Great video as usual! If I could make one comment, I would suggest using a singular term, "firearm." You use "weapon" in the video a few times. I feel this can bring a negative perception to out great sport as word play can be easily manipulated. Thanks so much for all your time in shooting, editing, and bringing this great videos to us!!
Ma rapaz nao acredito, você por aqui!? Vc tb fi otimos videos! And Destin, thank you so much for all the knowledge you bring to the world... if this was about 20/30 years ago only someone that actually worked with it professionally would have the chance to visualize something like this, again thank you, you're freaking awesome! Cê tb Peste!
As someone who does ALOT of testing for silencer companies. This video further validates nearly everything that I have spent my career doing. Many things that you didn’t even scratch the surface on are present in this video. Thank you.
@@dphorgan It's not our fault this guy has to put up a disclaimer. Thank the NRA for constructing a massive propaganda campaign to convince people who've never read any of the federalist papers that they have an inalienable right to own a the same weapons as the military and then encouraging people with absolutely no training to impulsive buy guns and leave them laying around where children and the mentally ill can get ahold of them. That's on y'all.
Ok i have to make some assumptions, positive assumptions, but i love that you include your family in your videos, and how they are a part of the learning process. It speaks volumes of how well you were raised by your parents and they have to be very proud. Thank you so much for using the internet for what it was intended to do, educate on the “information superhighway” and get Smarter Everyday
Hey Destin, your friends rifle was made by a dear friend of mine. Unfortunately he passed away a few year ago. But I can tell you with certainty that he would have been fascinated by this video and all of the invisible physics you have made visible. Thank you!
@@Centermass762 yup. I knew him when he was still working out of his garage making custom gun barrels. Actually now that I think about it, I helped build his garage.
The reason that the shockwaves don't immediately appear on the bullet after it leaves the muzzle might just be that the airflow in that region is also going fast and in the same direction, so that the bullet isn't supersonic relative to the air in that region
That's really good insight. The propellent itself was faster than the bullet so it makes sense that the pressure wave is moving faster as well. That gets me thinking... If gases are trying at super Sonic speeds, and a bullet is traveling at the same speed, would we still get a pressure cone? No right? Because that pressure cone is specifically the bullet moving the gas out of the way. That being said, does extreme temperature affect the angle of the Sonic pressure wave? Colder air being more dense and harder to travel through must be impacted more I NEED ANSWERS DUSTIN
@@AarPlays 1) you're right, what makes an object moving sub or supersonic is his speed relative to the fluid surrounding him compared to the speed of sound in that same fluid. So a bullet can move at a supersonic speed in relation to still air, but subsonic inside the flow exiting the barrel at high speed and temperature, thus not producing a shock wave. If you ever fly across the Atlantic heading East your plane will sometimes reach "supersonic" speeds relative to the ground while still flying at Mach less than 1, thanks to very fast winds (jet-streams) at cruising altitudes. 2) Temperature affects the speed of sound in a given fluid, augmenting four times the temperature (in Kelvin) will double the speed of sound in the fluid (~). If the bullet's speed remains the same relative to the weapon, a higher air temperature will produce a less angled shock wave, or even none at all, while a colder temperature will make the shock wave more oblique. This could also be a factor in the delayed formation of shock wave seen in the video
Very good point about the temperature, hadn't considered that as another factor! Also interesting fact about the jet stream! Airliners cruise at something like Mach 0.7 or Mach 0.8, and some jet-stream forecast I just found shows regions moving at more than Mach 0.2 relative to the ground. I was aware of these things, but never considered that they could add up to more than Mach 1 relative to the ground.
Hey, cool setup! You can improve it though, because the light from your source travels through your shockwaves twice (once on its way to the mirror, and once when it goes from the mirror to the camera) you can see two schlieren images on top of each other, but with a small offset. By enlarging the angle between these two beams (your light source doesn't need to be next to your camera) you can make sure that the light travels through your area of interest only once, and you'll have much clearer images.
You make the world a better place. Don’t ever explain yourself for any reason. You show every person, animal and idea respect. Please continue to do exactly what you have been doing in the exact fashion that you have been doing it. Please and thank you.
Destin, I encourage you to never say sorry for including guns in any of your videos as long as you're safe with them and you're teaching us something about them. Also, don't start putting fake titles on your videos (pointing fingers at a certain TH-camr with this one, but not you).
Your intro segment of this video is well thought out and intelligently said. I'm a firearms enthusiast and I , too, ponder the physics involved in the effects of the projectile. Not because of it being a fired bullet but the science behind it, involved in it, and how it relates to everyday things that we have no clue about. Such as aerodynamics and physics. I'm not college educated, but I am fascinated by science and mechanics. I really enjoy your videos and hopefully, I am getting smarter everyday.
i finally figured out why you are so great to watch, other than just having overall professional content. Its because you truly love this, this is your passion and it shows. your not just tossing things together for views. i feel like even if you deleted the channel and stopped youtube. you would still be doing these kind of experiments, you cant duplicate a passion like that. it has to be genuine
You shouldn’t have to apologize for liking guns whether it’s for hobby or for science. Also great video. I found it strange that there was unburnt powder leaving the barrel due to its length. It wasn’t much but the company who designed the round said it should all be burnt at around 9 inches (like your friend said).
Destin, Honestly, I originally found your channel through my interest in ballistics (along with several other channels I follow) and I love the content you put out. I spent 24 years working in EMS and developed a keen interest in ballistics there. Even though I left the field, the science still intrigues me (as does most science, Physics is absolutely amazing to me in general). I hope no one is hating on you for the fact that you use firearms to demonstrate the science behind ballistics, because it is a fascinating subject that doesn't require one to be a 'gun nut' to appreciate. Thanks for being awesome man!!
People are ignorant and that’s the only reason the opening comment was needed in the video. I agree with you and think it’s sad that it even need be a point. But of course some how will be offended by a video with guns they don’t have to watch.
@@aaroncockrum1004 Don't ever let people downplay that common interest. Those that desire power benefit from dividing people. Finding what we have in common and enjoying them together is how great things are achieved.
Don't worry Destin, we gotcha. I was never into science until I saw videos of yours, Michael Stevens, and veritasium. I definitely feel smarter every day. Now science to me is so interesting and fun.
Ricky Molner I hope all three of them see this somehow, getting more people intresserad in science one of the biggest points of "edutainment" so you must feel like mission accomplished for them.
Hi destine l doubt you will every read my comment but just on the off chance you do read it ,I just want to say thank you for your time and commitment for making these videos , the reason for my comment is I’m a 59 year old chap and that I’ve been on pain relief meds for back injury I’ve been on them for just over 14years I’ve decided to go I think the fraise is cold turkey? As I am to ashamed and embarrassed to go to my doctor,I would rather have the pain than the addiction of the opiate based meds I’ve done from just before Xmas to now I think I’m at the back end of it now I’ve past the cramps,sweats,shakes and shivers ,I guess what I am trying to say sir is through these last few weeks is, it is your hard work,commitment,passion, dedication, and your enthusiasm of your videos that has kept me focused in my little challenge to come off the nasties,and thanks to you sir I am a little bit smarter ,and also sir you have, if a may be bold enough to say you have a beautiful and understanding wife and children you must be so proud of them as they are of you , so may I finish by saying keep making me smarter through your videos ( but family comes first ) and once again thank you my dear sir for helping me in my little challenge , I must go now there’s still a few of your videos I have yet to watch. Ps please sir you and your family have a great 2019.
I really enjoyed interacting with your Schlieren imaging display at ThinkerCon. I breathed in front of it to watch the shadow of the air movement. Someone else asked me what was going on in the setup and I explained to him what I had learned in your previous video, which made me feel smart, but then I had to explain to him that I didn’t have a TH-cam channel and I referred him to your original video. (I could’ve totally stolen the credit). Anyway, thanks not just for bringing this setup, but for making ThinkerCon possible. It was definitely one of the highlights of the year.
Don't listen to people somehow saying you're "supporting guns" by doing these videos. You're examining guns, just like a statistician can study murder rates. You aren't advocating people own guns, you aren't advocating people hunt, nothing.
This is one of the greatest videos ever to be uploaded to yew toob! You are a special person my friend but your delivery is what makes you stand out! You explain it in a way that our friends without the physics knowledge or firearms experience can retain the information! I don’t know if your cool buddy told you or not but the Blackout round was developed to be ran through a 10.5” barrel with a suppressor! And it was AAC(Advanced Armament Corp) a suppressor company who developed it! Makes sense why it’s such a powerhouse of a round. ........At the beginning of the video....... Only thing I can throw out on the table is do not pander to those radicals, don’t even crack that door for them! Do what makes you and yours happy and all of us hitting the like button. And if that just happens to be something legal, legitimately awesome and Christian you know you are on the right track! Keep it up my friend, God Bless!
I don’t mind you glorifying weapons, you need to use them against the bad guys so as to protect your family from harm. What else would you use to get these highly educational videos? You take care and God Bless you and your Family.
I aggre. From everything I have seen on this channel he seem to treat the firearms with a lot of respect (or regarst for safety). The only thing I recall that would come close to irresponsibility was shooting a drone out of a tree.
Hi Destin, great video as always ! I'm an aerospace engineer and I think you are wrong trying to calculate the Mach number that way. The mach cone and the conical shock are different things, in fact the mach cone is narrower than the conical shock and it is also really difficult to see because it's really weaker than the second one. Usally, knowing the angle of the shock cone and the the curvature of the bullet it is still possible to find out the Mach number but it's quite harder than what you show. By the way I really love your videos, keep doing this stuff !!!
@@smartereveryday i think what he is trying to say is that there is uncompensated error in measuring the Mach number that way. the intensity of the shock locally alters the speed of sound so the leading edge of the shock is always at a lesser angle than the stp shock would be. as the shock gets further from the bullet the intensity decreases and the limit approaches your measurement. obviously these effects scale with speed, object size, temperature, density, etc.... you get the picture. it's mostly just a technicality. and by that i mean the difference only truly matters with 'large' very fast objects where large is a reference to the amount of thermal energy actually generated by the air compression. this effect would matter a lot with hypersonic objects.
@@Unmannedair Actually I was just trying to say that the procedure shown in the video is correct only if, what you see with the schlieren technique, is the mach cone but it's not. What you see is the conical shock, that is really intense and the density changes a lot so you are able to see it. But conical shock and mach cone are two different things, the angle of the conical shock does not depend only about the Mach it also depend on the curvature of the bullet. There is still a correlation between Mach, angle of the shock and the curvature so you are still able to calculate the mach given the two angles but the relations are quite more complicated than what is shown.
@Michael Cornman Exactly, the mach cone regards small perturbations and it's quite impossible to see directly. If, under the bullet, there is a platform with holes equally spaced than when the conical shock (that moves at the same speed of the bullet) hit the holes you should see under the platform the formation of spherical waves that together create the mach cone. This is a way to actually see the mach cone and you should see that it is narrower than the conical shock. By the way you are right about the fact that you need oblique shock equations, but as you say you have to correct them. The oblique shock equations are right for a 2-dimensional phenomena and what we have is a 3D conical shock, but with some corrections what you finally obtain is quite similar to the oblique shock relations.
@@Unmannedair Type on google "A two-dimensional wedge projectile shown in the frame moving with the projectile The fig1" if you click the first result there is a clear figure that show how a conical shock and a mach cone are two different things.
That completely rocked the suppressor world for me...(in a purely vicarious suppressed and silent way) your analysis is the kind of input that will change their technology for the better. Noise suppression is a highly underrated force to be reckoned with and your video goes miles toward better understanding. Bravo... next comes the family moment in the kitchen, well that was the best product promo I have seen in a long time ... Your delivery was flawless and engaging, well done, and last but not least, big kudos the fam who under "extreme heat" did not get out of the kitchen.
Who is out there complaining about YOUR channel and YOUR content??? If they don't stop, send their email or whatever to me. I'll make sure they leave you alone. You're freaking cool and I love your content.
Man Dustin you always have such amazing content I truly do love watching every single one of your videos that's why I've been subscribed and notified for 2 years
There are many people that grow up being taught weapons are evil as well as anyone that owns one. I think it is important for us to try and empathize someone with that king of upbringing to help them understand the reality that millions of individuals own and use firearms safely legally and without hurting anyone ever, thank you for the intro.
You put yourself at a bigger risk of getting shot(one way or another) if there's a gun in your house. Accidents, domestic violence, encounters with the police, potential shootouts, suicides etc. The situations where you'd actually need one are very few if you live anywhere civilized.
@@Supernov4 You increase your chances of being injured in a car accident when you drive a car. You increase your chances of drowning when you own a pool. Your point? Those few situations you need one, having or not having one will decide whether you leave that situation alive or if you'll be getting zipped up in a bag after it's over.
@@Supernov4 buddy guns aren't inherently safe. That's why increased care is taken but like every risk factor of course that stuff goes up. I'd rather be free than safe. Civilization is an illusion created by those that rule is.
I'd like to point out that the first thing coming from the barrel when you fire a shot is the column of air in front of the bullet. It will carry debris from the barrel with it, but since the bullet forms a seal in the barrel there should be little or no hot gas in front of it.
I share the live of physics when it comes to any high energy reaction, weaponary makes up the vast majority of these. Take into account limited varables in a controlled reaction for a low expense with firearms and explosives. Simply the most efficient tools available for everday science. These cameras are amazing - Thank you!
@@christiankoch9501 Who said anything about killing, we see knives in the hands of chefs and in stores and do not think of killing although knives are used to kill around five times as many people in the US than all rifles combined including so called "assault weapons", this comes from the FBI's Unified Crime Report.
This was EPIC!!! You have forever enhanced our perception of what actually happens when we fire suppressed vs unsuppressed. To which we owe you a great deal of gratitude. Gave me more appreciation for my 300 blackout also!
I would guess that the resolution limit is more of a high speed camera thing than a schlieren thing. Veritasium has some schlieren video with amazing detail but he is not pushing thousands of frames per second.
As you increase FPS, you decrease time and light per frame. The digital sensor can only get so much information before it needs to move on. Resolution necessarily goes down.
@@jaxad0127 the photosites on the camera aren't what need a rest, it's actually the ingest speed of the RAM bank used for memory that has a hard pixels per second limit. 384*288*153664 = 16,994,009,088 pixels per second. The A/D Convertor reading off the sensor might need a bit of a rest though based on resolution.
As a RELOADER - I enjoy the logistics of Reloading, as much or more, than the Target Shooting. 🎯 And Both are a wonderful challenge. Together, it is a Complete Sport.
there's nothing wrong with firearms. they're a tool like any other, simply requiring a greater degree of care in handling, and a great respect of due to their deadly force.
There are many people who fear guns, but don't respect them. Watch that Buzzfeed video where the try guys shoot at the range. They have 2 negligent discharges.
The, suppressed, transonic bullet takes a sec to develop shock waves bc it is still in the muzzle blast and the blast is moving faster (or as fast) than the bullet. The net airflow over the bullet is kept subsonic untill the muzzle blast dissipates.
I'm personally not a fan of firearms at all, but I love watching your videos about them because it's just so fascinating to see it broken down to such a level. Whoever thinks you're "glorifying weapons" needs to take a close second look. It couldn't be any more obvious that you're just exploring the science.
people that want to be offended go looking for it, it's just the sad reality we live in, disclaimers probably don't actually do anything to detour them though so it's largely unnecessary to bother explaining intent as he did.
Great content. I especially appreciate you saying “I hope this video earned your subscription.” Honestly, I’ve been watching you for years, and the algorithm just knows it. I had assumed that I was subscribed, but saying it like that, made me look. I wasn’t. I am now. Keep this sort of stuff coming.
I've been watching your channel for awhile, and while I too share that fascination with firearms just from a scientific perspective, my family and I generally fall on the other side of the argument, socially speaking. I'm not asking what you're personal opinion on gun control is, but I do want to thank you for dispelling my concerns and reassuring me that this channel is dedicated to exploring the science and the science only, so that people of all political dispositions can learn without feeling that their beliefs are under attack. Keep up the amazing work!
You should never apologize for *anything* that you decide to study. Absolutely not. In science, no topic should be taboo. Otherwise, we are doomed to halt the progress of mankind's collective knowledge.
you should look into the physics behind the chip shot in billiards. Im curious to how it gets its height without the stick pushing up on the ball itself, or maybe it does idk.
@@Mesatchornug not by my main man here at smarter everyday haha, but i kinda assumed as much, I just thought he would have an interesting take on it. just an idea afterall.
This is one the only channel for which I have ever clicked the notification bell. Thank you, Destin, for the thought provoking content and thoughtful commentary.
Great video , getting closer to what I want to see . Now it's time to see what happens when using a muzzle brake . Specifically do those gases leaving the barrel ahead of the bullet interact with the brake causing the rifle/muzzle to move before the bullet leaves the barrel ? Then if it does can it affect accuracy or is the movement consistent enough to have a consistent POA to POI ?? Maybe even tape off or plug one side of the brake and see how much the muzzle moves to one side do to the gases leaving the barrel before the bullet ??
I'm subscribed to a lot of different youtubers but can I just say, there is something about watching your videos where afterwards it just feels good. Like I don't even know how to explain it but your channel is just amazing
You shouldn't have to have and astris at the beginning of your video to keep TH-cam from demonetizing it. TH-cam's recent seek and demonetization of firearm related videos is bothering. Doublely so when they leave them up and continue to make money off of them but don't pay the creators their fair share.
This is probably one of the top 3 channels on youtube. There should be nothing controversial about firearms, which are simply tools that use propellant to launch a projectile. We also use propellant to move pistons within engines and convert that energy into rotational energy for aerodynamic propellers, hydrodynamic impellers, wheels, and electrical generators.
Oh my god this is the video I’ve been looking for and it’s been only one day since it’s uploaded!!! I’m currently doing research for a school project and these videos have helped me a lot thank you so much!!
Actually, it's just logic that propellant will outrun the bullet considering it will accelerate quicker due to having less mass. It also slows quicker. Again, wonderful video... I want more of these! :D
Airguardian once the round gets into the riffling I am guessing the powder can accelerate faster than the round. Once past the round, the round is possibly acting like a piston to push the matter out the muzzle.
It's sad that you can't just look at these firearms as the awesome machines that they are without it having to give the caveat that you don't support the use of them to harm people. When you look at how amazing synthetic fertilizer is, you don't have to disavow the use of it as a feedstock to make munitions for war. There's nothing intrinsic to a gun that makes it evil or bad, it's how people use them, but we're so far away from people taking responsibility for their own actions that we put so much of the blame for murders onto the guns and how the murderers accessed the guns, rather than the murderers. You had a gun in your fridge in a previous video, you're a good person, the ownership of a gun doesn't affect your moral status. It's a responsibility you take on, just like owning a car or a pet dog, all of them could be lethal if you fail in your responsibility.
@@shadowxaf the fact Destin felt it was needed is what I'm lamenting, that we can't talk about how awesome a chemical reaction creating gases to propel a precisely designed aerodynamically modelled projectile out of the barrel of such a simple and elegant piece of machinery without him having to worry about it being seen as glorifying the way this has been used for evil.
Then I would suggest that actually what excites your brain is the science/physics behind the event and NOT the gun. So where do you stand? Guns for guns sake. or, Guns because they encompass such a wide swath of learning... Maybe.... naw, not likely
if i had to guess about the subsonic waves being late, i'd say it's because the supersonic threshold is specific to the reference frame of the immediate environment around the bullet. when it leaves the gun, it is surrounded by air that is moving quickly in the same direction as the bullet. for example - if you shoot a bullet INTO a 40mph headwind, the 'supersonic' threshold should be -40mph. just an intuition. Great video keep up the awesome content!
1:41 "And two: it makes me all tingly inside." Honestly one of the funniest things I've ever heard. Always enjoy your videos, and your contagious love of the subject at hand.
I wonder if the supersonic powder has something to do with why first shot on a cold can is quieter. Probably not the whole story but I bet it’s a contributing factor. A cold can was likely handled enough for unspent powder to spill out beforehand. Was this done with a cold can or had y’all already fired some though it?
I'd guess suppressors lose effectiveness because... heat energy transfers more easily when things have a greater difference in temperature, so a cold suppressor can absorb more heat energy, thus taking more energy out of the system??? but then I would assume that as the material heats up it becomes softer, making it more effective at absorbing sound energy (and turning it into heat)… so I don't really know. Perhaps both effects are at play, if the optimal operating temperature happens a few shots in? If so, this would be an interesting topic for Destin.
Correct first round is almost always louder. Have heard many theories including that it is oxygen trapped in the can that is consumed or purged after the first shot.
First round pop is noticeably present with sub sonic rounds not so much with super sonic rounds. The theory of first round pop has to do with oxygen being present. Having tested spud guns without large enough combustion chambers I’d agree with that theory.
I think you’re underestimating the intelligence of your audience. You shouldn’t have been made to feel like you needed to add the disclaimer at the beginning. I know why you thought you needed to, but don’t give in to their foolishness, buddy.
When hundreds of thousands of people watch your content, even 0.5% of your viewer base constitutes a potential for real outrage. It's dumb, but our society hasn't adapted to the reality of large numbers.
The same people that HATE firearms because they "kill people" often threaten the lives of people they disagree with...the disclaimer was most likely to help turn down their rage....the hypocrisy of people that get offended easily is pretty asinine.
Flash SUPPRESSOR vs muzzle brake in slow motion please sir, some people say a flash SUPPRESSOR can cause the projectile to slightly flip causing a wabbling effect and reducing accuracy. Can you please do a video on this?
Silencer is a 100% legitimate word to use. Ever fill out (or see) ATF silencer paperwork? Ever hear of SilencerCo? Ever look at the PATENTS for the FIRST SILENCER?
Honestly, anyone who has a problem with them can not watch the video if they have an issue. If you dont' care, love, or hate them, it's no one else's business, and no one should have any say on what you do your videos on.
Hi Destin. I am an engineer and a patent attorney, so i can appreciate enlightening scientific videos (this being one of them). I was also a soldier for several years, so i am not shocked by guns. In the past i did see some marvelous videos on your channel. I remember the ones about the fourrier transform and about the glass (prince what's it's name ) dropplet. I also admire the community work you did on some previous videos. You are a genuinely good person. That being said, and not being an American, i find the "right to bear arms" argument to be unintelligible, and i do feel uneasy with videos that popularize weaponry. That's why i refrained from watching some of your work. It is enough to see some of the comments here (e.g., "guns are cool dude") to figure out the crowd that such videos assemble. Looking forward to your next great science video !
Armed citizens are the only thing protecting the general population from a tyrannical government. This has played out countless times throughout history.
Can you find someone with a USPSA open pistol (compensated STI gun) to run through your rig? Alternately, an AR rifle comp would be really cool. I really REALLY want to see one of those monster comps in schlieren vision.
I don't believe that is the case because the Brakeout compensators have visible ports behind the flash-hiding notches. The muzzle device in the video does not have these. The device in the video appears to be an AAC Blackout 51T Flash Hider. Also, looking at the Schlieren footage, there are no distinctive shock waves or gas jets that would be consistent with the ports in the Brakeout compensator. The comp I would really like to see is the Precision Armaments M4-72 that I have gotten so much use out of or something else common like the JP 2 port compensator or the Miculek one. Also, pistol compensators have a strange mythology around number/placement of ports and about what types of powder to run through them to get maximum compensation effect, strikes me as a topic. Very interesting deep topic, especially if Destin can get to a local USPSA match and ask the guys to participate.
What are the waves coming back up at 2:49, in both the suppressed and unsuppressed videos? It's much more distinct in the unsuppressed, but definitely visible in both! And thanks for validating my own observation about fighter jet vapor cones, that's such a neat thing, and makes me shiver too!! Nice job, as always...
Fascinating stuff, this. Chase Wood, below, seems to have nailed the reason for the observation you made at 4:37. At immediate exit from the gun barrel the bullet is not exceeding the local speed of sound while transiting through the blast discharge. This sub-sonic effect could also be exacerbated by the effects of temperature and pressure which both serve to increase the local speed of sound. Once clear of the discharge blast in the unchanged atmosphere, normal , speed of sound physics applies.
In regards to powder exiting the muzzle before the bullet: It is most likely powder from the current round and not fouling from prior shoots. In firearms that are rifled there is a part of the barrel just in front of the camber (the place where the round is held) that is not rifled. This part of the barrel is called free-bore. On a .300 blackout barrel (the caliber of the rifle shown) the free-bore is about 0.1740 inch long by 0.309 wide. That gives 0.0045 inch on either side of the bullet for grains of powder to get pushed past the bullet and down the barrel. Because the powder has less mass then the bullet it will be accelerated faster then the bullet would be even though they both are being pushed by the same force, the powder burning from the primer (back of the casing) up to the neck of the casing (the front). I know this is long winded but I hope it answers the question of why powder got out in front of the bullet.
You do a good job of balancing looking at and respecting firearms, while also geeking out over the science behind them.
P.S. Got accepted at UAH!
Congratulations dude!
Grats!
Awesome, welcome to rocket school. What program?
Great video as usual! If I could make one comment, I would suggest using a singular term, "firearm." You use "weapon" in the video a few times. I feel this can bring a negative perception to out great sport as word play can be easily manipulated. Thanks so much for all your time in shooting, editing, and bringing this great videos to us!!
I agree with John, if you keep using the word firearm rather than weapon it would help prevent demonizing them
You aren't glorifying weapons, you are glorifying physics. Proper education of suppressors and firearms is important.
There is nothing wrong with that whatsoever.
Everything, what got mass can be a weapon. Physics.
Not that glorifying weapons is wrong...
"This is great! We're like, learning new stuff!"
For me, this is the spirit of this channel. Thanks for the video Destin!
Ma rapaz nao acredito, você por aqui!? Vc tb fi otimos videos! And Destin, thank you so much for all the knowledge you bring to the world... if this was about 20/30 years ago only someone that actually worked with it professionally would have the chance to visualize something like this, again thank you, you're freaking awesome! Cê tb Peste!
As someone who does ALOT of testing for silencer companies. This video further validates nearly everything that I have spent my career doing. Many things that you didn’t even scratch the surface on are present in this video. Thank you.
Sucks that you have to toss up all kinds of disclaimers regarding your choice of personal interest.
Welcome to 2019 where everyone is offended by everything. Lmao
THANX LIBERALS
@@acokedupmonkey3762 IM OFFENDED BY YOUR COMMENT
@@dphorgan It's not our fault this guy has to put up a disclaimer. Thank the NRA for constructing a massive propaganda campaign to convince people who've never read any of the federalist papers that they have an inalienable right to own a the same weapons as the military and then encouraging people with absolutely no training to impulsive buy guns and leave them laying around where children and the mentally ill can get ahold of them. That's on y'all.
@@dphorgan I"M OFFENDED THAT YOU'RE OFFENDED!!
Ok i have to make some assumptions, positive assumptions, but i love that you include your family in your videos, and how they are a part of the learning process. It speaks volumes of how well you were raised by your parents and they have to be very proud. Thank you so much for using the internet for what it was intended to do, educate on the “information superhighway” and get Smarter Everyday
Hey Destin, your friends rifle was made by a dear friend of mine. Unfortunately he passed away a few year ago. But I can tell you with certainty that he would have been fascinated by this video and all of the invisible physics you have made visible. Thank you!
RIP John.
You were friends with John Noveske??
@@Centermass762 yup. I knew him when he was still working out of his garage making custom gun barrels. Actually now that I think about it, I helped build his garage.
@@Makebuildmodify wow, that's awesome. He made some of the finest rifles in the country. I'm sorry for the loss of your friend.
@@Centermass762 Thank you. I think about him often.
The reason that the shockwaves don't immediately appear on the bullet after it leaves the muzzle might just be that the airflow in that region is also going fast and in the same direction, so that the bullet isn't supersonic relative to the air in that region
That's really good insight. The propellent itself was faster than the bullet so it makes sense that the pressure wave is moving faster as well.
That gets me thinking... If gases are trying at super Sonic speeds, and a bullet is traveling at the same speed, would we still get a pressure cone? No right? Because that pressure cone is specifically the bullet moving the gas out of the way.
That being said, does extreme temperature affect the angle of the Sonic pressure wave? Colder air being more dense and harder to travel through must be impacted more
I NEED ANSWERS DUSTIN
@@AarPlays 1) you're right, what makes an object moving sub or supersonic is his speed relative to the fluid surrounding him compared to the speed of sound in that same fluid. So a bullet can move at a supersonic speed in relation to still air, but subsonic inside the flow exiting the barrel at high speed and temperature, thus not producing a shock wave.
If you ever fly across the Atlantic heading East your plane will sometimes reach "supersonic" speeds relative to the ground while still flying at Mach less than 1, thanks to very fast winds (jet-streams) at cruising altitudes.
2) Temperature affects the speed of sound in a given fluid, augmenting four times the temperature (in Kelvin) will double the speed of sound in the fluid (~). If the bullet's speed remains the same relative to the weapon, a higher air temperature will produce a less angled shock wave, or even none at all, while a colder temperature will make the shock wave more oblique. This could also be a factor in the delayed formation of shock wave seen in the video
Very good point about the temperature, hadn't considered that as another factor!
Also interesting fact about the jet stream! Airliners cruise at something like Mach 0.7 or Mach 0.8, and some jet-stream forecast I just found shows regions moving at more than Mach 0.2 relative to the ground. I was aware of these things, but never considered that they could add up to more than Mach 1 relative to the ground.
@@AarPlays It must, that's why they list supersonic speeds at sea level and above, they're different.
Gotta love Schlieren Imagery!
.
Hey, cool setup! You can improve it though, because the light from your source travels through your shockwaves twice (once on its way to the mirror, and once when it goes from the mirror to the camera) you can see two schlieren images on top of each other, but with a small offset. By enlarging the angle between these two beams (your light source doesn't need to be next to your camera) you can make sure that the light travels through your area of interest only once, and you'll have much clearer images.
great info
Look who it is! Love your stuff
Like your channel.
Mrgunsngear doesn't like leaving anyone's channels out, he "stalks" EVERYbody!🤣LOL
Definitely! Thanks for the caliber armor discount code MGG!
You make the world a better place. Don’t ever explain yourself for any reason. You show every person, animal and idea respect. Please continue to do exactly what you have been doing in the exact fashion that you have been doing it. Please and thank you.
The fact that you felt the need to apologize for simply enjoying firearms really depresses me it's like liking firearms nowadays is a sin
Good point
Came here to post the same thing.
Me too Guns are cool!!
Thanks 🙏
Destin, I encourage you to never say sorry for including guns in any of your videos as long as you're safe with them and you're teaching us something about them. Also, don't start putting fake titles on your videos (pointing fingers at a certain TH-camr with this one, but not you).
I find the apologetic warning in the beginning hilariously wasteful of time and viewer momentum.
Your intro segment of this video is well thought out and intelligently said. I'm a firearms enthusiast and I , too, ponder the physics involved in the effects of the projectile. Not because of it being a fired bullet but the science behind it, involved in it, and how it relates to everyday things that we have no clue about. Such as aerodynamics and physics. I'm not college educated, but I am fascinated by science and mechanics. I really enjoy your videos and hopefully, I am getting smarter everyday.
Pandering to the dim witted anti-American anti-gun crowd is NOT intelligently said.... not at all.
@@CHADDERSON1 They may be wrong but they deserve respect. Don't behave like the Anti-gunners. Set a good example.
i finally figured out why you are so great to watch, other than just having overall professional content. Its because you truly love this, this is your passion and it shows. your not just tossing things together for views. i feel like even if you deleted the channel and stopped youtube. you would still be doing these kind of experiments, you cant duplicate a passion like that. it has to be genuine
I am absolutely loving these Schlieren videos!
You shouldn’t have to apologize for liking guns whether it’s for hobby or for science. Also great video. I found it strange that there was unburnt powder leaving the barrel due to its length. It wasn’t much but the company who designed the round said it should all be burnt at around 9 inches (like your friend said).
In a perfect world yeah but it doesn't mean anything that not all the powder was burned
There's tons of amazing science involved in wepons ballistics. I've never felt like you have "glorified" weaponry
Destin, Honestly, I originally found your channel through my interest in ballistics (along with several other channels I follow) and I love the content you put out. I spent 24 years working in EMS and developed a keen interest in ballistics there. Even though I left the field, the science still intrigues me (as does most science, Physics is absolutely amazing to me in general). I hope no one is hating on you for the fact that you use firearms to demonstrate the science behind ballistics, because it is a fascinating subject that doesn't require one to be a 'gun nut' to appreciate. Thanks for being awesome man!!
None of your subscribers is worried about what you cover. We're here because we like what you like! Keep up the good work!
4:30 Heh heh... The gun poot'd. 💨
@J D Destin is the one that used the word first.
Mach...Mac?
@J D Have you been living under a rock long? Poot'd has been around for a long time. I remember hearing it when I was a kid back in the early 1970's.
Its science. Pretty sure most people watching this can look past the gun debates. As a "liberal" all I can say is I enjoy guns. Keep doing your thing.
im pretty much a conservative and i enjoy guns also haha amazing we have something in common that no one else can seem to figure out haha
People are ignorant and that’s the only reason the opening comment was needed in the video. I agree with you and think it’s sad that it even need be a point. But of course some how will be offended by a video with guns they don’t have to watch.
@@aaroncockrum1004 Don't ever let people downplay that common interest. Those that desire power benefit from dividing people. Finding what we have in common and enjoying them together is how great things are achieved.
I think everyone can agree gun laws just cripple people who obey they law.
@@JamesD2957 think about it a bit, simple logic, gun laws only affect people who obey laws.
Don't worry Destin, we gotcha. I was never into science until I saw videos of yours, Michael Stevens, and veritasium. I definitely feel smarter every day. Now science to me is so interesting and fun.
Ricky Molner I hope all three of them see this somehow, getting more people intresserad in science one of the biggest points of "edutainment" so you must feel like mission accomplished for them.
Those are all of the same 3 channels that started my love for science.
h e y , v s a u c e
I thought at first this was troll comment was by Richard Mortimer.
veritasium lost my respect when he tried telling me their are more than two genders
Hi destine l doubt you will every read my comment but just on the off chance you do read it ,I just want to say thank you for your time and commitment for making these videos , the reason for my comment is I’m a 59 year old chap and that I’ve been on pain relief meds for back injury I’ve been on them for just over 14years I’ve decided to go I think the fraise is cold turkey? As I am to ashamed and embarrassed to go to my doctor,I would rather have the pain than the addiction of the opiate based meds I’ve done from just before Xmas to now I think I’m at the back end of it now I’ve past the cramps,sweats,shakes and shivers ,I guess what I am trying to say sir is through these last few weeks is, it is your hard work,commitment,passion, dedication, and your enthusiasm of your videos that has kept me focused in my little challenge to come off the nasties,and thanks to you sir I am a little bit smarter ,and also sir you have, if a may be bold enough to say you have a beautiful and understanding wife and children you must be so proud of them as they are of you , so may I finish by saying keep making me smarter through your videos ( but family comes first ) and once again thank you my dear sir for helping me in my little challenge , I must go now there’s still a few of your videos I have yet to watch. Ps please sir you and your family have a great 2019.
I really enjoyed interacting with your Schlieren imaging display at ThinkerCon. I breathed in front of it to watch the shadow of the air movement. Someone else asked me what was going on in the setup and I explained to him what I had learned in your previous video, which made me feel smart, but then I had to explain to him that I didn’t have a TH-cam channel and I referred him to your original video. (I could’ve totally stolen the credit).
Anyway, thanks not just for bringing this setup, but for making ThinkerCon possible. It was definitely one of the highlights of the year.
Thanks for being there! This is the same mirror!
Yes! I've been waiting for this video Destin. Awesome fluid dynamics.
Brainstorm grateful dead fan?
@@BothHands1 I can neither confirm nor deny these alligations.
Don't listen to people somehow saying you're "supporting guns" by doing these videos. You're examining guns, just like a statistician can study murder rates. You aren't advocating people own guns, you aren't advocating people hunt, nothing.
Yo Destin can you adopt me man? I am never behind on taking out the trash duty.
Lol... my oldest boy is pretty good at that too.
Jabrils nice to see you here, love your stuff!
This is one of the greatest videos ever to be uploaded to yew toob! You are a special person my friend but your delivery is what makes you stand out! You explain it in a way that our friends without the physics knowledge or firearms experience can retain the information!
I don’t know if your cool buddy told you or not but the Blackout round was developed to be ran through a 10.5” barrel with a suppressor! And it was AAC(Advanced Armament Corp) a suppressor company who developed it! Makes sense why it’s such a powerhouse of a round.
........At the beginning of the video.......
Only thing I can throw out on the table is do not pander to those radicals, don’t even crack that door for them! Do what makes you and yours happy and all of us hitting the like button. And if that just happens to be something legal, legitimately awesome and Christian you know you are on the right track! Keep it up my friend, God Bless!
Don't worry dude, firearms are hella interesting.
I need one for a school prodject
@@Leo-mv6ed Ha
A_person 0719 noooooooooooo
I didn’t see you as glorifying weapons. I just know your using it for an educational purposes.
Some losers attacked him personally about the ballistic vids. :-(
Jeremy C Barnhart Where did these "attacks" occur? TH-cam comments? Facebook?
I don’t mind you glorifying weapons, you need to use them against the bad guys so as to protect your family from harm. What else would you use to get these highly educational videos? You take care and God Bless you and your Family.
Your ignorant comments=Trump's presidency in a nutshell
I aggre. From everything I have seen on this channel he seem to treat the firearms with a lot of respect (or regarst for safety). The only thing I recall that would come close to irresponsibility was shooting a drone out of a tree.
Hi Destin, great video as always ! I'm an aerospace engineer and I think you are wrong trying to calculate the Mach number that way. The mach cone and the conical shock are different things, in fact the mach cone is narrower than the conical shock and it is also really difficult to see because it's really weaker than the second one. Usally, knowing the angle of the shock cone and the the curvature of the bullet it is still possible to find out the Mach number but it's quite harder than what you show. By the way I really love your videos, keep doing this stuff !!!
www.grc.nasa.gov/www/k-12/airplane/machang.html
@@smartereveryday i think what he is trying to say is that there is uncompensated error in measuring the Mach number that way. the intensity of the shock locally alters the speed of sound so the leading edge of the shock is always at a lesser angle than the stp shock would be. as the shock gets further from the bullet the intensity decreases and the limit approaches your measurement. obviously these effects scale with speed, object size, temperature, density, etc.... you get the picture. it's mostly just a technicality. and by that i mean the difference only truly matters with 'large' very fast objects where large is a reference to the amount of thermal energy actually generated by the air compression. this effect would matter a lot with hypersonic objects.
@@Unmannedair Actually I was just trying to say that the procedure shown in the video is correct only if, what you see with the schlieren technique, is the mach cone but it's not. What you see is the conical shock, that is really intense and the density changes a lot so you are able to see it. But conical shock and mach cone are two different things, the angle of the conical shock does not depend only about the Mach it also depend on the curvature of the bullet. There is still a correlation between Mach, angle of the shock and the curvature so you are still able to calculate the mach given the two angles but the relations are quite more complicated than what is shown.
@Michael Cornman Exactly, the mach cone regards small perturbations and it's quite impossible to see directly. If, under the bullet, there is a platform with holes equally spaced than when the conical shock (that moves at the same speed of the bullet) hit the holes you should see under the platform the formation of spherical waves that together create the mach cone. This is a way to actually see the mach cone and you should see that it is narrower than the conical shock. By the way you are right about the fact that you need oblique shock equations, but as you say you have to correct them. The oblique shock equations are right for a 2-dimensional phenomena and what we have is a 3D conical shock, but with some corrections what you finally obtain is quite similar to the oblique shock relations.
@@Unmannedair Type on google "A two-dimensional wedge projectile shown in the frame moving with the projectile The fig1" if you click the first result there is a clear figure that show how a conical shock and a mach cone are two different things.
That completely rocked the suppressor world for me...(in a purely vicarious suppressed and silent way) your analysis is the kind of input that will change their technology for the better. Noise suppression is a highly underrated force to be reckoned with and your video goes miles toward better understanding. Bravo... next comes the family moment in the kitchen, well that was the best product promo I have seen in a long time ... Your delivery was flawless and engaging, well done, and last but not least, big kudos the fam who under "extreme heat" did not get out of the kitchen.
Who is out there complaining about YOUR channel and YOUR content??? If they don't stop, send their email or whatever to me. I'll make sure they leave you alone. You're freaking cool and I love your content.
It upsets me that I can only like this video once.
Lucky for everyone else, you've posted this comment we can like to reinforce our own desire to have more like buttons on the video!
Me too!
@@a-blivvy-yus
And you've commented on this comment, so now we can like it too.
And now I have commented several times adding even more chances for someone to hit like buttons.
Suppressors! My favorite...A muffler for your boom stick.
Chris Wesney a 200$ one
Shop Smart... Shop S-Mart
No better words ever spoken lol...
Exhaust mufflers are actually called silencers in the UK.
@@skepticalbadger I like his analogy better lol...
Man Dustin you always have such amazing content I truly do love watching every single one of your videos that's why I've been subscribed and notified for 2 years
Destin
Destin. . . as in Florida.
There are many people that grow up being taught weapons are evil as well as anyone that owns one. I think it is important for us to try and empathize someone with that king of upbringing to help them understand the reality that millions of individuals own and use firearms safely legally and without hurting anyone ever, thank you for the intro.
You put yourself at a bigger risk of getting shot(one way or another) if there's a gun in your house. Accidents, domestic violence, encounters with the police, potential shootouts, suicides etc. The situations where you'd actually need one are very few if you live anywhere civilized.
@@Supernov4 You increase your chances of being injured in a car accident when you drive a car. You increase your chances of drowning when you own a pool. Your point? Those few situations you need one, having or not having one will decide whether you leave that situation alive or if you'll be getting zipped up in a bag after it's over.
@@Nyx_2142
The point being that the thing you have for safety is making you less safe. At least a car still gets you to places...
@@Supernov4 buddy guns aren't inherently safe. That's why increased care is taken but like every risk factor of course that stuff goes up. I'd rather be free than safe. Civilization is an illusion created by those that rule is.
@@ronaldwhitman1377
How does having a gun make you free?
I'd like to point out that the first thing coming from the barrel when you fire a shot is the column of air in front of the bullet. It will carry debris from the barrel with it, but since the bullet forms a seal in the barrel there should be little or no hot gas in front of it.
I share the live of physics when it comes to any high energy reaction, weaponary makes up the vast majority of these. Take into account limited varables in a controlled reaction for a low expense with firearms and explosives. Simply the most efficient tools available for everday science. These cameras are amazing - Thank you!
Super slow-mo is super awesome! Keep you the good work! 👍👍
super slomo suppressor schlieren
Don't be ashamed of your love for firearms. It's our second amendment right.
There is no reason to apologize.
I don't feel like you should have to justify your research. Guns are cool, and that's okay!
I think that was exactly what he was supposed to do! Gun science is cool! Killing is not.
science is a safe space in which one can speak openly about being gun-curious?
All guns are cool!
@@christiankoch9501 Who said anything about killing, we see knives in the hands of chefs and in stores and do not think of killing although knives are used to kill around five times as many people in the US than all rifles combined including so called "assault weapons", this comes from the FBI's Unified Crime Report.
@@christiankoch9501 Killing is not! Ok libtard.
This was EPIC!!!
You have forever enhanced our perception of what actually happens when we fire suppressed vs unsuppressed. To which we owe you a great deal of gratitude.
Gave me more appreciation for my 300 blackout also!
How do you increase the resolution of the Schlieren? Do you need a bigger mirror? A sharper point of light?
Ooooo. Video!
I would guess that the resolution limit is more of a high speed camera thing than a schlieren thing. Veritasium has some schlieren video with amazing detail but he is not pushing thousands of frames per second.
As you increase FPS, you decrease time and light per frame. The digital sensor can only get so much information before it needs to move on. Resolution necessarily goes down.
@@jaxad0127 the photosites on the camera aren't what need a rest, it's actually the ingest speed of the RAM bank used for memory that has a hard pixels per second limit. 384*288*153664 = 16,994,009,088 pixels per second. The A/D Convertor reading off the sensor might need a bit of a rest though based on resolution.
@@EisenFeuer Either way, only so much data can be collected per unit time. Increasing FPS decreases the unit time.
Thats great! Amazing footage Destin!👍🏼
As a RELOADER - I enjoy the logistics of Reloading, as much or more, than the Target Shooting. 🎯
And Both are a wonderful challenge. Together, it is a Complete Sport.
No explanations required. It's easy to point your interest in these areas . Great video!!
“This is insane! We’re just like, learning, like, important stuff”
I love that one.
I felt that
😁😂😂
there's nothing wrong with firearms. they're a tool like any other, simply requiring a greater degree of care in handling, and a great respect of due to their deadly force.
There are many people who fear guns, but don't respect them. Watch that Buzzfeed video where the try guys shoot at the range. They have 2 negligent discharges.
The, suppressed, transonic bullet takes a sec to develop shock waves bc it is still in the muzzle blast and the blast is moving faster (or as fast) than the bullet. The net airflow over the bullet is kept subsonic untill the muzzle blast dissipates.
Nice DP
I'm personally not a fan of firearms at all, but I love watching your videos about them because it's just so fascinating to see it broken down to such a level. Whoever thinks you're "glorifying weapons" needs to take a close second look. It couldn't be any more obvious that you're just exploring the science.
people that want to be offended go looking for it, it's just the sad reality we live in, disclaimers probably don't actually do anything to detour them though so it's largely unnecessary to bother explaining intent as he did.
Great content. I especially appreciate you saying “I hope this video earned your subscription.” Honestly, I’ve been watching you for years, and the algorithm just knows it. I had assumed that I was subscribed, but saying it like that, made me look. I wasn’t. I am now. Keep this sort of stuff coming.
I've been watching your channel for awhile, and while I too share that fascination with firearms just from a scientific perspective, my family and I generally fall on the other side of the argument, socially speaking. I'm not asking what you're personal opinion on gun control is, but I do want to thank you for dispelling my concerns and reassuring me that this channel is dedicated to exploring the science and the science only, so that people of all political dispositions can learn without feeling that their beliefs are under attack. Keep up the amazing work!
You should never apologize for *anything* that you decide to study. Absolutely not. In science, no topic should be taboo. Otherwise, we are doomed to halt the progress of mankind's collective knowledge.
you should look into the physics behind the chip shot in billiards. Im curious to how it gets its height without the stick pushing up on the ball itself, or maybe it does idk.
done right, the cue bounces off the slate. it's just an elastic collision. there are videos out there
@@Mesatchornug not by my main man here at smarter everyday haha, but i kinda assumed as much, I just thought he would have an interesting take on it. just an idea afterall.
I feel like you would love watching long range shooting. There is so much precision in chaos it’s beautiful.
Another great video. Love watching and learning. Thanks
This is one the only channel for which I have ever clicked the notification bell. Thank you, Destin, for the thought provoking content and thoughtful commentary.
If I didn't know any better I'd assume these were waterjets.
Found you!
Lmao
same
Omg new Justin is here
R u Real
Don’t apologize for your passions - stick to your guns 😁
Ohhhh I see what you did there....lmfao!
6:33 "This is insane, we're just like, learnin' like, important stuff!" Me, when I watch SmarterEveryDay every day
Great video , getting closer to what I want to see . Now it's time to see what happens when using a muzzle brake . Specifically do those gases leaving the barrel ahead of the bullet interact with the brake causing the rifle/muzzle to move before the bullet leaves the barrel ?
Then if it does can it affect accuracy or is the movement consistent enough to have a consistent POA to POI ?? Maybe even tape off or plug one side of the brake and see how much the muzzle moves to one side do to the gases leaving the barrel before the bullet ??
I'm subscribed to a lot of different youtubers but can I just say, there is something about watching your videos where afterwards it just feels good. Like I don't even know how to explain it but your channel is just amazing
Cool stuff. Thanks for making great educational stuff
thats probably the one thing thats too fast for his camera :D
Can you do shotgun in slowmotion?
super sonic buckshot would probably look pretty awesome
This.
Yup. Especially all the different types of shot.... you know slo mo dragons breath would be pretty amazing.
I feel a taofledermaus collaboration is needed.
@@andrewesther4705 truuue
You shouldn't have to have and astris at the beginning of your video to keep TH-cam from demonetizing it. TH-cam's recent seek and demonetization of firearm related videos is bothering. Doublely so when they leave them up and continue to make money off of them but don't pay the creators their fair share.
@Zero Cool But this way they can cut the creator out of ~55%. That's all profit.
This is probably one of the top 3 channels on youtube. There should be nothing controversial about firearms, which are simply tools that use propellant to launch a projectile. We also use propellant to move pistons within engines and convert that energy into rotational energy for aerodynamic propellers, hydrodynamic impellers, wheels, and electrical generators.
Oh my god this is the video I’ve been looking for and it’s been only one day since it’s uploaded!!! I’m currently doing research for a school project and these videos have helped me a lot thank you so much!!
Actually, it's just logic that propellant will outrun the bullet considering it will accelerate quicker due to having less mass. It also slows quicker. Again, wonderful video... I want more of these! :D
Airguardian once the round gets into the riffling I am guessing the powder can accelerate faster than the round. Once past the round, the round is possibly acting like a piston to push the matter out the muzzle.
It's sad that you can't just look at these firearms as the awesome machines that they are without it having to give the caveat that you don't support the use of them to harm people. When you look at how amazing synthetic fertilizer is, you don't have to disavow the use of it as a feedstock to make munitions for war. There's nothing intrinsic to a gun that makes it evil or bad, it's how people use them, but we're so far away from people taking responsibility for their own actions that we put so much of the blame for murders onto the guns and how the murderers accessed the guns, rather than the murderers.
You had a gun in your fridge in a previous video, you're a good person, the ownership of a gun doesn't affect your moral status. It's a responsibility you take on, just like owning a car or a pet dog, all of them could be lethal if you fail in your responsibility.
Dom Vasta Perhaps he should have put a preface to the caveat to let people know to skip ahead 30 seconds if they are offended by caveats.
@@shadowxafnot offended by the caveat, just sad that people feel it's even needed.
Dom Vasta the only person who felt it was needed is Destin. If you don’t like it, go back to watching videos of Richard Spencer.
@@shadowxaf the fact Destin felt it was needed is what I'm lamenting, that we can't talk about how awesome a chemical reaction creating gases to propel a precisely designed aerodynamically modelled projectile out of the barrel of such a simple and elegant piece of machinery without him having to worry about it being seen as glorifying the way this has been used for evil.
Regardless of my feelings on this, it was a great video, I never imagined you'd get supersonic unburned powder exiting the barrel before the bullet.
There is nothing wrong with liking guns just because bad people use them wrong, i love the slow motion its awesome 👍
Then I would suggest that actually what excites your brain is the science/physics behind the event and NOT the gun. So where do you stand? Guns for guns sake. or, Guns because they encompass such a wide swath of learning... Maybe.... naw, not likely
if i had to guess about the subsonic waves being late, i'd say it's because the supersonic threshold is specific to the reference frame of the immediate environment around the bullet. when it leaves the gun, it is surrounded by air that is moving quickly in the same direction as the bullet. for example - if you shoot a bullet INTO a 40mph headwind, the 'supersonic' threshold should be -40mph.
just an intuition. Great video keep up the awesome content!
Love this. Love the visual for echo.
ballistics do look the coolest in slow mo.
Hi, I'm from Brazil, I really liked the video, Congratulations.
"This is insane, We're just like learning like important stuff" haha awesome
probable the best youtube channel ever! Intelligent content, entertaining and very beautiful edited. thank you so much
1:41 "And two: it makes me all tingly inside." Honestly one of the funniest things I've ever heard. Always enjoy your videos, and your contagious love of the subject at hand.
With that lengthy disclaimer, I'm now wondering how badly TH-cam hits people with demonetization
I wonder if the supersonic powder has something to do with why first shot on a cold can is quieter. Probably not the whole story but I bet it’s a contributing factor. A cold can was likely handled enough for unspent powder to spill out beforehand. Was this done with a cold can or had y’all already fired some though it?
I've always heard of "first round pop", not it being quieter.
Yes, the first round is louder, not quieter.
I'd guess suppressors lose effectiveness because... heat energy transfers more easily when things have a greater difference in temperature, so a cold suppressor can absorb more heat energy, thus taking more energy out of the system???
but then I would assume that as the material heats up it becomes softer, making it more effective at absorbing sound energy (and turning it into heat)… so I don't really know.
Perhaps both effects are at play, if the optimal operating temperature happens a few shots in? If so, this would be an interesting topic for Destin.
Correct first round is almost always louder. Have heard many theories including that it is oxygen trapped in the can that is consumed or purged after the first shot.
First round pop is noticeably present with sub sonic rounds not so much with super sonic rounds. The theory of first round pop has to do with oxygen being present. Having tested spud guns without large enough combustion chambers I’d agree with that theory.
I think you’re underestimating the intelligence of your audience. You shouldn’t have been made to feel like you needed to add the disclaimer at the beginning. I know why you thought you needed to, but don’t give in to their foolishness, buddy.
You dont realize he's got attacks about it.
He didn't give the disclaimer because he "felt" someone was upset..
He gave it because losers WERE upset.
Why does it matter? Just because people are offended it doesn't mean he should care
When hundreds of thousands of people watch your content, even 0.5% of your viewer base constitutes a potential for real outrage. It's dumb, but our society hasn't adapted to the reality of large numbers.
The same people that HATE firearms because they "kill people" often threaten the lives of people they disagree with...the disclaimer was most likely to help turn down their rage....the hypocrisy of people that get offended easily is pretty asinine.
Thanks for your shows Mr. Sandlin. Gives the joy of a perfect new pop song to lip sync with from your favorite singer.
That was great! Seriously, educated me more this morning. I love the slow motion.
I'm always game for gun science!
Flash SUPPRESSOR vs muzzle brake in slow motion please sir, some people say a flash SUPPRESSOR can cause the projectile to slightly flip causing a wabbling effect and reducing accuracy. Can you please do a video on this?
I agree, please
I think the unsuppressed rifle had a flash hider on it. Probably a quick detach 3 prong one for use with the can.
@@colsoncustoms8994 yeah I think that it does however I'm talking about the a2 type that doesn't release the gasses evenly around the barrel
gotcha, yeah that would be interesting to see as well
@@colsoncustoms8994 It had an AAC Brakeout comp on it.
First, there's nothing wrong with liking weapons.
Second, thank you for calling it what it is... A suppressor.
@Zero Cool No, I know... It was more of a general statement for others.
Silencer is a 100% legitimate word to use. Ever fill out (or see) ATF silencer paperwork? Ever hear of SilencerCo? Ever look at the PATENTS for the FIRST SILENCER?
Honestly, anyone who has a problem with them can not watch the video if they have an issue. If you dont' care, love, or hate them, it's no one else's business, and no one should have any say on what you do your videos on.
Hi Destin.
I am an engineer and a patent attorney, so i can appreciate enlightening scientific videos (this being one of them). I was also a soldier for several years, so i am not shocked by guns.
In the past i did see some marvelous videos on your channel. I remember the ones about the fourrier transform and about the glass (prince what's it's name ) dropplet.
I also admire the community work you did on some previous videos. You are a genuinely good person.
That being said, and not being an American, i find the "right to bear arms" argument to be unintelligible, and i do feel uneasy with videos that popularize weaponry. That's why i refrained from watching some of your work. It is enough to see some of the comments here (e.g., "guns are cool dude") to figure out the crowd that such videos assemble.
Looking forward to your next great science video !
Armed citizens are the only thing protecting the general population from a tyrannical government. This has played out countless times throughout history.
Can you find someone with a USPSA open pistol (compensated STI gun) to run through your rig?
Alternately, an AR rifle comp would be really cool.
I really REALLY want to see one of those monster comps in schlieren vision.
The gun on the right has an AAC Brakeout QD compensator on it.
I don't believe that is the case because the Brakeout compensators have visible ports behind the flash-hiding notches. The muzzle device in the video does not have these. The device in the video appears to be an AAC Blackout 51T Flash Hider.
Also, looking at the Schlieren footage, there are no distinctive shock waves or gas jets that would be consistent with the ports in the Brakeout compensator.
The comp I would really like to see is the Precision Armaments M4-72 that I have gotten so much use out of or something else common like the JP 2 port compensator or the Miculek one.
Also, pistol compensators have a strange mythology around number/placement of ports and about what types of powder to run through them to get maximum compensation effect, strikes me as a topic. Very interesting deep topic, especially if Destin can get to a local USPSA match and ask the guys to participate.
"This is insane! We're just like learning like important stuff!" Spoken like a true scientifically curious mind!
"This is insane! We're just learnin', like, important stuff."
What are the waves coming back up at 2:49, in both the suppressed and unsuppressed videos? It's much more distinct in the unsuppressed, but definitely visible in both!
And thanks for validating my own observation about fighter jet vapor cones, that's such a neat thing, and makes me shiver too!!
Nice job, as always...
Fascinating stuff, this. Chase Wood, below, seems to have nailed the reason for the observation you made at 4:37.
At immediate exit from the gun barrel the bullet is not exceeding the local speed of sound while transiting through the blast discharge. This sub-sonic effect could also be exacerbated by the effects of temperature and pressure which both serve to increase the local speed of sound. Once clear of the discharge blast in the unchanged atmosphere, normal , speed of sound physics applies.
"we're like learning, important stuff!"
6:33 My reaction watching all of your videos.
So true
"THIS IS INSANE! We're just, like.... learning, like, important stuff." ~Destin, SmarterEveryDay 2018
@Ungregistered User No, I meant 6:33
"#2 it makes me all tingly inside"
🤣😂🤣🤣
Brilliant stuff! Thanks again.
In regards to powder exiting the muzzle before the bullet:
It is most likely powder from the current round and not fouling from prior shoots. In firearms that are rifled there is a part of the barrel just in front of the camber (the place where the round is held) that is not rifled. This part of the barrel is called free-bore. On a .300 blackout barrel (the caliber of the rifle shown) the free-bore is about 0.1740 inch long by 0.309 wide. That gives 0.0045 inch on either side of the bullet for grains of powder to get pushed past the bullet and down the barrel. Because the powder has less mass then the bullet it will be accelerated faster then the bullet would be even though they both are being pushed by the same force, the powder burning from the primer (back of the casing) up to the neck of the casing (the front). I know this is long winded but I hope it answers the question of why powder got out in front of the bullet.
I WOULD LOVE TO GO WAY MORE INTO DEPTH ON THIS SUBJECT. FOLLOW UP VIDEO PLEASE!