systems.
Just when I thought it can't go any faster he does something very creative 😀
2:15 WOOOOOOOW…………. That was so f cool!!!!!
Wow a Lego wheel louder than a motorcycle
2:38 terminal velocity but executed under other primitive energies
Hello boy, I would like to upload lego technic in my other lego channel, but how do I get motors, parts and everything? What is your tech kit?
That was really, really cool. It makes me think about how human tech is so advanced that a toy can be made to spin a thing faster than was probably even possible with state of the art tech what, 300 years ago?
I'd be interested in seeing how fast you can get the wheel to spin by hand, but continuously, maybe for about 30 seconds or so. Getting a high peak RPM is interesting, but using a rip cord design makes it impossible to maintain that speed once the string is exhausted.
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Just the hand alone reaches 1,700 RPM
The average vehicle idles around 1,000 RPM
Impressive
Reminds me of early helicopter ideas where there were just a bunch of dudes spinning a wheel really fast
Friction
At the 19’000 RPM mark, it kinda sounds like an Audi R8’s V10 engine!
It's cool how it spins so fast!
1:32 this is what a chainsaw sounds like
Or Motorcycle
Mom I need a 650cc bike
Mom: we already have a 650cc bike at home
The bike:
1:40 sounds like a Lamborghini huracan
Honda civic mfs at 3 in the morning: 2:26
truest thing I have seen today
This has convinced me that with enough gears and string we could have cars running on hand cranks but big oil wouldn't want us to figure that out
0:46 For some reason I have a sudden craving for Twizzlers...
Conclusion: human strong
With RPM reaching 1,700 just by spinning with your hand is quite impressive
2:22 i like how funny when the string just unplugged the lego gear
can you use the holes in large gears to make a thick axle that will not twist?
2:26
In slow motion, this feels like a WW2 fighter plane.
Stuff like this is why I gravitated towards engineering
1:46 engine lol 😂
low rpm yaris 😂
0:40 im curious if it can be used for a generator?
It definitely can, if you have it connected to a generator that sustains tens of thousands of rpm, then yes, you could.
*Still waiting for a kid says"This isnt real sound, u use Supra sound for this"
This is a neat twist to the spin a wheel challenge! Really brought joy to my night
Would there be a way to reinforce the input shaft? Perhaps could make hand turning get a little further
He has (or at least had) a steel one.
I think you could hit 20k rpm if you made the construction more sturdy, I've noticed that with a couple of your builds, that things are vibrating quite a lot.
For the string and lube tremendously gives me beyblade vibes, for the ones who doesn’t know (the string and lube) actually works like a string launcher in beyblade, sheesh I wish I could see a beyblade launch with the use of lego. Your videos are amazing!
2:22 Impressive 🔥
Question: what if you made the string longer?
You'd need to pull more, which could decrease the speed, as your hand can move faster for short distances, but slower for longer distances.
"Let it Rip" Moment
HONEY, WAKE UP!! NEW BRICK EXPERIMENT CHANNEL VIDEO!!
I feel like you could potentially hit the speed of sound at the edge of a large wheel.
At 20k rpm you'd need about a 33cm diameter wheel.
Not sure how feasible it would be to make the whole thing out of lego, tho.
Maybe steel axels, gears and supports but then I suppose eit kinda defeats the purpose of being made relatively easily using lego. Still would be cool too see
Nah, it already is way beyond speed of sound. Sound is moving by 340m/s, so 34.000cm divided by 20.000 RPM = 1,7cm circumference per rotation would already be enough. 1,7cm divided by π = 0,54cm diameter of the wheel
@@philruu you're confusing rpm with Hz.
20k rpm is 333.3Hz
At 333.3Hz you need a perimeter of 340/333.3=1.02m to reach the speed of sound
This gets us a radius of 1.02/(2pi)=0.162m, which is a diameter of 32cm.
@@jogadorjnc makes sense, I thought 1 wheel revolution would pass the total distance of its circumference at the edge
@@philruu it does, but 20k rpm is 20k revolutions per minute, not per second.
I never thought Lego could sound this awesome
0:19 sounds like lamborghini aventador