How Does NASA Practice Landing on the Moon? - Smarter Every Day 252

[@smartereveryday]

A huge thank you to everyone who supports on Patreon at www.patreon.com/smartereveryday!

[@NegetiveRizz]

o_O

[@princesslemmy]

👌

[@princesslemmy]

@@ikshwakgannoju2519 that don't matter

[@magistermilitum6575]

Sir, may I ask you a question? Lately you've been making videos about lunar landers and submarines, what are your thoughts on those topics and were the videos fun to make?

[@efjayadi]

you're welcome

[@Pwn3dbyth3n00b]

Imagine the dedication it takes to have footage from 8 years ago and holding it just for the perfect video to put it in.

[@rodchitate]

What's amazing is that the video looks like it was recorded yesterday (the quality is quite good)

[@mizzshortie907]

Exactly why I am and will be a long term subscriber

[@carmp3fan]

There are videos about him getting a 45drives server for storing all the video. It’s not all that surprising.

[@jared7606]

I think NASA didn't let him publish the video before. So imagine calling NASA for 8 years to ask whether it's ok to publish this yet.

[@hanro7430]

Or he founded the footage again and decided to make a video about it

[@MaNNeRz91]

"so it's like chlchlchclhckchl" "No it's more like psssh psssh psssh psssh" Engineers communicating....

[@robertschnobert9090]

Very accurate and relatable 🌈

[@Sim.Crawford]

Wait till you try to say thrust bearing, it's probably not child friendly.

[@transsi]

The thruster test sequence was more chlchlchclhckchl, though.

[@TrainEnthusiast69]

The frontman teaching the drummer his part

[@calebeverest8378]

@@TrainEnthusiast69 Sounds like “One” by Metallica. The part in the song where it goes “darkness imprisoning me, all that I see, absolute horror”

[@StuffMadeHere]

Very cool but so many questions! The biggest question on my mind is why numeric / software simulation is not adequate for developing and testing the control system? Relatedly, what is the rationale for using moon gravity for tests like obstacle avoidance / site selection? It seems like those systems would be totally orthogonal to the gravity situation (i.e. what the camera sees / choosing a site doesn't change with gravity). I know there must be some intricacy that I'm missing and inquiring minds want to know! My other question is why does the X axis point up. There must be a story there since that is obviously unnatural and an abomination :)

[@stealth6403]

hahah here before people notice u

[@philipcooksey3422]

My guess would be they were doing multiple tests while doing the obstacle avoidance, so collecting data for the 1/6 g in addition

[@Vimarsh24]

I was also wondering.. like why can't we just simulate everything. We have enough computing resources to do that.. Also the lander can easily do edge computing to figure out what to do based on cameras.. Definitely missing something

[@oscassey]

Simulation gives you confidence and is what allows you to proceed to these real-life conditions tests. And also consider that simulators could have bugs, outside does not have bugs (well, other kinds of bugs).

[@thelog222]

Nothing beats real test hardware and flight data! There's often some nuance or interconnection that you learn about. The intent of the program was to simulate everything as close as possible to flight so while you're right that testing things like hazard avoidance doesn't inherently require moon gravity, it was nice to get even closer to what the actual landing would look like. From what I remember of the axes decision, you roll about your X axis so it made sense. Landers are not airplanes!

[@yeetmcmeat]

The thrusters test firing before the flight is so satisfying, the sound itself is just awesome. 16:46 as an example.

[@skrimper]

It sounds like some wacky steampunk contraption

[@lunareclipse07]

It's called music.

[@GeekyBrian96]

Sounds like the start to a popular heavy metal song 😂

[@jamieandrei]

Sweet opening loop for a Kanye track..

[@royharkins7066]

Music ! Lol I thought it was Destin just playing around with an effect ! Wow 🤩

[@redkb]

I'm so glad you finally got to share this footage! What else have you been hiding from us?

[@forkify908]

Dude where’d your vids go?

[@skm8838]

@RedKB How is your cubing life going?

[@aidanbritton5476]

Dude sitting on a pile of good footage

[@PrairieKass]

Imagine replying to a KZbinr and being mad that they don't upload anymore. They don't owe you videos guys, stop complaining lol

[@wandrinsheep]

@@PrairieKass imagine being this overdramatic to a simple question from a fan of said youtuber

[@jakemcmillian]

We often hear about the everyday technologies that were born out of the space program, but we rarely hear about the ways animatronic dinosaurs have shaped the space program.

[@thelog222]

Cracked me up!

[@mattcruse495]

they re dinosaurs ! We can't give em credit! lol

[@johndododoe1411]

Reminds me of the spacecraft that evacuated dinosaurs in a Dr. Who episode.

[@jonbar140]

Is rocket fuel made from fossil fuel? In a way Littlefoot got us to the moon. Went and accidentally made myself sad with that comment

[@johndododoe1411]

@@jonbar140 Some is, some isn't. RP-1 is a special quality Jetfuel. Pure H2, pure methane and pure ethanol can be made either way.

[@TmsFin]

When the small thrusters did their little firing tests before the craft was hovering it sounded like it's about to start a concert for us.

[@hazgebu]

sounded like "one" from metallica

[@snork_games]

On the second test, I heard them call it the "burp sequence", which I find funny. 18:50

[@brantcarter5355]

It's vibin tho

[@mybackhurts7020]

I started tapping my foot waiting for the drop

[@michaelquinlan2121]

They should dye the steam from the top thrusters to add additional drama.

[@calebdoner]

Only Destin can get equally excited about lunar landers and weed eaters...and then make all of us feel the same way.

[@eirienhih]

As well as iron eating magnetic worms 😅

[@Ascertivus]

*W E E D E A T E R*

[@slazerlombardi]

He's right tho. Farming equipment is amazing.

[@mustachio2]

I think that's really cool actually, how some mundane things in the real world work are actually truly fascinating.

[@jacobshirley3457]

L A M I N A R F L O W

[@mikejefferys2528]

I'm not a rocket scientist but I can understand this format as it's broken down to easy to understand language I'm grateful for all the time and effort you put into this series and can't wait to see the next installment

[@_sticks_]

Rocket science is easy, the engineers hype it up for clout 😉

[@ryanritter7814]

@@chrissi.enbyYT yep!

[@Sp00kq]

@@chrissi.enbyYT not sure if it'll make it to orbit? Moar boosters

[@plcflame]

Control: "Let's test the system." Lander: "Silence. It's time to show you the song of my people."

[@TeoTH80]

The thruster produces some banger beats

[@patrick1532]

I was nodding my head along hahaha

[@robinbennett5994]

"Do be do be do Do be do be do Do be do be do"

[@Bionicniko369]

@@TeoTH80 I knew I wasn’t the only one who thought that was fire

[@sailingeric]

And that song is from Metallica

[@davidlynch7666]

“This will blow you up, right?” “It will melt your face.” SCIENCE!

[@0xf7c8]

Very funny how he said "melt your face" without stopping being serious.

[@gu4xinim]

@@0xf7c8 because it will literally melt the face.

[@0xf7c8]

Yup. Did you see breaking bad? The tub part? Same stuff.

[@vigilantcosmicpenguin8721]

That's what makes it cool.

[@kaktus8669]

And earlier (around 3:05) they said that it's a green fuel and good for the environment. 🤔

[@JBBrickFanatic]

One of the things I love about Destin is he takes care of his content. He held that footage for 8 years, waiting for the right video. Love your work, keep it up sir!

[@Fiveskin2112]

Makes you wonder what he’s got squirreled away on his drives. I’ll bet theres an alien spacecraft walkaround video pending OPSEC clearance. 😂

[@hatman4818]

Ground Control: "Pressures and taps look good" Lander: *Proceeds to B E A T B O X*

[@snork_games]

On the second test, I heard them call it the "burp sequence", which I find funny. 18:50

[@theaypisamfpv]

someone has to make a beat or a song out of it, i was vibing to this sequence

[@AR-fi9du]

@@theaypisamfpv Babymetal Death has an intro that sounds EXACTLY like it

[@StoveLad]

@@AR-fi9du thx for the rabbit hole (edit: Can confirm it does sound like this. Kami band did it better )

[@joancan665]

@@StoveLad Get those thrusters a record contract

[@TimeBucks]

amazing footage, thank you for sharing

[@ooghaboogha4362]

Welcome

[@lillyanneserrelio2187]

Wow this guy has the coolest job. Submarines, nasa probes, he gets to see it all!

[@nathanvalley7995]

Like how he says that wasn’t “incredibly impressive” and his buddy just smiles because they both know what Insane amount of work it took to go or for 7 seconds haha!

[@namenloss730]

I do research in computer graphics and I can tell you that's very common. A lot of what we do gets a "Is that all?" or "Seems easy though" from laymen. I actually try to help my colleagues on that because they'll go on and on about how great what they did looks and they sounds like they are ranting about something super easy

[@michaelquinlan2121]

@@namenloss730 'Making the pixels dance' is harder than it looks.

[@Cheesus-Sliced]

@@namenloss730 the problem is, a lot of people don't understand how much harder it is to make something self sufficient without our constant input. It's very different from making something people can control. This lander, for instance, like they said only did the little test to make sure it was actually functional. The action itself was underwhelming, but the fact that machine was capable of doing that test with only a "start" input is spectacular

[@namenloss730]

@@Cheesus-Sliced a friend of mine works on rendering glints and glitter efficiently and realistically. Unless you have been explained in detail how complicated it is, it looks like nothing. I'm sad for him sometimes because he is super passionate and smart but he works on something inherently underwhelming to most

[@Cheesus-Sliced]

@@namenloss730 is that for animation or VFX?

[@TheFroggynator]

18:49 That thing is so cool it has its own soundtrack before taking off. Sounds so action pumped.

[@AlexRobertskd8edr]

Linus just died a little when he saw that portable hard drive.

[@blablub2402]

Was looking for that comment

[@BryanPacker420]

More like PTSD flashbacks to sorting out that exact hard drive while he was there

[@AlexRobertskd8edr]

To be fair, it became obvious very quickly that the storage server did not have nearly enough capacity for all the footage Destin has.

[@juliankandlhofer7553]

@@AlexRobertskd8edr destin could probably fill an entire backblaze datacenter with all the footage hes sitting on 😂

[@Mike__B]

Nah... everything was on the server, that was just reminder of old aka a prop for the video. I mean who doesn't have a a box full of CDs and/or floppy disks that you never plan on ever using again, but still keep them anyways.

[@__wolf__9020]

16:46 cool beat

[@AA-zi1lv]

This comment will have 1k likes

[@Anon_581]

again at 18:50

[@tumbsor]

Those we're my favorite part of the whole vídeo!

[@B0risB]

Yea lol

[@theFrozenLiquid7]

im hearing a sick metal riff

[@JoshLoweSpace]

The Mighty Eagle has a good beat to it...

[@carolinekennedy8773]

lol it was named after Angry Birds...

[@Weretyu7777]

It did sound amazing. Petition for someone to remix that beat.

[@im.maxmou]

@@Weretyu7777 youtube is not letting me post the link, it's in my profile, hope you guys enjoy it :DD

[@dominikpfleghaar5091]

@@im.maxmou Very much so! Big thumbs up for that! :-D

[@evlson123]

@@im.maxmou I was hoping I would find a remix of the system pre-tests, thank you.

[@Postghost]

16:46 Darkness imprisoning me. All that I see, absolute horror I cannot live, I cannot die Trapped in myself, body my holding cell!!

[@MerkeR__]

i laughed way more than i shouldve at this

[@Happy_Shopper]

Was looking for this

[@kayson971]

Is this from a song?

[@Postghost]

@@kayson971 it's Metallica

[@Meowlenean]

Can't tell if this is true or a dream

[@POTThaesslich]

Next Week: Destin shows Super-8 footage of his dad interviewing Neil Armstrong in the white room.

[@vigilantcosmicpenguin8721]

What if Buzz Aldrin showed up in one of these videos? That would be cool.

[@KororaPenguin]

And if the Cleveland Indians do decide to change their team name, I would recommend the Ohio Armstrongs.

[@andrewmarthie5062]

The pre flight thruster sequence was so cool

[@pdxnate3314]

Yeah. The first time I thought it was music that Destin had edited in. It got me pumped.

[@twb7691]

@@tophan5146 16:45

[@twb7691]

@@pdxnate3314 You got to know that the more musically inclined scientists would love to run their favorite song thru the thrusters.

[@naughti_penguin2340]

amogus

[@laughingdev4119]

The beat was so pog You could definitely make a song out of that

[@andrewphillips4381]

That sick beat from the startup sequence at 16:45 needs to be a song.

[@justinfernandez1156]

Have you heard One by Metallica my friend? There is a part in the song using almost the exact same beat

[@nukedukem6]

How bout 2

[@mateo130]

@@justinfernandez1156 A bit faster though but good analogy :D

[@Ascertivus]

Yes!! I _just_ commented about that.

[@umairrizvi]

Sounds to me like start beat of Sunday bloody Sunday

[@hallquiche]

This is so unbelievably well explained. It all made perfect sense, even to an economics student like myself who really doesn't have a strong foot in mechanical engineering.

[@weekendsrule33]

Can we talk about how that lander could easily land a side gig as a club DJ with those start up beats?

[@SquattingSamurai]

Destin: “You are smart, you know what’s about to happen” Me, who has no idea what’s about to happen: “oh yeah man for sure”

[@robertlapointe4093]

I'm thinking string-trimmer jousting in slo-mo.

[@Skraeling1000]

@@robertlapointe4093 I'm wondering if a watermelon will be involved.

[@n_hotts]

He’s had a small series going on about different weedeater line types. Looks like he’s about to put them up against each other to see which is the strongest.

[@pinebearclub]

Still have no idea, must not be THAT smart...smh.

[@martiddy]

@@Skraeling1000 Definitely!

[@Rocketsmemes1]

Destin in 2050: here is my 2020 collection of covid and Area 51 footage.

[@anwar4227]

Never gonna give you up

[@sheikmohamedamanulaa3898]

Never gonna let u down

[@lepmuhangpa]

Why did they not release this footage sooner? Also... We're no strangers to love, you know the rules and so do I.

[@mikethechemis]

Never gonna say goodbye

[@Rocketsmemes1]

@@mikethechemis never gonna tell a lie or hurt you

[@Angelusundertaker666]

Destin: Shows an external hard drive saying "our footage from 2013 is in this". Linus (from LTT): Dies a little inside.

[@RazsterTW]

When they tethered the Mighty Eagle to the ground cables, they used Screamers which are used for search/rescue and rock climbing. A shock absorbing sling designed to reduce peak loads in any climbing system.

[@stephenshivers5150]

I'm so glad this footage is finally on KZbin. I remember eating lunch with you guys after this and then later Logan taking my girls and me through some behind the scenes at NASA. It was great.

[@thelog222]

Thanks Stephen! Always love giving tours.

[@peacefulentropy8365]

I'm curious about how you were involved in this process. What were you doing during this program?

[@stephenshivers5150]

@@peacefulentropy8365 I wasn't. I was actually working on something else with Destin, or rather he was working on something for me. Meeting Logan was just bonus.

[@peacefulentropy8365]

@@stephenshivers5150 That's awesome. Hopefully, we get to see the work you were involved in some time in the future. ;) Unless it's already published, in which case I would love the link! (I must've missed it.)

[@Mrvinoy]

Chapter 1: How to talk like destin Yea yea Ahaa ahaa Gotcha gotcha 😂😂😅

[@SK83RJOSH]

"I'm really excited about it" "Amazing" "So it's like this term we both know?"

[@July_Da_Fox]

"wow"

[@rencyvarghese8792]

Lol facts

[@timbushell8640]

... and way way too much 'awesome', but hey, a yank what can one say. : )))))

[@charliedulol]

roger roger

[@V14-x6n]

You’re right to the point: we will always give routine tasks to robots and software but human control will remain part of our life and exploration when it comes to anything out of the ordinary, whether it’s 50 years from now or 5000.

[@geezlouise420]

I can't believe that lander hypes the lift with that cool beat from its thrusters(?)

[@eideticex]

Line priming and testing. Pretty sure if it didn't do that, no dance.

[@snork_games]

@@eideticex Yeah, I think so too. Gotta clear/prime the nozzles. In the second test, I heard them call it the "burp sequence", which I find funny. 18:50

[@leonardwaga]

I replayed it multiple times, so satisfying.

[@dachosenone207]

I imagine that the future astronauts will say on an interview "Shoutout to Destin of SmarterEveryDay for inspiring me when I was a kid"

[@Shotblur]

Repping Haruhi in 2021, nice Nagato is still best girl, though.

[@stephenbeck7222]

There are definitely interns currently at nasa who watched Destin in high school, just simple probability related to Destin’s popularity.

[@Dalec81]

I have to say as a fellow southerner; It instills a certain amount of pride when I hear someone with a very country accent talking nerdy.

[@LordSparks]

Seriously, this is one of my favourite KZbin channels. Really glad Gav put me onto this

[@thespacetunnel3617]

16:45 When you wanted to be a music producer but your parents forced you to become an aerospace engineer.

[@mattw.6726]

I love "Introducing attitude disturbance" as a technical term. It's almost as good as "sudden deconstructive lithobraking". Almost... XD

[@Cheesus-Sliced]

I'm partial to "rapid unscheduled disassembly" myself

[@DABrock-author]

Or the ever popular “Engine-rich exhaust”.

[@Cheesus-Sliced]

I feel it's prudent to mention why "attitude disturbance" is a term. In avionics, "attitude" refers to the way a craft is facing vs the way it's moving. It's a very different definition to what people typically use the word for

[@robbriley7437]

When the lunar lander is playing One by Metallica, you know it's good.

[@Bigjoeffemt]

I was thinking the same thing!

[@eross21]

is that on purpose... because it’s awesome

[@wavion2]

Would be funny (and sad) if this video gets copyright claimed.

[@BrianK04]

how could the camera's see where to land when the thrusters created cloud beneath it? Also, does the EGCT gimbal to always point down during tilted maneuvers?

[@quadrupleheart]

Exactly the questions I had!

[@juzoli]

Radar can see through the dust

[@skrimper]

@@juzoli lidar too. I skipped all the technical bits so idk the tech on board

[@juzoli]

@@skrimper Lidar is laser, which can be blocked by dust. But lidar = radar, only with different frequency.

[@CLipka2373]

@@juzoli Actually, whether laser can be blocked by clouds depends on the wavelength of the laser, the type of clouds (dust vs droplets) and the size of the particles. For example, if we're talking about fog clouds, infrared laser could still work; and Lidar is in fact typically outside the visible spectrum (for that very reason, among others).

[@Gottaculat]

If there's one thing NASA has demonstrated, it's that things can and will go sideways at some point. It's not "if" something will go wrong, but rather "when" something will go wrong.

[@GateGeek]

16:45 That lander is about to drop the sickest new album of 2013

[@wellbi]

I actually downloaded the video and sampled it to my personal sample library.

[@vikio452]

I literally thought that dramatic soundtrack music was starting there. Was confused when it stopped and had to watch that part again keeping in mind that it's the sound of the lander test!

[@GateGeek]

Or perhaps heralding the arrival of some Winged Hussars.

[@dileejag2205]

it was just like a train in India

[@efotfilmwilliamostman6681]

I dig the sick beat at 16:47. A real banger!

[@vamp5527]

Som en hund

[@tonysuda9066]

1

[@GuidoHaverkort]

Everyone: "Mars" Destin: "But what about the moon?" Everyone: "Go on.."

[@vigilantcosmicpenguin8721]

The moon must be jealous; it was getting used to all the attention it got in the spotlight before Mars stole its thunder.

[@danielnewton2390]

"Hydrogen Peroxide is harmless." "This will melt your face." 🤔🤔

[@dkecskes2199]

As with any substance, the amount and location it is administered matters as to what it will do. I'm also guessing the substance they had in their tanks was a little stronger than the 3% hydrogen peroxide to 97% water solution in the brown bottles in the drugstore.

[@Kycilak]

@@dkecskes2199 Yeah, they said it was around 90% peroxide IIRC.

[@Melw44]

@Chess Rockwell The same stuff just way stronger and pure.

[@PassifloraCerulea]

Well, the main alternative, various hydrazine compounds, are super nasty. They can ignite on contact with your person, mess up your lungs, cause kidney or liver failure, and are carcinogenic. Anyone handling the stuff (or getting near a vehicle that has used it) has to wear a chemical suit with independent oxygen supply. They're more energetic than peroxide, but unless you really need that it's not worth it.

[@Chasmodius]

The propellant I use in my rockets is almost perfectly safe: a combination of pressurized gaseous nitrogen and oxygen (and some other things) and H2O. But I suppose even that could kill you if you got enough of it in your lungs!

[@kushmandey6880]

1:42 Early 2010s, sounds so weird now.

[@1nt3rl0ck]

how was your 2020 party ?

[@LieutenantNuggets]

I can't believe you've had this footage for years. It must've been so tempting to upload it in the past

[@Scanlaid]

"Introduce an attitude disturbance, I have to do that with my kids once in a while" 😂😂😂😂 hilarious, sensible dad chuckle

[@Stellar-Cowboy]

Hands down the best science channel with Veritasium You can’t change my mind.

[@ashraf5151]

Mark rober too

[@Stellar-Cowboy]

@@ashraf5151 oh yeah how could i forget

[@YourMJK]

Applied Science, Stuff Made Here, minutephysics. And of course Brady Haran's channels.

[@Stellar-Cowboy]

@@YourMJK stuff made here isn’t reaaaaally science is it? It’s more like a fun projects sort of thing. Don’t know the other two.

[@YourMJK]

@@Stellar-Cowboy Fair enough, but so is Mark Rober I'd say. You really have to checkout Applied Science, it's basically what the name says and he does some really interesting stuff.

[@regolith1350]

Destin: you’re smart. You know what’s about to happen. Me: Still me:

[@abhigyanmohanty7858]

Lmfaoo

[@changjsc]

I’m still wondering

[@SoybeanAK]

He's gonna revisit the weed trimmer series... by filming the interaction of strings in motion against each other, on the Phantom!!!

[@johnmiller1015]

They look like battle bots

[@phosphorus4]

@@SoybeanAK I was like what's the thing in the middle…

[@res00xua]

Gave Kiwico subscription to a friend with 4 sons and they love it. Each of the bus gets to work with Dad on a box. I got such a nice thank you note from them and likely will renew this next year.

[@danny80268]

That thing "lands" a sick beat every time it starts. :)

[@YetiThaGr8]

I was lowkey grooving with the lander. That thing has rhythm!

[@Nelivitone]

I just have to say that your videos have really risen to another level with these sea and space videos!

[@alexdumbell9485]

I loved the submarine series cant wait for this one

[@masterman1502]

This one is so much cooler because people aren't as secertive as in military

[@max_kl]

@@masterman1502 And it's also about exploration and science instead of advertisement for the military and tools for killing people (even though the technology is very interesting)

[@Chameshi]

Admire the patience of waiting 8 years before releasing footage of something so interesting!

[@kennethchristiansacramento8492]

15:09 when everyone's busy dreaming to go to moon, it's me in red just like chilling and watching them in virtual reality

[@spencereades]

Man, shout-out to the red guy eating his chips and low-key stealing the show.

[@peterparker9286]

2 analog computers a bag o chips and a microphone where it's at. I think this tech predates the supposed moon landing X UP UP ANF AWAY

[@Veptis]

The burp sequence? Is such a fascinating sound - I had to rewatch the video.

[@my3dviews]

If this was the 1960s, Neil Armstrong would be saying "where's the seat"? :-)

[@ImieNazwiskoOK]

Engineer: To heavy. Seat go YEET!

[@ohtych1004]

15:11 *builds a fricking lunar lander simulator* *at same time hold phone like that*

[@johndemeritt3460]

I love redundancy! There's nothing like it when it comes to saving a sortie/mission and the primary system goes TU. But redundant systems are only as good as the operators who recognize when a system is not operating properly. Remember a French Airbus 320 that went down in the Atlantic a while back because someone failed to turn on the pitot heat? Too much dependence on the automated system is what that came down to -- or because. So redundancy coupled with LOTS of pilot training is a GOOD thing!

[@SeanLawless]

Calling the gyro the "inner ear" tickles my brain. Cool stuff Destin

[@res00xua]

Gave Kiwico subscription to a friend with 4 sons and they love it. Each of the boys gets to work with Dad on a box. I got such a nice thank you note from them and likely will renew this next year.

[@st3althyone]

Clever as ever Destin, and I agree with you that there’s no substitute for hands on training when it comes to things like these as you never know when hardware can fail or make a mistake. It’s essential that our astronauts going to the moon be prepared for every and any situation that they may encounter, there’s just no excuse for doing it any other way.

[@carnyzack]

Yo the beat at 16:48 is fire! 🔊 🔥

[@Rooster1172T]

dude@! just commenting asking someone to sample it and make a dope tune! haha

[@SoI_Badguy]

Metallica - One

[@damnfk063]

Me: smiling and yelling wow all giggly Destin: so that wasn't incredibly impressive.. We went up and we went down

[@cjtramm8]

I got the kiwi co boxes from you years ago. They were so great. My grandsons loved them and built so much stuff. Thanks Smarter

[@KarldorisLambley]

Did destin used to be your postman?

[@mikedonaldson1820]

As a young Mechanical Engineer, Mark Rober and yourself make me aspire to be more and do more then I think I am capable of. I would like to thank you on behalf of anyone who has become inspired to better themselves in any manner! Keep up the great content.

[@graemeforbes535]

Bump for this comment, Destin has helped me stay motivated about being a ME student, thank you so much Destin for being you

[@nataliarodriguez3740]

"We need humans in case things go sideways" *chessmasters after the 90's have entered the chat *

[@nataliarodriguez3740]

My point is not that robots can't fail my point is that if a robot fails then you didn't stand a chance (and you are super dead either way lol)

[@ka-50withsaams36]

@@nataliarodriguez3740 I think that chess is different since the computer has no sensors that can give it false information, as there is only the chessboard. Then there is no unknown variables for the chess AI other than which move the other person can make. Lastly, the AI has a relatively simple set of rules where it can predict all outcomes. Chess is the perfect scenario for an AI. Real life is different in that sometimes the computer/AI can misunderstand what it is recieving, sensors can fail, the computer itself can fail, or the computer encounters a situation it was never programmed to deal with. Human control, while hopefully never necessary, is very important if the spaceship encounters a strange or unexpected obstacle IMO.

[@rnzafdude]

I’m fairly certain that every aviator can agree with me: More complex systems = more potential for failiure. Autopilot that can do an autoland is great, until it fails and you need to take over, with the shock factor of realising the system failing, at 125ft. NOTHING will replace seat time.

[@MillionFoul]

My rationale on this is that if we've completed hundreds of thousands of CAT III automatic landings without issue, but the aviation safety community still feels it should be done with at least two redundant autopilots with at least one human in the loop monitoring the system, we probably shouldn't have a shallower safety margin on the moon.

[@johndododoe1411]

Also, complex pilot assist systems tend to add unmanageable cognitive load, as seen in spelling autocorrect and various computerized aircraft that flew their pilots into the ground.

[@rnzafdude]

The latest video reminded me of this comment I made 2 years ago. Thank you for mentioning to the stakeholders all the points I wanted to remind them

[@davidesonzini1929]

16:46 Everybody gangsta till the spacecraft starts beatboxing.

[@dddon513]

17:00 - that thing was laying down a pretty good beat.

[@patryklau]

15:09 - you know it's another day in the office for someone when he's working on some chips while everyone's looking all busy 🤣

[@headlights-go-up]

Idk what Logan is talking about, that was a killer beard! He should def bring it back.

[@carolinekennedy8773]

hey this is logan's wife. no.

[@thelog222]

@@carolinekennedy8773 ಠ_ಠ

[@philipcooksey3422]

Petition to over rule the wife! Just kidding

[@carolinekennedy8773]

@@philipcooksey3422 I'll overrule something.

[@ueehurstonsecurity8887]

Thank you for all of your work Destin

[@jaypaans3471]

I just wanna say that "the mighty eagle" triggers memory of Angry Birds 2. 😆

[@وجدينصرالله-ل8م]

.thanx idea coolSo

[@iamhouse116]

I found this just as it was posted and I'm really excited to learn more about the future lunar missions

[@willscott2498]

Not even subbed smh

[@alfonsofernandezsola2629]

H

[@israelkravtsov]

@@willscott2498 yes really smh

[@israelkravtsov]

@@willscott2498 but it good the vid get recommended

[@thecampbells3908]

As an airline pilot, I can say in my opinion there should always be a human override option. The reason being - pilots are not engineers. We depend heavily on the mass science that goes in to our various crafts. We have some system knowledge, but appreciate automation to assist us in safe flights. Likewise, crafts are designed by engineers, not pilots, and engineers can not replicate a pilot. No matter how advanced or impressive the automation becomes, experience and good judgment of a human, at this time, seems to still be surperior. That's only my opinion of course.

[@David-lb4te]

24:37. This discussion was already decided decades ago with auto land systems in aircraft. If you permit a passenger aircraft with hundreds of passengers on board, to land by computer control in blind flying/fog conditions, do you want the pilot to be able to override and fly manually? The answer was yes then, and it is yes now. Even if that override is to abort, the decision and monitoring loop is the same. The lunar lander will apply the same logic. There can never be a system where ONLY the automation is qualified to land.

[@ChadMILLER0]

This was better when I heard the name as "Mighty Evil".

[@Joecool20147]

Wait does the EGC gimble? Or when the test lander tilts how does it keep the thrust going straight down to cancel the gravity?

[@thelog222]

EGC doesn't gimbal. When tilting, gravity technically isn't fully cancelled out but the difference was almost negligible.

[@Joecool20147]

Logan Kennedy Wow thanks for responding. Ok, I guess the lander never tilts enough to make the horizontal component noticeable.

[@irvbarth2069]

I would like to hear that discussed. How can the EGC with 5 times the force of the descent thrusters not move the lander more than the other thrusters as the vehicle pitches/rolls/yaw? Isn't that the whole reason for not just having the main thruster control the ship with a gimble?

[@thelog222]

@@irvbarth2069 Engineering, like relationships, is all about compromise!

[@feha92]

@@Joecool20147 I was thinking that tests has to be done where it tilts 180 degrees. How else will the software be able to cancel out any velocity during 0-g tests? Or simply low-g tests? Good to know though that the difference with the EGC pointing straight down, vs straight up, is negligible ;)

[@jerrywu615]

24:11 Destin: "... if stuff goes sideways." SpaceX Starship: "Am I a joke to you?"

[@nhwilkinosn]

The perfect example as to why manual control and someone in the seat is important

[@philipcooksey3422]

Just completely different strategies. Spacex wants it to be entirely autonomous so having a human in the loop would ruin that. Also with their rapid prototyping strategy the data they collected was more than worth the cost of the damaged starship

[@nhwilkinosn]

@@philipcooksey3422 I'd rather have a safe craft than a "strategy" he's living life like a video game. Rocket blows up, reset, try again. I guess that's a fine strategy for testing, but I'm sure that if there was a multi million dollar payload on that, I'm sure those people wouldn't appreciate their stuff getting blown up and being shrugged off in such a manner.

[@andrxw8097]

@@nhwilkinosn to be fair, rockets are meant to be "disposable." They don't expect to get rockets back after they launch them. SpaceX is changing that, making it possible to reuse them

[@philipcooksey3422]

@@nhwilkinosn will they're using this method for development, yeah of course if they only had one go at it they wouldn't use this development strategy. Different strategies have various pros/cons. Personally I think rapid prototyping is developing the technology faster so kudos to SpaceX for having the funds to execute it Edit: you also have to factor in that nasa is government money and SpaceX is privately funded. Government money doesn't really like large failures such as a starship explosion

[@jeromethiel4323]

Somebody is going to take that pre-flight thruster test and use it to make music. And i want to hear that! Such a cool rhythm.

[@chris.eskimo]

I agree. There needs to be an instantaneous human override. Or, at least human input 'adjustments'

[@PhilBossman]

Destin: Yeah, You’re smart. You know what’s about yo happen. Me: AWESOMENESS!!

[@garyhuntress6871]

I saw that, and I saw the weedeater, and I've seen the previous weedeater vids, but I have NO idea what's going to happen next.

[@hazgebu]

@@garyhuntress6871 Big Weedwhacker fight. You could turn that into a sport

[@CLipka2373]

16:46 - Okay, now that's officially amazing! Someone's gotta tell Martin from Wintergatan to take one of these on his MMX world tour.

[@rogerbeck3018]

i have watched this AGAIN, it is brilliant. Thank you Destin.

[@ATGG]

I'm seriously just about to cry. I love science xD🤣🥲

[@Blake4Truth]

What you are seeing isn't science. It is engineering, a close cousin. Science is just empirical method, a disciplined way to observe and document, to sort out how nature works. Don't love science. Love your family.

[@justincarawan-carawanco.pu1639]

16:53 Nice beat. I half-expect some to remix this into a music video.

[@Mrstreet1999]

Mad to think a future astronaut is probably watching this

[@mateo130]

You never stop amaze me with this childish admiration towards science and all these small/simple things which would change our life eventually. You are still the best after so many years Destin.

[@dougholck4276]

2013 Throwback! Way to play the long game, Destin!

[@montanamade8712]

How did the lander “see” the obstacles on the ground through all the exhaust if all they used were two cameras? But I have to admit- this was really cool!

[@Noxxiie]

Hmm, cameras don’t necessarily have see in the visible light spectrum, but not sure what they did

[@max_kl]

I'm wondering the same. They shipped all this special volcanic rock to there and made an effort to construct a realistic landscape, only to have it all obscured by the vapor. Maybe @Nox is right and the cameras were infrared

[@martindinner3621]

Except, all of that exhaust is also very hot and turbulent. Binocular radar would have made more sense.

[@max_kl]

@@martindinner3621 I thought that water vapor/fog was more transparent in the IR region just above the visible spectrum where thermal radiation shouldn't have a big influence, but I just looked it up and it's much more complicated than that... I think he said they were using stereographic cameras, so no radar

[@AstronomicalYT]

NASA made the best Angry Birds reference of all time

[@vikio452]

1. How is this not highly classified information and video footage? 2. Thank you for 22:58 "So when SHE'S landing on the moon..." You said it so naturally it caught me off guard and I shed a few tears. Thank You.

[@rubbersidedown5620]

The startup sounded like it was about to do a big drop at an EDM rave!

[@tfsplayer2275]

Yep

[@ChitranjanBaghiofficial]

even after Linus's storage upgrade, he still seems to keep data on portable hard drives. bad habits die hard.

[@Lower1K]

Not to say that any of this is simple, but the parts used on the Mighty Eagle weren’t nearly complex as I would’ve thought.

[@connordickerson6815]

If it works it works.

[@scorinth]

A lot of that comes from the use of peroxide as propellant and nitrogen gas to pressurize the system. Adding pumps and other propellants increases complexity quite quickly.

[@aserta]

Complexity is dangerous in these affairs. And i'd like to point out that a lot of things that went well the first time round for us (humans in genera) were things that were simplified (refined) from a bigger concept, where one guy or a group said: "yeah, this is too complicated, let's simplify it". I posit that a lot of things today are going bad, because they're overly complex...

[@13thravenpurple94]

Great work Thank you and Merry Merry Merry CHristmas

[@EdGrasmann]

Hi Destin, thank you for all your great videos. Will you be having more on the Coast Guard?

[@jackschoonover6418]

Wish granted