This Is Not a Shockwave

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Links to everything I do:
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Credits:
Writer/Narrator: Brian McManus
Editor: Dylan Hennessy
Animator: Mike Ridolfi
Sound: Graham Haerther
Thumbnail: Simon Buckmaster
[References]
[1] aerorocket.com/...
[2] www.weather.go...
[3] www.zehnderame...
[4] www.grc.nasa.g...
[5] / 1300787794793713664
[6] large.stanford....
Select imagery/video supplied by Getty Images
Thank you to AP Archive for access to their archival footage.
Music by Epidemic Sound: epidemicsound.c...
Songs:
Thank you to my patreon supporters: Adam Flohr, Henning Basma, Hank Green, William Leu, Tristan Edwards, Ian Dundore, John & Becki Johnston. Nevin Spoljaric, Jason Clark, Thomas Barth, Johnny MacDonald, Stephen Foland, Alfred Holzheu, Abdulrahman Abdulaziz Binghaith, Brent Higgins, Dexter Appleberry, Alex Pavek, Marko Hirsch, Mikkel Johansen, Hibiyi Mori. Viktor Józsa, Ron Hochsprung

[@Blabla130]

"Many of you will be looking at the screen with a raise eyebrow right now" I feel personally attacked

[@WulfgarOpenthroat]

Light travels slower than "the speed of light" when it's moving through a material, like air or water, so it's possible for other things(like electrons) to move faster than it. en.wikipedia.org/wiki/Cherenkov_radiation What we commonly call the speed of light - the universal speed limit - is actually the speed of causality. Light just happens to travel that fast when it's in a vacuum and there's nothing to slow it down. We call c the speed of light in large part because of the order in which things were discovered and named, iirc.

[@enhydralutra]

Same. And I continued to have a raised brow until "...in water." Oh, yes, okay, that makes perfect sense now.

[@merseyviking]

I felt less attacked, and more confused as to how he managed to see my face.

[@matttzzz2]

This video is the epitome of the "well ackchyually" meme

[@cr10001]

@@WulfgarOpenthroat Thank you for that, saved me from having to make the same explanation. Which would have been almost word for word like yours :)

[@nilomosquerapazos1207]

When aerodynamics are more interesting than a movie:

[@BenBike]

Aerodynamics* 😘

[@justanerd414]

As someone who hasn't watched any movies in years : isn't that the case always?

[@nilomosquerapazos1207]

@@BenBike oops hahah

[@2KOOLURATOOLGaming]

It's nice to watch those films that use realism for drama instead of trying to gain drama through unrealism.

[@ThinhNguyen-dk3mh]

To be more specific *gas dynamics

[@aroncoxall3058]

"Faster than Light" Me: Lies, deception

[@fnorgen]

Well, slower than the speed of light in a vacuum, but faster than the speed of light in water.

[@theimperfectgod7140]

*IMPOSSIBRU!!!*

[@aroncoxall3058]

@@fnorgenThat's what I was thinking he meant. Very cool.

[@WulfgarOpenthroat]

en.wikipedia.org/wiki/Cherenkov_radiation Faster than the speed of light through a material, which is slower than c, the speed of causality and universal speed limit.

[@ThePowerLover]

@@WulfgarOpenthroat Relativistic causality*

[@JeremieBPCreation]

The ending of this video sounds a lot like "Have you heard that modern science is completely wrong? Come give us money to get the ACTUAL TRUTH!!!""

[@truthwatcher2096]

It's a bit of a teaser to promote Nebula but he's not lying

[@JeremieBPCreation]

@@truthwatcher2096 I know, I generally have a lot of respect for their work but teasing with such a misleading statement, that is only true with an added context, and hiding the answer behind a paywall, was too similar to the behavior of clickbait and scammers for me to be silent. ¯\_(ツ)_/¯

[@tacct1kk715]

@@JeremieBPCreation yeah exactly kinda scummy ngl it's very misleading but thanks to the great guys in the comments I learnt what he really meant

[@TheCardq]

This has been the most compelling ad for nebula I've seen

[@Lyerbait13]

For real. I might actually get it now

[@dido1803]

I totally agreed. I'm going to subscribe.

[@dbeasleyphx]

So happy for this video. I’ve known all along it’s not a sonic boom, but it is such a “common knowledge”.

[@AxxLAfriku]

One thing! Just one thing! Please tell IT to me: WHY tf do I have so many fans even though no KZbinr is unprettier than I am? WORLDWIDE!!!! WHY??? Tell me, dear dav

[@NosiAttack]

As a Guile player I do appreciate you finally clarifying that those are not sonic booms.

[@Etherkai]

*Guile theme intensifies*

[@jeffbenton6183]

Is Guile a video game?

[@remliqa]

@@jeffbenton6183 No, it's a movie .

[@deus_ex_machina_]

@@jeffbenton6183 Guile is a character from the arcade, and later console/PC videogame franchise 'Street Fighter'.

[@juice6521]

SONICCU BOOM

[@joshsvoss]

Isn't the vapor caused by a drop in pressure, rather than a drop in temperature???

[@theOrionsarms]

Not, the condensation don't happen if you decrease pressure whiteout a decrease in temperature, but a sudden decrease in pressure reduce the temperature too.

[@joshsvoss]

@@theOrionsarms ahhh. So the reduced pressure causes reduced temperature, which causes the condensation, is that right?

[@theOrionsarms]

@@joshsvoss this is the correct explanation.

[@monteiro5306]

It can be seen on the wing tips of F-1 cars when racing on tracks such as Spa-Francorchamps. Amazing video Brian. As always an awesome job. Greetings from a Brazilian subscriber.

[@haaake]

Not really at all comparable to a jet traveling in a straight line forming these particular type of cones that absolutely ARE formed from air moving at transonic speeds. It happens when you have large pressure differentials from air traveling at very high speeds, like on the backside/end plates of an F1 wing, or behind a transonic shockwave forming around leading edges of a fighter jet. It can happen subsonic but doesn’t mean it doesn’t also happen with transonic air. Saying this cone isn’t ever visualizing a transonic shockwave is a dumb semantics argument. Which engineers love to make all the time.

[@kweezynonya955]

5:02 "Eyebrows Definitely Raised" 🤣👏👍🙏🏆

[@regolith1350]

Just to double check that us non-engineers are understanding this correctly... When air travels over a convex shape, an "expansion fan" is created behind it. This expansion lowers the air pressure, which then lowers the temperature, which then (under the right conditions) causes the water vapor to come out of solution (condensation) and become visible as a "vapor cone". And this occurs because of two basic phenomena: 1) the direct link between pressure and temperature 2) the lower carrying capacity of colder air Is that about right?

[@samuelasieduawuah296]

No one has provided me with a better explanation of shockwaves. Amazing!!!

[@aryehoser8902]

PLEASE DO AN EPISODE ON THE DIFFERENTIAL/ANALYTICAL ENGINE - THE MECHANICAL CALCULATOR

[@ellisjackson3355]

That sounds like it would be interesting. Just like the mechanical ECMs that BMW planes had during ww2

[@codybecker]

Just signed up for CuriosityStream and Nebula with you code! Excited to start learning 😁

[@MrAlexs888]

5:00 what about the shockwaves from a far away explosion? You can see that clearly in videos

[@robspiess]

Yes, this is what I was also thinking.

[@rcpmac]

What you see is the effect of the shockwave on objects and particles in the air

[@JCisHere778]

You should lookup the taylor neumann sedov blast. Especially the pressure distribution. Although the pressure spikes momentarily after the shock, it decreases below the ambient pressure. Resulting in the condensation of vapour

[@MrAlexs888]

@@JCisHere778 i mean those explosions from myhtbusters or i donno, you can see a clear line in the blue sky travelling away, is that also condensation?

[@whuzzzup]

@@MrAlexs888 Maybe it's an effect like a mirage?

[@UllalPrajwal]

Interesting to finally learn about these cones, had witnessed them several times in the outskirts of town, who's air space was used as training area by Air force

[@tinglydingle]

Thank you so much for making this. I've had so many arguments with people online about this, and now rather than type out a rebuttal each time, I can just link this video.

[@RustyRacer]

Good move, now I'm genuinely considering nebula

[@alanbejarano4940]

Guile : "Sonic booom!" Real Engineering: "This is not a Sonic boom" Guile: ☹️

[@richardcloudbase]

Fantastic video. Just to be picky you are not seeing water vapor. When the water vapor in the air condenses, it becomes tiny droplets of water (liquid). The same as a cloud.

[@ohaviafeldman8535]

"Many of you are going to be looking at the screen with a raised eyebrow right now" I'm was trying so hard but I can only do them both at the same time.

[@shinyamichimi114]

I believe this is the same phenomena that you see on the edges of Formula 1 car rear wings in high humidity conditions

[@oldtimefarmboy617]

If a jet was traveling at the speed of sound just above sea level it would be traveling to fast for someone with a camera to follow. At 50 feet above sea level the speed of sound is 761 MPH, 4,018,080 feet per hour, 66,968 feet per minute, 1,116.13 feet per second. That means you would travel one mile in approximately 4.73 seconds. Traveling faster than the speed of sound also causes a "boom" sound when the shock wave reaches your ear. No sonic boom in the video.

[@ishaanvohra2311]

Wow, I didn't expect Real Engineering to delve into some particle physics with the Cherenkov radiation! What a pleasant surprise :)

[@banksofbarcelona3893]

Teachers like you teach and do the world good, lesson taught is mostly understood!

[@stevengeorges9046]

To clarify, that famous photo of the jet with water vapor behind it, is going slower than the speed of sound?

[@mohammadamin8289]

Chernkov effect, totally normal phenomenon, can happen with minimum radiation

[@vicenteeichler8804]

Hello Real Engineering, I think the video is very well done and I learned something I don't know as an Aerospace Eng. student. What is you background for curiosity, I saw your references and you are able to condense and simplify a lot of complicated info, that's amazing, I would like to that as well.

[@syx3s]

it's low pressure that pulls the water vapor out, not less temperature.

[@ahobimo732]

I've actually been considering looking into Nebula/Curiosity Stream. But trust me - the coercive tactics being used at the end of this video are NOT the way to encourage people to move to that platform! I strongly encourage Real Engineering and other KZbinrs to avoid this approach. I think it will be completely counter-productive.

[@lostregressor2376]

Then what is it called when a high pressure bomb explodes is it a shockwave?

[@jborynec]

Hmm, a wave has both a peak and a trough. So, if we are looking at trough of the shockwave, isn't that still a part of the shockwave?

[@Czechbound]

Great to hear an Irish voice here. The expansion of a gas due to lower pressure, resulting in a drop in temperature is the reason your can of deodorant, at room temperature, releases it's contents that feel very cold on the skin : as the deo exists the can, where it is under pressure, it expands and cools rapidly. On the flip side, your bicycle pump gets hot when you pump it as increasing the pressure will increase the temperature of the gas.

[@raytan956]

5:03 jokes on you i was looking at the screen with *two* raised eyebrows

[@jonadabtheunsightly]

At 2:48, you mean 100% relative humidity. 100% absolute humidity would imply the water has no dissolved air in it, a condition that only exists in physics labs, and also it would be quite odd to use the word "humidity" in that context.

[@orac229]

I'm going to watch my DS9 dvd's

[@rfldss89]

Oh so if I understand it correctly, that condensation doesn't happen at cruising altitude because the air is so dry up there, from being really cold?

[@Jablicek]

It is. Best place to see this condensation is often at takeoff when the AOA is high enough and in the right weather.

[@Hiperruimteindustriee]

You have 3.14M subs, that means you must do a numberphile collab!

[@1995TheDude]

A raised eyebrow? Make that two raised eyebrows!

[@jonathanwhite3507]

I just feel like this belongs in the common knowledge folder.

[@agravemisunderstanding9668]

Don't the walls of super pressured air block more air from passing through it lowering the pressure directly behind it even more?

[@yashvashistha6004]

I am a student now but once I start making money I will get nebula and curiosity stream

[@RC-1290]

5:15 At this point this started to look like a 5 minute long introduction for a 2 minute ad for nebula. I can't even figure out why it doesn't feel that way with other videos, but does for this one. And it's not like I don't want to support Real Engineering; I'm wearing a Real Engineering shirt right now, and I previously looked into nebula... it just felt like it was a bit of an unfinished platform, lacking payment options, so perhaps that's why I started getting more sensitive to these ads.

[@psychosis7325]

Cherenkov Radiation

[@gavinward5448]

At last! - someone who knows what he's talking about! Good explanation/presentation.

[@GertvandenBerg]

A link to the nebula video in the description would be useful... (otherwise I need to search for it there)

[@dido1803]

awesome presentation and easy to digest.

[@keilerbie7469]

LOOK I want to subscribe to Nebula but until European payment processors get added I will continue to pirate everything from the site.

[@juancholagarto1138]

Are you sure it's a drop in temperature and not in pressure what causes the water condensation?

[@mattf2436]

Lol. You got me with that rased eyebrow

[@Darkmattermonkey77]

There’s other places that molecules can’t get out of each other’s way fast enough. The heart of a sun. 😅

[@ashokiimc]

Last time I was this early people still thought that achieving the speed of sound was impossible.

[@daneilpatro2776]

Love the monthly content Would love the fortnightly content more

[@hrkalita159]

Thanks,I was thinking about this😄

[@elqyanoesquia6877]

0:50 that’s one big fucking plane

[@raianesouza1773]

I'm Brazilian and I really like your videos, they are fantastic! but some videos do not have subtitles in Portuguese (Brazil). Would you like to enable subtitles?

[@bluered1322]

I thought nothing could travel faster than light? Edit: Nvm just read a comment explaining it

[@motorolaandroid5688]

I started this day learning something new. Nice!!

[@tojassargaja2085]

Is the temperature drops because in those areas the pressure is low?

[@162manoj]

yoo Cherenkov radiation! oh wait it is in nebula... oh well. nvm.

[@YOLO-tq3el]

Why do some aircraft have some hexagon wings?

[@cabanford]

Nice to see information instead of disinformation

[@henryginn7490]

Slightly misleading to say faster than the speed of light when it's actually faster than how fast the light is travelling (which is not at the speed of light/cosmic speed limit/how fast light travels in a vacuum)

[@adampay8906]

I have Mass Effect to thank for my knowledge of Cherenkov radiation. I heard of it, then looked it up and learned what it actually is.

[@truesimplicity]

Just for my edification you state that the visual representations used in Google are in fact expansion fan effects caused by the compression of water vapors in the air to differing degrees based on temperature, atmospheric height and water saruration... I get that, however, what I don't get is the gratuitous commercial for your other format, without elaborating on the comparisons. It has the opposite effect on your viewing audiences than intended. Leaving a feeling if bait and switch, similar to the old circus sideshow pitchmen.

[@rcpmac]

Dude, the man needs to pay the bills too

[@truesimplicity]

@@rcpmac Yeah, I get it... I personally, have just developed and aversion to and subsequently have moved away from overlay aggreuve self promoting channels. Now leaning towards the smaller more genuine content driven channels. When more than 30% of any posting is self promotion, on top of KZbin commercials, I draw the line. There aretoo many truly good options by devoted science professionals available and just too limitrd viewing time. Not a hater, I've just noticed a pattern that once content providers reach million plus subscribers they tend to loose focus on what got them there in the first place. Thereby exponentially becoming consumed with their algorithms and paid platforms.To the point that their info is incomplete choosing to Uber promote similarly to Movie Tailers🍿 and the message is lost the content suffers. Wish them all the best, just not me any longer. Thanks for your opinion.

[@randomphoenix20]

"I provide and explanation in Nebula". You son of a bitch, I'm in.

[@jsl151850b]

In an eBook I've read it's called *The Prandtl-Glauert singularity*, unless he was just making it up. Wiki isn't sure it exists?

[@jamster251]

It's a GOD DAMN ARMS RACE!!

[@Broken_dish]

if your flying and another plane where to be coming towards you faster than the speed of sound when it passes you do you hear the sonic boom or maybe feel anything from the pressure it creates i know distance away might effect things also

[@Orbital_Inclination]

No, because the local speed of sound is not in relation to the velocity of the jet passing you, it is in relation to the local atmospheric conditions

[@MrFoxRobert]

Thank you!

[@dCash117]

Please do the insane engineering of your KZbin channel

[@robf228]

Best explanation of sound waves, sonic booms, speed of sound that I've seen. It's easy to see why crossing the sound barrier was so difficult.

[@alexander1485]

Vapor Cone PS- Dislike any video with built in ads.

[@uramalakia]

This is just a tribute.

[@GoldSabre]

Video ends at 5:14

[@Overneed-Belkan-Witch]

Funny people stil confused water condensation with Sonic boom

[@iBECKENGINEERING]

well explained.....thanks

[@ElijahPerrin80]

Cherenkov radiation is awesome.

[@hillolbarman]

This really sucks when a content creator publishes part of a topic behind a pay wall. 😔

[@VaupellGaming]

Nice video; however Plenty of blue light videos from reactors here and as a premium member i don't get commercials anyway. And you should get a larger split from my premium rather than videos. ;) Only reason i bring it up, it's because 30%+ of this video is a plug to change behavior and goto a different site.

[@TheBetterGame]

"Which we are going to have to cut into 15-20 minute versions" okay, okay... but that doesn't explain why this video is only 7 minutes long. Was this topic really that simple?

[@RightLadd]

I definitely count for 10% of the total views for this channel

[@NikanDragosysSerpenDra]

so you guys just care about money, exclusively, max 30minutes for the algorythims? SOMEONE pirate their shit NOW!

[@DrGreaterLoser]

Cherenkov effet. Can happen with minimal radiation.

[@mathieuprovencal6392]

for the blue light, LOOK FOR Cherenkov radiation. It's when charged particles move faster than light through a medium ( in nuclear reactors it's water). Though, when we say "nothing is faster than the speed of light", it is true, in a vacuum like space. Light can be slowed down when travelling through different mediums like water, making this possible. In water, light travels at 75% of it's vacuum speed.

[@40watt53]

Let's get this to top comment so we don't need to get Nebula.

[@hirvielain9013]

I was kinda annoyed that he didn't mention the Cherenkov radiation by name for those who are interested to look it up. Forcing to watch an another video of his for an explanation isn't the way to go.

[@BloodAsp]

Thank you for pushing for free and avaliable information for all!

[@seamon9732]

MVP comment

[@thethreeheadedmonkey]

Don't educate people with FACTS. Who knows where that will lead!

[@nmccw3245]

The Cherenkov radiation tease is brutal…

[@nogussy]

Yeah, doesn't even tell you its name, as if nebula is the only way to understand it

[@konstantin.v]

Каких ещё черенков? 🤭

[@timlash]

@@IdunRedstone Fair I guess, but I drop YT subscriptions when the YT content becomes little more than an ad for their Nebula content. Don't want Nebula, never going to buy Nebula. I don't mind a prompt at the end, but a nasty tease at the end just seems mean. That's not why I follow educational YTers. If they can't make it work on YT, that's fine. Stop. I'm not owed a YT video. But don't rub my nose in the fact that I'm missing out on even better content.

[@Kyle-gw6qp]

@@IdunRedstone To be fair, KZbin has faaaaaar more content than Nebula.

[@IdunRedstone]

@@Kyle-gw6qp And also faaaaaar more viewers. Point is way more of those viewers would pay for YT premium if it was cheap and not more expensive than even disney.

[@adhithasimhanraghavan7516]

This is a vintage type of real engineering video 😍 pure technical stuff explained to the point!

[@DyslexicMitochondria]

And I love it so much

[@sterlingarcher8041]

@@DyslexicMitochondria your username made me click on your profile. Your channel is a hidden gem bro

[@cobeer1768]

Really? Where? All I saw was a teaser and ad for nebula

[@WeBeGood06]

But wrong.

[@konstantin.v]

@@cobeer1768 , exactly! 🤭

[@MrSeerocket]

Great video. As a former aviator who flew the Hornet, I appreciate the clarification of the principles at work. One correction... 2:40 “If we were at 100% *absolute* humidity..”. Absolute humidity is the amount of water vapor per volume, and is independent of the temperature/capacity for the air to hold more vapor (i.e. 5G/m^2) Any time we refer to a percentage humidity, that is, by definition, *relative* humidity.

[@jakobrosenqvist4691]

I was just about to say the same things.

[@WeBeGood06]

Ah, you flew a Hornet, cool. Another Clarification, the jet has entered the "Sound Barrier" as indicated by the Supersonic Flow of the Vapor Cone, where water condenses across Supersonic Expansion Waves and evaporates across the Wake Shockwave. The second Boom of the classic boom-Boom forms first as the "Sound Barrier" is entered. The back half of the aircraft is flying in the Supersonic Bubble of the Sound Barrier. So, there actually is a Boom that is finite, circular, and grows to infinity at Mach 1, where the first boom forms. boom-Boom.

[@matthewharbour6276]

Hey when you break the speed of sound can you feel anything at all?

[@55dbk]

@@WeBeGood06The vapor cone can form and be visible even if the jet is flying at subsonic speeds. All that is needed is for the expansion zone to have a sufficiently low pressure that water in the air becomes super-saturated and therefore condenses as visible micro-droplets. Higher humidity ambient air requires lower jet speed to produce this effect.

[@gregmead2967]

I see I'm commenting on almost exactly the same thing, a year later. It's odd that the narrator made that weird error.

[@RealEngineering]

This video was inspired by a Twitter thread by Dr. Chris Combs, a professor of hypersonics in UTSA. He also helped me research for the X-15 video. Also, the saturation explanation is not strictly accurate, but it’s easier than explaining that the balance of evaporation and condensation changes. Don’t @ me meteorologists

[@xx_insert_cool_username_he6876]

Twitter has did something good

[@RealEngineering]

Twitter is class. Just follow cool people like hypersonics researchers.

[@nilomosquerapazos1207]

Amazing work! Would it be possible that you made a video about the new and insane next gen drones the USAF is developing (mq-25, XQ-58 Valkyrie…) ??

[@kirkc9643]

@@RealEngineering Twitter is a festering cesspit. A blight on humanity.

[@cerealspiller]

@@kirkc9643 Something of an over-generalization, IMO. Kind of like saying humanity is a blight on humanity. Wait... nevermind.

[@gpaull2]

Nebula needs comments. Half the fun of KZbin is the comment section. I won’t be renewing.

[@mimikyoo]

Real engineering videos be like "if this is not a hot dog: what is it? To answer that question, we need to talk about the industrial revolution..."

[@konstantin.v]

... and subscribe for Nebula 🤭

[@polakrodak8538]

And sub to nebula

[@tacct1kk715]

And buy nebula ffs it's so annoying I'm not paying for that shit sorry

[@thespongeisright774]

Does anyone know the difference between an introverted engineer and an extroverted one? An introverted engineer looks at his shoes when he talks to you. But, an extroverted engineer looks at your shoes when he talks to you.

[@sclarin2]

"If we were at 100% max humidity" so Florida then

[@LadyAnuB]

Or the coast of Central and Northern California during summer.

[@jr5960]

Love the video. Just a quick note: clouds and the like aren’t made of visible water vapour; as gaseous water is invisible. These are examples of condensed water in liquid form, as tiny micro droplets, small enough for gravity forces to be small relative to other aerodynamic forces, keeping these micro droplets aloft as fog/clouds. Cheers!

[@rcpmac]

Wow, very interesting point and the only comment worth reading

[@michaelhart7569]

Yes, I spotted that too. Wasn't sure if it was a slip of the tongue or not. I'm also pretty impressed that he had the courage to quit his day job before even uploading a video. And it's getter braver as KZbin seems to delete more and more channels it doesn't like for no clear reason, even when they don't breach the terms of service which are deliberately vague.

[@Detton80r]

@@michaelhart7569 Can't let the simple Truth slip out, can they. lol

[@Detton80r]

So what we see is the sudden density change? Intriguing...

[@RetinaBurner]

Outstanding explanation. I've known this for years, but it's refreshing to see it explained so thoroughly and simply. Nicely done, as always. :)

[@patrykc9050]

I love this channel! If I wasn’t a broke medical student in hundreds of thousands dollars in debt, I’d sign up for nebula in a heart beat! Hopefully in the near future!

[@elena6516]

nobody cares

[@jonathanmeza6527]

@@elena6516 Nobody cares about your comments

[@patrykc9050]

@@elena6516 I hope you have a wonderful day!

[@ilyamiskov]

@AkkiSciChannel The truth is, nobody truly cares about anyone but themselves.

[@friedrichvonsnatch3501]

Do you ever have to pay off student loansthe US? In the UK it's very rare anyone pays off any decent amount

[@abdulmuhaimintahseen7710]

This is the difference between googling something with no knowledge and actually being a smart student. Great video!

[@WeBeGood06]

Not sure I would say that, he just doesn't know where to look to see the Shockwave in all those images. Because you can see the Wake Shockwave in most of those images. It's where the cloud evaporates as pressure and temperature increase across the supersonic flow returns to subsonic flows. The base of the cone is a visible shockwave.

[@konstantin.v]

@@WeBeGood06 , cannot the cone appear without the aircraft going supersonic? 🤔

[@WeBeGood06]

@@konstantin.v The cone appears before Mach 1, it is supersonic flow. The tail of the aircraft flies supersonic before the bow of the aircraft. The cone are the Expansion Fans or Expansion Waves of the Sound Barrier. The top of the cone is the Wake Shockwave. The Nose of the Aircraft is the last part of the aircraft to fly supersonically.

[@konstantin.v]

@@WeBeGood06 , thanks! It makes sense. I was just wondering if those cloudlike protuberances can appear without anything going supersonic at all. After all, the plane does alter the pressure around it as it flies even when everything is subsonic 🙂

[@Red_Twizzler]

“15 minute is too long for KZbin algorithms” says no one with a successful KZbin channel.

[@6alecapristrudel]

I agree that "the algorithm" is a shitty excuse, but ya gotta wonder how much money are they making from nebula then? It has to be worth their time to make longer videos exclusively for that platform.

[@ShinodaChan]

Ironically it just turns me away from Nebula / CuriosityStream more and more when content creators cut their videos short so that they can have an extended cut on another platform I hardly had any interest in to begin with. Doesn't help that said content creators constantly shill the same few services (Skillshare, Nebula etc.) to the point where even hearing their name can be annoying.

[@Zveebo]

Yeah, it just annoys me when creators cut big parts of their videos to make Nebula versions better - especially when they then spend the time talking about Nebula 🙄

[@rcpmac]

What he said was 1hour is too long for the KZbin algorithm so it will be broken up into segments

[@CephaloG0D]

Literally split it into 15 minute segments and upload them once a week until the series is finished. "But it's 52 minutes, not 60". Perfect! You have 8 minutes to place ads.

[@banksofbarcelona3893]

Not a sonic boom? I guess we'd never know the secrets of Guile of Street Fighter!

[@sircrapalot9954]

Guile’s hair was completely out of Air Force regs too.

[@banksofbarcelona3893]

@@sircrapalot9954 exactly.haha

[@YounesLayachi]

A sonic boom will be followed by a condensation cone, but the opposite isn't always true. You can also check footage of big explosions, where massive shockwaves are created and followed closely by a wall of condensating water droplets

[@nikospapageorgiou57]

Cherenkov radiation isn't something new. But just saying that these particles move faster than the speed of light within a medium, does not help in making people understand, that the speed of light within a medium like water, is significantly lower than that within a vacuum (300.000Km/sec)