How NASA Reinvented The Wheel - Shape Memory Alloys

[@johnnybadboy3475]

I can’t believe you got sponsored by such a prestigious organization. Great job!

[@ankush-kl2nf]

ikr

[@armorsmith43]

JohnnyDaPrankstaGangsta I bet he got a bunch of folks there arguing about spitfire design trade-offs and sharing the video.

[@br0th3rtub34]

Ikr

[@br0th3rtub34]

straw barrow JINX

[@dziban303]

Yawn

[@Freakeasy_chicago]

Considering curiosity has gone more than 7 years past it’s predicted lifespan, I’d say they did a pretty good job on the wheels

[@merxellus1456]

It is never enough

[@Hairyson-g5j]

Minimonk if u think about it most car tires won’t last that long

[@codzy2850]

@@Hairyson-g5j yeah but a car drives thousands and thousand of km on one pair of tires and the mars rover only travled 40km

[@no_t1es]

@Codzy yeah but the terrain on mars is way different from ours, and because of the incredibly different temperatures at day and at night, you shouldn't even compare it to a normal car tire

[@greengreen110]

they could've done better, you can always do better

[@namenamename390]

Royal Air Force? That's an interesting way to spell squarespace...

[@TheWeeky]

*T H I S V I D E O I S S P O N S O R E D B Y S Q A R E S P A C E*

[@3DegreesNorth638]

Lol

[@zlozlozlo]

That's not how you spell brilliant.org

[@Cythil]

proof that marking works ;)

[@namenamename390]

@Nostalgia For Infinity joke's on you, we still don't buy the products...

[@akg_table]

3:45 jesus can you imagine having the memory of riding a dune buggy on the moon? nobody can top that

[@reed8462]

Cziffra I was dead serious thinking the same thing 😂 that would be crazy

[@pretinhobasico6539]

and those MF thinking nice ride on Lambo.

[@Malohdek]

Man I was straight up laughing saying "That man is living his best fucking life".

[@SeaJay_Oceans]

Drinking a Beer, On Mars. :-)

[@shaunbanda6728]

Why would Jesus ever imagine that....

[@randomperson1614]

So you just got sponsored by the RAF and BAC!! That's that's insane

[@wolf2109]

Random Person the royal air force..lmaooo..what a joke..just bcuz u have ROYAL in front of the name doesnt mean youre special. USA by far has the best pilots

[@josewarren1441]

@@wolf2109 The fuck? When did this become RAF vs USAF?

[@carlose6010]

@@josewarren1441 He's from the USA. Thier brainwashed to believe thier better in every way.. to the rest of the world 😂.

[@wolf2109]

Tempest it didnt. Im just making sure he doesnt spread fake news, my nigga

[@temiajuwon8893]

@@carlose6010 They're *

[@Chris.Davies]

It does NOT use a nuclear reactor to power itself. It uses an RTG - a Radio Thermal Generator, which converts the heat from a decaying 5-kilo slug of plutonium into electricity using peltier devices. It is not very fancy, has no moving parts, and is very reliable, but low power, at less than 110 watts total output.

[@RealEngineering]

That’s actually way cooler. Thanks for correcting me. Want to read more about that now

[@johnspraggs1115]

Radioisotope Thermal Generator, actually. No radios involved in an RTG.

[@lazeroussdomain5862]

Wanted to say exactly this. An RTG is quite different than an actual reactor.

[@TwilightMysts]

I thought it was a little suspicious when he said "nuclear reactor". Thank you for the clarification.

[@Sam-th4jl]

actually RTG stands for radioisotope thermoelectric generator

[@johnnybadboy3475]

I met Dr. John Grant at the National Air and Space museum, and witnessed a teleconference where they decided where to move the Curiosity. It was an amazing experience, and this just adds to it.

[@HK-sw3vi]

did you also see the screen that showed what the rover was looking at?

[@gibson1005]

witnessed the same kind of teleconference from the CNES in France, the french team is in charge of several instrumentals on the rover, and they were discussing wether or not they would use it this night with the engineering team around the world. It was amazing to witness such an international feat taking place right in front of me

[@aryankhan1599]

Yea they do that

[@johnsheppard2456]

Dude I read that name and my dumb ass thought you were talking about that Jurassic Park guy... The dude who waved at a dinosaur with a flare and almost got crushed by a car falling from a tree... yeah that raptorology dude, Dr Alan Pepper. Lol Jk I know it's Dr. Grant. But bruh if his middle name was pepper can you imagine how hilarious it would be to call him by his full name? Nobody would ever take it seriously. But they'll have a good laugh for sure.

[@SirSmithThe1st]

My Aero class presented our senior design project at JPL last march and we got to speak with one of the mobility engineers for the Mars 2020 Rover. They told us that there were two main flaws with the old wheels: the grousers (treads), and the placement of where the hub attached to the wheel. For the grousers, their design was to give better traction by increasing the length of the grouser, which is why it’s zig-zagged. Consequently, having those ‘zig-zags’ meant that all the stress from the rover’s mass was concentrated at the vertices of the grousers, and if the force was high enough the stress concentration would puncture the wheel frame. For the placement of the wheel on the hub, it was mounted offset from the center (laterally, not axially), so that the wheels extended out a bit further from the rover chassis and suspension system. This was an issue, because it basically meant the exterior rim (the part of the wheel that’s furthest from the rover) wasn’t being properly supported, and the forces on it were like the forces on a cantilever beam. This causes it to bend slightly, and over time this constant bending fatigued the wheels, adding more to the damage caused by the grousers. For the 2020 rover, they plan on using similar wheels to Curiosity but with the hub mounted in the center of the wheel, and using a sinusoidal grouser pattern rather than a zig-zag.

[@killernat1234]

The episode of wheel engineering...

[@TheJttv]

This*

[@Frediloc8]

Ok, this actually made me laugh.

[@rohanshekhawat2071]

Get out

[@Senor_potato]

@@TheJttv this'nt

[@pomodorino1766]

😑 😂

[@xanderlowe8704]

It's crazy how just simple everyday things on Earth are so different in space and it really just makes everything harder

[@rinalds1620]

Its not crazy...

[@piranha031091]

@@SandraWantsCoke Yes, some astronauts who have experienced zero-g did report harder erections. This is thought to be due to fluid shifts throughout the body.

[@damiengrey2297]

I've heard dying is pretty easy to achieve in space though.

[@GrayFlare]

I can't believe you just assigned homework to all your viewers xD

[@GrayFlare]

I'm in the U.S. so I can't participate but I hope you get some awesome submissions RE!

[@HOHO-iw1vn]

@@GrayFlare I was gonna turn it in, but my dog ate it.

[@YM-zf8mt]

totally agree "Basically invent what could be the future of the wheel, a revolutionizing concept that could change space exploration and maybe even our current tech on earth" "what's the pay ?" "you get work experience while we make a profit out of your idea" capitalism really is a great thing isn't it ? why don't we... i don't know, pay a team of engineer to do this ? instead of giving dividends to wankers who do nothing but wank off of their inheritance ?

[@abhishek3667]

I had finished it but I left it in home.

[@nilsgensert5814]

2:35 "It employs a nuclear reactor for power." Don't you mean nuclear GENERATOR? Because it's a big difference. A reactor runs on controlled fission, whereas a generator just uses the heat of natural radioactive decay.

[@calinwin445]

Whoah

[@Babalooza]

normally id tell you to fuck off with that pedantic shit but that's actually a very big difference.

[@veerailau]

No it’s a reactor I worked on curiosity and was part of the team that built the reactor.

[@cacasplat3]

@@veerailau no you didn't, stop lying to get likes on the internet.. The rover is powered by an RTG (radioisotope thermoelectric generator).

[@veerailau]

@@cacasplat3 what’s your proof

[@Dia1Up]

I've had Nitinol glasses for years (they were FAR too expensive), I've closed them in binders, I hit them with a chair, and sat I them a million times they still look like new. These wheels are amazing. I'm actually surprised it wasn't thought if sooner. But then again I never put 2 and 2 together either. Awesome

[@-smp-scientificmethodpersp838]

SeenCreaTive I agree. I was surprised that this is considered new news. I'd expect the greatest scientific researchers on Earth to have thought of this before. Maybe they have, but it was too expensive to develop? That can't be it. Yeah, I don't get it.

[@dakotaraptor5918]

Technology is amazing, my dad always says “we are living in the future” and to that I can agree after seeing a metal that can re-mould it’s self so easily

[@dumpeeplarfunny]

*itself

[@aaron41]

Awesome video! As a material scientist who works with this stuff every day, I'm pretty sure I couldn't have explained it any better.

[@utiogul]

Oh, great! Do you work with shape memory alloys?

[@shitboxoffroad]

Currently in school for materials science any advice?:)

[@aaron41]

@InnerG don't be like me... Do your homework :P

[@aaron41]

@utiogul Not personally. I do 3D printing of metals, but the SMA group is in my building, and I help them out sometimes.

[@shitboxoffroad]

@@aaron41 damnit I'm already like you lol

[@MaxBrix]

How NASA reinvents the wheel - Goodyear invents a new tire.

[@pencilgaming1233]

2032: "How NASA reinvented the car"

[@BURDYMAN777]

How Goodyear* reengineered* the wheel. And for the people saying they only "reinvented" the tire, a wheel is a tire AND a rim.

@@BURDYMAN777 the rim is the wheel wagons didn't have tires but they were still wheels.

[@manishpanchpal1376]

So does Michelin,Appolo,Continental and the rest the race is heating up

[@MrT------5743]

@@BURDYMAN777 Yep you are correct. The word tire comes from attire as in a wheel's dressing.

[@DomyTheMad420]

Honestly, out of all innovations; new Materials being developed have always amazed me the most. It's like... Unlocked a whole new type of block for your Lego set. So awesome!

[@zeevyehuda2501]

As someone who just finished a metallurgy-focused materials science course for his major, I loved your explanation of Nitinol and it's the coolest thing

[@user-zw3iu5hx1d]

"This material remembers it's original shape. Here's how it works: ... When it cools down, it remembers it's original shape and returns to it"

[@menthasis4798]

lol

[@CieJe.Alexander]

Humans: Holidays = under stress (severe anxiety) the body returns to its original shape (fetus position) Then stress and strain ends (holidays end) the body stretches and goes where it wants to in shapes of its own choosing.

[@sumyunguy6894]

Robert Hahn lol yup

[@intellectracoon]

@@CieJe.Alexander i expand in holidays then get back to my original shape afterwards.

[@CieJe.Alexander]

@@intellectracoonlol yeah that too.

[@wiwbiz2]

Man, if you ask this guy to promote a jar of jam, he'll make it so serious that you'll think you're not eating jam ,but something like accomplishment of humans' imagination on reinventing the taste structure of fruits. Damn it feels so serious..

[@DecemberGalaxy0]

No! he is so articulate; presenting us with valuable information in serious manner adds to how much effort and corporation is needed in such missions.

[@abdurrazzak305]

To be honest you seem articulate yourself

[@DrakeShattuck]

How NASA Reinvented the TIRE.

[@hemantkharkongor5433]

Exactly ..they did not reinvent the wheel

[@davidfortier6976]

Absolutely correct, I was about to say the same thing myself.

[@Sketch1994]

How Goodyear reinvented the tire...

[@TristanJCumpole]

Dare I say "tyre" here?

[@SeaJay_Oceans]

You mean the Tyre ? :-)

[@Malamockq]

2:36 No it doesn't have a nuclear reactor... it has a Radioisotope thermoelectric generator or RTG for power. RTGs use an atomic battery which converts decay heat into electricity but the heat produced is from radioactive decay, NOT a fission chain reaction as in a nuclear reactor.

[@BeCurieUs]

Interestingly enough, the distinction there isn't huge. MOST of the energy from a fission reaction is from the kinetic energy of the 2 fission products. This is actually similar to the alpha emissions from decay of Pu238. Fission, technically, is a form of radioactive decay. Some materials even have significant spontaneous fission rates. While us in the biz still prefer calling them generators or batteries rather than reactors, their are subtleties enough to nod your head and excuse it for lay people.

[@Malamockq]

"Interestingly enough, the distinction there isn't huge." HELL NO. The distinction is huge. In the energy released total and power, which in fission is immense while radioactive decay is comparatively low, and also in the vastly different energy producing processes that I explained already. "MOST of the energy from a fission reaction is from the kinetic energy of the 2 fission products." Wrong. The vast majority of energy from fission is released in the form of energetic x-rays. "Fission, technically, is a form of radioactive decay." No it's not. Fission is a chain reaction. You do not know what you are talking about.

[@Liindir]

en.wikipedia.org/wiki/Nuclear_fission I love how literally no one can read one single freaking line before acting like a humongous anti-vaxxer.

[@BeCurieUs]

So, for fission about 160 MeV are from the kinetic energy of the particles, while only about 14 MeV are from gamma emissions (xrays need not apply). in all, when you include beta decays and losses from neutrinos, about 80% of total fission energy is from the kinetic energy of the particles. This is how reactors work at all as if most of the energy were from photon emissions it would be easy to make reactors that directly convert this energy to electricity rather than using the heat to generate steam to generate electricity. In every single one of my nuclear engineering textbooks, fission is referred to as a type of decay. This is because fission happens spontaneously already, we are just inducing it via a neutron absorption. There is no chain reaction, so that much is true, and the volume of power per reaction is also smaller, but the method of extracting the energy is very similar (thermally). Of course they are using thermocouples rather than other thermodynamic cycles, but they are more brethren than they are anything else. The process might be different but the end result is rather similar. Fission is volumes more intense and involves a chain reaction, but is still about harnessing heat from nuclear decay processes, namely fission vs alpha decay.

[@BeCurieUs]

I just ran a twitter poll and it seems like this is a common misconception, that nuclear reactions are mainly emitting photons! Fascinating!

[@adolfhitmaker8639]

I hope they make cars from memory metal one day. Oh some A-hole ran a red light and dented your door? Toss some hot water on that baby and BLAMO - car fixed

[@hah-vj7hc]

How would they make profit then? Gasoline isn't a good fuel, either. Humanity sucks for being wasteful -.-

[@thedesk954]

Me: How good is it? NASA: It is wheely good.

[@pencilgaming1233]

I hate that I laughed at this

[@Crookqt]

hahahahah :D

[@davethegreat7339]

it's such a bad joke that's it has become funny. the internet has damaged the part of my brain eich decided on humor.

[@oxcart4172]

...said a spokesperson!

[@williamapodaca8614]

It's so futuristic and medieval, it's memory metal chainmail

[@lifesimulator3964]

A COMPETITION!? Just go to KSP!

[@linecraftman3907]

>inb4 someone suggest antigravity repulsors

[@iforce2d]

8:08 hersh mershan environment?? :)

[@HritwRaje]

I thought I was the only one to notice that.

[@markgearing]

iforce2d - c'mon mate, you're a kiwi. Your entire country only uses one vowel - 'uh'.

[@NickRoman]

Get in the caaaaer! The maershan caer.

[@neilgb14]

Never heard an Irish accent before?

[@Anvilshock]

Oirish?

[@ltr4300]

Point of order: It does not have a nuclear reactor. It has an RTG. One works by splitting atoms to heat water, which makes high pressure steam which is then run through a turbine to create electricity... The other just soaks up natural decay heat and turns it directly into electricity.

[@caffeecup5319]

Early BC -Wheels 2019 -Spring Tires 2050 -Floating wheels

[@CannedSoup602]

3000 - Floating seats

[@bkl3893]

Shall i say it and r/whoosh myself?

[@JKirbyD]

Floating wheels 2050 Either Floating like flying or Floating coz all ice melted.

[@bkl3893]

@@JKirbyD nobody asked u

[@wolfenwingsable]

Still waiting on hover cars

[@1schwererziehbar1]

Why not build wheels made of Nokia phones?

[@anvutrong6870]

II NASA: You have been hired

[@trytwicelikemice7516]

Don't want to damage Mars too much

[@derpythanos2064]

They should have both nokia and flex tape as protection!

[@kornkernel2232]

They needs wheels, not rock crusher.

[@I.Fumblebee.I]

Weight :/ you didn't think they'd have thought of that?

[@fireaza]

I had no idea how big the Mars rover was until I saw it in VR. I always figured it was about the size of a large RC car, but it's HUGE!

[@tiagotiagot]

It's the biggest one so far, as far as I know; the older ones were closer to the size you were expecting.

[@Alucard-gt1zf]

TiagoTiago nope curiosity is only marginally larger than the others it’s just much heavier

[@tiagotiagot]

Alucard i.redd.it/axr1p30xcgb01.jpg

[@tiagotiagot]

Alucard Also this: www.jpl.nasa.gov/infographics/uploads/infographics/full/10889.png

[@kermitthemutantlevitatingf7836]

disappointing that this wasn't on Perseverance

[@rullestaden]

But will it blend?

[@BrevityBuzz]

This is an og

[@CannedSoup602]

*loud metallic scraping* “Doesn’t seem like it will, shall we use turbo?” *Jet turbine starts up*

[@panzerdragon1121]

Just use flextape and nokias, there, indestructible.

[@WellBeSerious12]

Nokia/Duct Tape (NokiaDuct) Tires.

[@Skinnypole_clara]

Please think like an adult and not with a 5 y/o kid's brain

[@ericcl5313]

*Found the genius ^*

[@markcangila1613]

@@Skinnypole_clara Please think like a human, not a robot

[@IvanSN]

@@Skinnypole_clara Please kindly fuck off. :)

[@masterchief416]

This is why I love material science. Thank you so much for this amazing video real engineering.

[@samuelyap9367]

although you don’t have many subscribers, you are a jewel to us who look forward to learning something new with every video. Thank you, and please never stop

[@barthurs99]

Nat many subscribers? No offense, but he has 2.5 million subscribers.

[@hah-vj7hc]

@@barthurs99 Did he get all of those within less than a year? I should make my own science channel maybe...

[@diveant]

The wheels on the Rover go round and round...

[@Mrbfgray]

Just not very far.

[@mikem.8699]

SpaceX: Joins the chat SpaceX: Wheels?! Where we’re going, We don’t need wheels.

[@ZebuNeutrality]

I like the Back To The Future reference

[@nathangamble125]

Shape memory alloys are so crazy. I remember in science class when our teacher wound a shape-memory alloy wire into a bundle, then dropped it into hot water, and it immediately popped back into a straight line and jumped out of the water.

[@pax4370]

What course are u persuing? Material science?

[@gibdopaminepls]

my brain is a shame memory alloy

[@nathangamble125]

It was in a secondary school chemistry class. I can't remember exactly what the topic was though. We had some really cool teachers who would sometimes do science demos which weren't always relevant to what we were learning. It was fun.

[@pax4370]

Wow...

[@Hartfeltet]

08:09 hersh mersh environment

[@Real_MisterSir]

I couldn't stop giggling at that xD

[@jhennaagotilla8266]

Hahaha but... 32 likes for 2 years? 🤔🤔

[@kalasag9113]

I don't understand how he can pronounce "M-ANY" but can't straighten his tongue out to pronounce "M-arsE." LOL!

[@alneez2010]

It's funny how you say Mars (Murrs). But really informative video.

[@MaxJNorman]

Hearning someone from Northern Ireland say 'mirror' is a special treat. "Have a look in the mrrrrrr."

[@BardhAzizi]

i can't unhear this now :D, thanks :P

[@pax4370]

@• A S T R O N A U T • 😂😂

[@3poli]

i fing it amusing when he says "car" Curr

[@sebsmith5100]

You literally got sponsored by the British air force?

[@z3lop59]

Royal Air Force.

[@slcarsuk]

Get the name right dumbass

[@paraweld9838]

Villainous foreigner well I mean it’s right both ways I’m pretty sure, the Royal Air Force is Britain’s Air Force hence the British Air Force?

[@chad_bro_chill]

Semantic as fuck, m8. Britain has an air force. That makes it a British air force, called the Royal Air Force. You're not going to see Americans sperg that hard if you called ours the American Air Force, because it's pretty obvious you mean the US Air Force.

[@slcarsuk]

Chad BroChill no dumb fuck the name is the Royal Air Force. Is not semantic. There is no such thing as the British Air Force. It’s the Royal Air Force. It was the RAF that fought the Battle of Britain. You don’t call the sas the bas. You don’t call navy seals the navy penguins. Respect the history respect the name

[@MurkyShallows]

and the perseverance rover was like, nah, im good

[@theaslam9758]

Dude, veritasium stole your title

[@Dumify]

They also got like 5,1M views in 4 days and this got 5 M in 4 years

[@duckpotat9818]

Curiosity rover doesn't have a nuclear reactor, it's has a RTG.

[@rahulsrinivas497]

Vikrant Rai what’s the difference ?

[@willinwoods]

Good point Vikrant, but I'd guess it won't matter all that much to the person in the street. Nuclear-shmuclear. ;)

[@dubsy1026]

@@rahulsrinivas497 nuclear reactors use nuclear reactions to produce heat, which then boils water to drive a turbine. RTGs use decay heat to create a thermoelectric effect.

[@bloogaming8827]

A nuclear reactor uses enough of the radioactive active material (critical mass) to start a chain reaction called fission. This is basically a nuke going off really slowly. Using the heat produced it boils water drives turbines with the steam. The RTG in Curiosity does not have enough of the radioactive material to start the chain reaction. Instead, it captures the passive radiation coming off a piece of plutonium and converts that to electricity.

[@Zarcondeegrissom]

via thermal-electric-couples, yeah. I can understand the confusion as in the simplest of terms they both use radioactive stuff for heat.

[@luxurious0346]

Ahh, opportunity's grand children. May you continue the faithful mission

[@MyKeeper88]

This is awesome because I am currently on the last book of Kim Stanley Robinson's Red mars series. Great video. Keep it up.

[@mww.7980]

It’s 4:13 am and instead of getting sleep I’m watching real engineering. Life is great!

[@toad3222]

4:52 for me lmao

[@woxof46]

This video is NOT sponsored by Brilliant OR Skillshare? Ya messin' with my marbles here man!

[@theholderscock]

Ikr

[@Jack-tu5zf]

Its not reinventing the wheel... Just the tire

[@Galactipod]

No one asked.

[@thestonedraider8684]

Galactipod nobody asked you be a ass, but there you are.

[@challengeaccepted8835]

The Stoned Raider ouch

[@jackrush1222]

I mean they used a different rim than the regular ones did they? I''m pretty sure they didn't discuss the rim part because it's not really the one that's the issue but pretty sure they gotta change the rim in order to get that tire to work.

[@lithobreak3812]

In car culture wheel can mean the tire plus the rim

[@mohamed11322]

He says "mars" like a frikken pirate bruh

[@damejelyas]

ay

[@taipanforce4909]

It’s an accent

[@ryckjunior9911]

I wonder why stereotypical pirates always have Irish accents.

[@blanco7726]

Oom Tier I imagine a stereotypical with a Somalian accent personally

[@BJ-ln1dz]

Maers

[@armandodane4588]

This Video should be titled: How Goodyear Reinvented The Wheel - Shape Memory Alloys Give credit where credit is due...

[@Rayray-kr8xm]

armando dane How NASA let Goodyear make a better version of a tire*

[@agoradacerto]

There is no research without anyone paying for it.

[@ironicdivinemandatestan4262]

@@agoradacerto The guy that made insulin wanted for it to be free. Jonas Salk made his life-saving polio vaccine for free. People can be motivated by things other than profit.

[@uwukiepookiebear]

@@ironicdivinemandatestan4262 yes but money is needed to carry out research

[@jeltje50]

@@agoradacerto by that logic: "tax payers let Goodyear reinvent the wheel".

[@-Jed]

8:09 Where does this Hersh-Mershen -environment occur?

[@guitargeometry]

In mersh

[@seanpower1090]

Whal den.. I'd soopose dat iksplens dat.

[@OlejzMaku]

Radioisotope thermoelectric generator isn't a nuclear reactor.

[@visibleconfusion9894]

it still uses nuclear material to produce power

[@-ragingpotato-937]

Close enough for anyone to get the idea of whats going on.

[@vill007b3]

"I am so smart"

[@11235811193049]

It generates power via nuclear decay, so for your average person watching this video it is an easier and still fairly accurate description.

[@OlejzMaku]

I don't usually argue semantics, but my point is that reactor is device that contains and controls some sort of a reaction. RTG uses heat from spontaneous nuclear decay to generate electricity. You don't need to engineer anything to make plutonium decay. It is spontaneous.

[@MDZPNMD]

Great video, the quality of the videos is getting better and better, thanks for putting in the references.

[@TommoCarroll]

Completely agree! Happy to see the improvements!

[@4492huzaifa]

I just can't stop noticing the way he says "Mers" :-D

[@acordarhoje]

preparing for new pandemics

[@ryanm.191]

Congrats on such an amazing sponsorship

[@Nyerguds]

Okay, but how will it deal with small rocks getting stuck in the springs?

[@CT--sy8sy]

Perhaps in the rim you could have an air hose. As the tire rotates, air is released to blow the stuck particles.

[@maffytaffy1914]

Dumb question such a simole problem. Tons of engineers works for nasa and you thing they didn't thought of that?

[@CT--sy8sy]

maffy taffy - he was just asking a question. One can always gain more knowledge. You didn’t even attempt to answer. You just said it’s been answered. If they have thought of it, why don’t you share their solution?

[@maffytaffy1914]

@@CT--sy8sy you just did.

[@HypercaffinatedBees]

maffy taffy - that does not validate you being rude and degrading.

[@Tonitasso]

8:08 That hersh mershian damn

[@torantrichler2098]

“How nasa reinvented the wheel” ... “the wheel will never be reinvented”

[@bigredc222]

There are wheels that aren't round, doesn't that count as re invented?

[@torantrichler2098]

C Smith completely out of context but ok

[@dumpeeplarfunny]

They didn't reinvent the wheel, they reinvented the tire. Also, for the record, the wheel is not as simple as people think. It's nothing without an axle, and doesn't work nearly as well without bearings.

[@nathanjohnson9464]

It's just clickbait, you are really overthinking this

[@Invictus173]

Tyre*

[@multi-colorman5952]

Nathan Johnson you are the example of someone braindead.

[@ex5080]

Damn Vertasium really just ripped mostly everything from this video, just spent more money to interview people in person

[@frisbeephil]

I'm surprised there was no sand/granular materials in the testing videos. It would be interesting to see how much this experimental wheel retains.

[@lucyluzeng5344]

7:45 " When the stress passes a threshold it actually causes the lattice to transform to austenite. And when the stress is released it returns to martensite." Doesn't stress transform the austenitic phase to martensite, and when stress is released it returns back to austenite instead of the other way around as explained in this video? Austenite phase is the parent phase and martensite phase is the daughter phase (this forms the twinned martensite lattice).

[@hah-vj7hc]

You're smart. I like that :)

[@reemnasser9105]

I was about to leave such a comment. I wonder aren't these videos reviewed before being posted!!

[@kejunhu5803]

exactly, is Austenite -> Martensite due to applied load and reverse transformation due to unloading.

[@madnessbydesignVria]

What prevents the accumulation of dirt and rocks inside the tire? It seems like it wouldn't take long before it would be full of debris that would increase the weight, and start to wear at the metal fibers (getting wedged into the gaps, and preventing the fibers from elastically reshaping). I assumed the Curiosity's tires were open-sided to allow this kind of debris to simply 'roll out'...

[@josephjackson1956]

One problem with using a fairly large amount of titanium in everyday items on Earth... Titanium is expensive

[@cosmicaverage3986]

Its also flammable

[@-smp-scientificmethodpersp838]

They're sending our resources to Mars to stay lol like "there goes some precious metal we'll never get back" sorry Earth, less resources for you lol even though I do support this project, it's interesting to realize

[@seraphina985]

+scientific method perspective On the other hand once we stop dragging our feet with half assed insignificant little trips to space and start actually using it there is way way more of it easily accessible above our heads than bellow our feet. Main problem is we are still so obsessed with looking down for resources when most of them are in the opposite direction.

[@1zui]

Shape memory alloys are actually quite cost effective compared to other actuators. That´s one reason why they are widely used in mobile phone cameras. Don´t you think that are everyday items? ;)

[@seraphina985]

@Daniel U I don't think that they were talking about arbitrary costs in human imaginary units (currency) but actual physical material resources being shipped off world. Still I don't personally see the issue if it slowly works towards humanity waking up and smelling to coffee so to speak when it comes to the fact that same technology can be used to ship resources from any of the countless other chunks of rock to spacebourne manufacturing stations or even to Earth itself. If anything it would just be a downpayment on R&D along the road to developing that vast wealth that is just waiting for us to stop being lazy and get to work on making use of. Doesn't seem that there is anyone else going to get around to using it at the moment so lets stop letting it all go to waste, that is a whole hell of a lot of matter out there serving no practical purposes, only enough to make a few quadrillion (ok many quadrillion but whatever) moderately large rocks like the one we keep resting all our efforts on (Earth).

[@nickvoutsas5144]

3D printing will become an important factor in repair and development of components on Mars

[@damiengrey2297]

3D printing will become an important factor in repair and development of components on Earth as well.

[@fakecubed]

I believe 3D printing is already being used on the International Space Station. It would be good to have for any long-term journey away from Earth, and it will be downright essential for colonizing other worlds.

[@Foomba]

In the 1980's, I met the guy who helped design the lunar rover wheels. He came by my father in-laws auto mechanic shop with a relative who I knew. He was very curious and took notes the whole time he was at the shop. Not sure what the notes contained. I had no idea of the lunar wheels construction until watching your video.

[@adjagosse]

Plutonium battery, not nuclear reactor.

[@temiajuwon8893]

RTG yeah

[@cassgraham7058]

That's a good way to describe it in the same word length... and understandable for people that don't get the difference between fission and radioactive decay

[@thatoneguy444]

They did not reinvent the wheel... they improved it.

[@TheSunriseAnimation]

And it isnt even nasa its the other company...

[@thatoneguy444]

@@TheSunriseAnimation yep

[@AndyChamberlainMusic]

What does reinvent mean if not to make a drastic improvement on an existing technology...?

[@thatoneguy444]

@@AndyChamberlainMusic well.... i can't get away with anything can i?

[@Moosetraks21]

still round

[@ao1645]

“Haarsh maarshan environment!” :-)

[@stvtv9475]

Finally a science video which uses proper metric system

[@miraflynn8935]

Rip Oppy and its incredible journey

[@kodaco29]

maers

[@Muffincaek]

Just had to look for someone else thinking about it!

[@RenoYeh]

Murphhhhhh

[@the486kgman2]

JL MÆRS

[@kiyoshim9593]

How cheap titanium wheels. LoL. Why dont we reinvent our cars with titanium nickel alloys

[@clefmonnaadipuo6016]

😂😂😂😂😂😂

[@spongspong5720]

4:54 "nothing is magic in this world and everything has an explanation" :'-(

[@hah-vj7hc]

If you don't understand it, it's basically magic

[@pineapplejuice1109]

*every kid and magician felt that*

[@jeraldineqlouiserobbert7581]

Always One Man Standing ... @MARS & Thank You So Much From A Human On Earth & x ,.

[@FTSsjc]

Tough place this Meerrrrrrhs, almost as tough as Mars

[@napoleonibonaparte7198]

Toyota Corolla’s future rims for the 2019 version.

[@briangicharu2899]

I wanna learn planetary photoshopping to secure a job with NASA

[@basedoppenheimer1497]

I thought Metal Gear Solid Twin Snakes' Shape Memory Alloy card was some sci-fi cool concept. Guess I underestimated them. This is epic stuff. So cool this was made.

[@NotSomeJustinWithoutAMoustache]

How do you feel knowing Derek from Veritasiumstole this same exact video??

[@LeoStaley]

Normally edu youtubers get scooped by veritasium, (he does their idea first) and call it getting Dereked. What a strange reversal.

[@jakish1985]

Veratasium basically redid this video... for some reason

[@clicky5494]

Veritasium turned into kakashi the copy ninja real quick 💀

[@ritishify]

This is awesome, I guess it's official then. I got Veritasium's video recommended and searched for "nasa wheels", then found this video lmao. Didn't even watch theirs (also just downvoted it).

[@patrickr9716]

I'm really happy to see how your videos have improved over time. You speak really fast in this one and it can be a bit much. You have really honed your craft over the years.

[@onlyonSiMPLE]

on "mers"

[@danielkron2513]

thecc

[@wildwisdom1361]

Can u make a video on how radio communication works how pcb of communication works how we controle a satallite all type of communication plz this topic deserve some video

[@pizdamatii5001]

"[curiosity] employs a nuclear reactor for power..." i think that calling the MMRTG a 'nuclear reactor' is a bit misleading. while a radioisotope thermolelectric generator does use radioactive decay to generate heat (that is turned into electricity through a thermocouple), they are very different from what people generally mean by 'nuclear reactor'. incidentally, nasa has developed in the past compact and lightweight reactors (look up 'SAFE-400') - though this was still quite a bit heavier than curiosity's RTG.

[@Skymaster.47]

Sponsored by the RAF. Real Engineering, you rock.

[@anthonymarquez6493]

I need more real engineering

[@Moe3ter]

Before watching: yeah, yeah... just another clickbait advertising a new material, give me something new plz. 7:43 WE ARE LIVING IN THE FUTURE!

[@daarling4u]

Invention of wheel is the biggest thing ever happened to human kind

[@Excellent226002]

your mom is si fat that sheis biggest thing ever happened to human kind

[@sammysaito529]

Peter Parker What about fire?

[@sammysaito529]

Moha Amip Welcome to the Internet

[@amit4Bihar]

Or Fire?

[@watwat2540]

You deserve these partnerships, Great Job

[@chengong388]

But it’s not really reinventing the wheel, more like reinventing the mesh tire.

[@jokinglimitreached1503]

The mesh tire is not a wheel? Are cars then also not on wheels but on tires? It's the same.

[@brianmiller1077]

The wheel is the hub + the rim, the tire is the rubber part.

[@matijarasovic1519]

Thats a great tite for a video isnt it

[@temiajuwon8893]

@@brianmiller1077 That's also changed to properly support the mesh so...

[@chengong388]

Making the wheel out of a different material is not reinventing the wheel. Maybe that will be easier to understand. Just like how iron swords are still swords, nobody considers iron swords a reinvention of the sword. Even more extreme examples like automatic guns aren't reinventions of the gun. You need at least a railgun to qualify as "reinventing" a gun. In the same way, it's not "reinventing" the wheel unless you can some how change the basic principle of rolling a cylinder on the ground.

[@liq2029]

Writers: "So, has anyone listened to the narrator's rendition of our piece?" Narrator: "Meerrrrrrhs"

[@dansanders173]

And here, we realise the chance we all missed of making a video on the new f-35....

[@Alucard-gt1zf]

Sanzhere “new”

[@dansanders173]

Alucard It’s new to the RAF

[@sumitkrips2018]

The way you say MARS is really something

[@jedrudolph3128]

I think it's worth noting that this 1 tonne (assuming metric) vehicle would be roughly 400 KG on mars (roughly 0.4 Tonnes).

[@insolentish4529]

Good point. Totally didn't think of that

[@vidyajamesu]

To be fair, when you're dealing with one-time opportunities (GET IT?) it's generally better to be overprepared than underprepared.

[@jfdd43]

I wonder if this metal could be used in bullets. The heat of impact causes the bullet to automatically reform their shape. Allowing them to go through more armour without stopping

[@Ethan-rz6cx]

jfdd43 don’t tell the us military this

[@firstNamelastName-ho6lv]

Well if it was made out of mesh, then it might be too light to hold much kinetic energy, making it much less lethal. Lead is heavy and cheap.

[@padraigobroin370]

Goodyear Reinvented the wheel

[@my3dviews]

The tire, not the wheel :-)

[@no_t1es]

this is exactly why I'm subscribed to your channel