Sewer Explosion Tests - Mythbusters - S07 EP15 - Science Documentary
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- Опубліковано 19 лют 2024
- Witness MythBusters Adam and Jamie conducting explosive experiments in this action-packed episode. First, they delve into the myth of sewer explosions, testing if methane can turn manhole covers into missiles. From small-scale trials to a full-scale sewer build, the team explores various scenarios, including closed systems and blockages, to unveil the explosive truth. Then, Carrie, Tori, and Grant take on the fan-favourite myth: Can a truck bedliner make your car crash-proof? High-speed crashes, dog bites, and more put the bedliner to the ultimate test. Buckle up for adrenaline-pumping experiments and jaw-dropping results!
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Join the MythBusters in their thrilling quest to debunk myths, challenge urban legends, and test movie scenes in this action-packed TV series! With hosts Adam Savage and Jamie Hyneman leading the charge, buckle up for a wild ride as they employ rigorous scientific methods, high-octane experiments, and jaw-dropping explosions to uncover the truth. From epic car stunts to mind-blowing special effects, witness the power of scientific inquiry as myths are either confirmed or shattered. Get ready for an adrenaline-fueled adventure filled with excitement, humor, and the ultimate quest for knowledge. Tune in now and unlock the secrets behind the myths!
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A 37 year old dad is now enjoying this with beers and snack while the kids are sleeping! What a great evening!
sounds like a great time :)
And what a great show it was I mean them man hole cover blew my expectations also 😂
A 31 year old dad is also doing the same lol 😅
34 yo man confirms: myth about nostalgia is true
Same!
And a beer to Grant on every episode, he had some nice ideas and was a smart guy.
its sad he went so young.
Adam: woah! amazing! gee! cool! That exceeded my wildest expectations!!
Jamie: That was significant.
😂
I’ve used this video to make improved potato cannons, I now put chicken wire into the combustion chamber and I get a more complete burn, and in turn higher muzzle velocity.
Are you using metered fuel? That also makes a great improvement.
So cool. Potato cannon operator here. Cheers.
Don't use butane mixtures, mine exploded 😮
Great minds think alike. That was the first thing I visualised, hair spray-orange gun in our case.
@@teresashinkansen9402 I mainly use deodorant as fuel, if I’m feeling adventurous I use nitrous oxide and propane, I have to make sure the cannon has a strong enough for that first
Best Busters archive on UA-cam. 👍 👍
indeed. they also own the rights to Mythbusters. so its gonna stay up forever!
I second this.
Wait... this channel, banijay science owns rights to Mythbusters?
@@DrozGodhammeryes they bought the rights!
@@dace8030YOOO, WHAT?
I thought I quickly needed to find a good youtube video downloader!
I still want a good youtube video downloader :c
Explosive manhole covers are most often caused by city gas leaking into electric service utility vaults and duct banks. So most often it’s not sewers and methane, but natural gas, which is even more reactive and flammable. And short circuits and small discharges happen all the time in high-voltage cables.
31:50 The officer gives german commands to a german shepherd 😅
jepp, sounds like a. a tradition and b. so possible no one else could call the dog off. But... except me.. I speak german.😀
I tried speaking Slavic to my Siberian Husky to control her, she started threatening me instead...
It's a common practice to teach commands in german or dutch to duty dogs. So there won't be any confusion during for example casual talk or someone would try to throw commands as a joke.
@@ThePolishDonut so thats why my german dad teaching his dogs english commands, i never thought about that
What's also a possibility is that the dog was raised and trained in Germany or Austria and then sold to another country. I live in Bavaria and there are some dog training centres which do this.
Should have covered the sewer in bedliner. ;)
and sprayed Grant as well
@@annax5212I interpreted your comment a whole different way, sadly. I didn’t realize you were referring to the car crash test. I thought you meant in a protect-this-man-at-all-cost kind of way. RIP Grant.
@@kantahanwithkahel I am shocked to have heard just now about Grant ...He was the best
@@annax5212 Because I’ve been rewatching these episodes sometimes I forget that he’s passed. The build team had such great chemistry.
How about testing if a car door covered in bedliner becomes bullet proof?
The sound of the manhole covers hitting the ground was intensly satisfying
I think I will coat my house in bed liner..... 🤓😉
Tori crashing the sides of the car reminded me kf the car crash scene in malcolm in the middle lol 😂
I thought this was to do with the pascal b nuclear test where there was a myth that it reached escape velocity and shot into space but was later debunked that anything travelling so fast in the earths relatively thick atmosphere, the manhole cover would have been vaporised.
It would not have been vaporized as it would pass through the atmosphere too quickly to vaporize.
@angusmatheson8906 yeah the final conclusion I heard was that there was very probably a quite warped, half melted man hole cover speeding off around the sun as it easily reached earth escape velocity. I hope that's correct - I love the idea that it is still out there in sun orbit.
@@WillArtie it actually would achieve interstellar velocity.
@@WillArtie I'm not 100% on that, but I seem to remember that the math had it leaving the solar system.
@angusmatheson8906 oh yeah... maybe you're right. lol I can imagine some other civ coming across it "oh, another man hole cover. someone else has atoms sorted.."
Super! Thank you very much!
In a few of these common fail compilation videos I saw such a sewer explosion.
You see the dashcam perspective of a car driving down a rural american road. And then suddenly **BOOM** all manholes spit small bits of mud (or poop?) about ten metres into the air. The manhole covers themselves didn't go flying, but they didn't lay perfectly on the holes anymore either.
12:05 you might have a look underneath the bumpers (maybe the totall car for that matter) i mean, the bedliner seals of all and is strong. And yet, i’m curios how everything looks underneath the bedliner
exactly what i was thinking
the bumper underneath is absolutely cracked just as the uncovered portion, they said it themselves, its elastomeric, or stretchy, its not a shock absorber and you can see during the slow motion front bumper test it flexed quite badly. All the bedliner did was flex with the bumper but since its elastic it just popped back into place and looked untouched. While the bumper underneath still took all the force of the impact. In the side door crash test you can see the results clearly, it kept with the door however the bedliner looked "untouched" and clean, with smoother looking dents than the wrinkled plain side.
@@rhysbrauersmith2078 Was the application of bedliner not super thick too? Could convince me it's 10mm thick looking at some of the slowmo angles, guessing they did that to give it the best odds considering how unlikely it was? Or is bedliner usually applied that thick? lol
27:43, a equilateral triangle would do as well... but would be weird😂
Yes!
you coated the bumper in bed liner, then crashed it and it looked fine !! but was it ? i mean what was the bumper under the liner like ? doesnt matter what you coat that car with, the impact energy has to go some where, if the car takes zero damage then every ounce of the impact energy has to go into the driver .. so its not a matter of can this stuff stop the damage its more like do you want it to
Seeing grant doing what he loves makes you think. Bless him. So sad. ❤
German shepherd taking commands in proper language :DDD
Kari was looking great here 😍
RIP grant we miss you badly.
Do you think he knew but just didn't tell anyone to not have them worry or sympathize? R.I.P but it's a question I've wondered
Aneurisms can be treated. I had an great uncle who died during the procedure, but he was well into his 90s. Grant was much younger. Though I don't exactly know how treatable his aneurism was. @@topaz123212
@@topaz123212he died of an aneurism. It’s not like you see those coming!!
@civicrocker honestly have never dealt with this kind of thing, but I thought there were early signs. Too bad though.
Forget gas explosions ... Small potatoes. Many, many years ago sitting down to Sunday roast whilst it was raining cats, dogs cows and horses (this was in my home town on the coast of South Wales ... Only Ireland's West coast is wetter) and without warning a loud bang and the manhole cover right outside our house, about 40 feet from our dining room window, shot into the air by about 40 feet, followed by a thunderous roar as a two foot six diameter column of water spewed into the air almost as high!
We lived on a hill, almost at the bottom with several hundred houses above us (max 120 feet above) with all their groundwater feeding into the main drain running downhill outside. I dread to think what might have happened had a vehicle happened to pass at the very moment it exploded! 🤔🙄😱😱
You haul 6 tons and what do you get? Another day older and deeper in debt? No! A Mythbusters sewer!
That was meant to be 16 tons, bloody key board
Great; well done.😂😂😂
There is the myth that the man hole Cover above a underground nuclear Explosion went into space when they detonated the Nuke
Now that would have been the ultimate Mythbusters episode,
but from what I remember, it's pretty much certain, that that "manhole cover" (lid)
just got vaporized.
"Can you get that kind of mayhem sitting on the toilet?" ... Well "Am I missing an eyebrow" if I remember correct was a toilet explosion of sorts.
I wonder what the volatile organic compounds are for bedliner.
Fascinating.. did that police officer use german commands on a german shepherd (Fass, Aus, Platz,...) ... =)
16:16 the presence of the blockages and debris (springs) also facilitated better mixing of air and methane in the pipe compared to the unblocked sewer, therefore, larger boom. It is a similar concept with plug flow reactors in chemical engineering.
Seemed a little dubious there would be that much debris filling up most of the entire thing.
How thick was the bed liner on the ply and cinder block walls ?
Methane explosions in mines are almost 100% fatal. In polish mines, several dozen miners die every decade due to such explosions, even though security systems are in place.
@ Artur Rehi bedliner is blast resistant
Awfully risky to put Grant in the car and having him ram into the barricades, couldn´t they have tested it another way?
If it was awfully risky for him, they wouldn't have done it. Of course they could've tested it with a remote rig of some sorts but that's not as much fun to watch. Provided the likelyhood of injury is very low, they do it. Now, have they done things that turned out dangerous in the moment? Oh hell yeah, saw Grant nearly eviscerate himself once in an episode but it was also because they were DIY-ing the living shit out of an idea and he came up with something ridiculous. Overall, they ensured they always did things safely... ish.
Every experiment is strictly controlled by a safety team and insurance company. So if it would have been too dangerous there would have been no way they could have done it.
Fass!!! Aus!!! Platz!!!
Bedliner might be blast resistant, but I think calling it blast-proof would need some sensors to prove that Buster was safe from the shockwave behind it. They really only looked at the physical damage to the walls and their impact on Buster, not the explosion's impact on Buster.
I have a Mythbusters inspired idea.
Im watching MB today, looking out the window at the snow and all the tree litter in my yard.
Picture a potato gun that shoots pykrete-like projectiles. I feel like a mulch of leaves, branches/twigs, bark chips, coniferous tree needles, and cones mixed with water and frozen might work. You could easily mould these 'bullets', freezing the mixture in a section of pipe. One could improve accuracy by rifling the PVC barrel.
Of course, I would use some type of mesh in combustion chamber.
Get a license and permit for that. It sounds dangerous and possibly illegal depending on where you are. Sounds cool, though. Good luck, be careful!
I was walking early one morning in Manhattan, a couple of blocks below Canal street, and a manhole cover blew about 15 feet in the air like a 200 pound tiddly wink. Made quite a noise, too. It happens in NY pretty often in the days after a heavy snowfall, and the root cause is salt water getting into the under ground power lines. What I think is happening is that the power electrolyzes the water and produces hydrogen and oxygen. The explosions are a fact---the explanation is by me.
29:37 Sounds like an Epic Meal Time video
How it's monetized and not cc claimed?😮
when i grow up i wanna be a bedliner expert
As a just-for-the-heck-of-it bonus, they should have repeated the sewer test with acetylene: It’s waay explosive, across a wide range of concentrations. It wouldn’t be any realistic replication of anything, it would have been great fun making an even bigger explosion :-)
Maybe this Ep was the cause of Grant's Aneurysm? 12:00
i have seen manhole explosions. specialy in Marseilles. a heavuy raining day. rain falling in the mountain behind the city. and all the cloaks on the way down collects the rainwater. and they all lead downwords down the same cloaks. all the water presure and the manholes jumps maybe up to 10 meters.
Gettin' down and dirty with manhole missiles sounds so wrong.
if you build this in vegas someone will live in it!
Ya Jaime, Adam's hat is weird. ooh lala lol
If they would have added a few pins or wires inside the open system it would have made a nice effect
this was fun to watch, but giving terrorists idea's to safeguard the spec ops from breaching lol
Sad thing they didn't manage to film the full flight of manhole covers. They just didn't expect them to go that high.
Can a bullet goes through deadliner?
The whole culvert may weigh 16 tonnes but per section. No way.
A bit surprised, and slightly disappointed, that they failed to have (or at least didn't show) a "wide shot" of the "sewer explosion" where You could see the whole sewer AND the full trajectory of the manhole-covers !!???
In 1996 a car in our street had an overnight petrol leak from it's tank which leaked directly into the drain at the roadside, the car had around 10 gallons of fuel in the tank.
Around 10am there was an almighty explosion which actually ripped up part of the pavement, 4 manhole covers were sent flying, one of them hitting a brand new car.
In 2 of the houses the blast caused water and fumes to explode from the toilets.
Luckily no one was harmed, but yip the underground sewage system can explode violently under certain conditions.
You are making that up cause there isn't anywhere near enough fuel in a car to fill up a sewer. Also gasses from the sewers won't come up through the toilet, it's specifically designed to prevent that. You need to drop something in the toilet itself or otherwise the strain will be taken by the bolts.
A real sewer explosion was in 1992 in Mexico where gasoline leaked in through a broken fuel line and we are talking thousands of gallons here. After leaking in for weeks it exploded with a tremendous amount of force ripping open streets, throwing cars in the air, and collapsing buildings throughout 3 blocks. The official death count is 212. Looking at pictures it's like a bomber had gone through or there had been a heavy earthquake. A famous picture is of a semi that was thrown on top of a 2 story building.
Large scale methane explosions in sewers are very rare though because methane is very picky with it's flammability range and since it's so light it wants to rise to the surface so if there is any way for it to escape it will.
"there isn't anywhere near enough fuel in a car to fill up a sewer" I wouldn't be so sure.
Back of the envelope calculation. 10 gallons is about 30 kg fuel. Molecular weight petrol is say about 120 on average. SO about 250 moles. 1 mole of a gas at STP occupies 22.4 L, so about 5,600 L of vapour. The lower explosive limit for petrol is 1.3% So if that 5,600 L was a bit over 1.3% of the total volume we can get an explosion. Total volume would be about 430 m3, or 15,000 cubic feet. It seems plausible that a local section of sewer could be of these dimensions. @@MrMarinus18
Did the trainer spoke German with the dog??
Well yeah it's a German shepherd... you expect him to understand English?
@@Nison545 Why not? I am German and I understand English. 😁😁
Try flushing a bottle of sodium metal down the toilet.
It has very dramatic consequences.
Note to self when building apocalyptic concrete bunker…
Why did they need to force a non fitting coat on tory and not just put grant in it. Dont get why they always have to try and hurt tory.
Though I feel it's a scam that car bumpers crack at 6mph. I think they should be able to get scratched and maybe dented but no more. I feel car companies do that on purpose to make you spend more money on repairing your car.
The crack probably wouldn't happen with bumpers that didn't sit outside in the sun and maybe freezing conditions for years, but plastic that sat open to the elements for a while tends to become brittle
When adhd meets the 'tism.
Should of use a cane corso or kangal both those dogs bite with 745psi not a piddly 400 lol
I hope one day MrBeast gather theese guys for one more myth to bust
That German Sheperd is actually German or at least German-trained as it seems, as the handler uses commands like "Platz!" and "Aus!" XD
it's fairly normal to train service dogs in German, it's due to how German words are "pronounced" there's less room for ambiguity and confusion.
And fyi Dogs usually respond better to single syllable commands/names
That's because the pig is a fascist who fetishises Nazis.
This myth actually happened in South Africa except the whole sewer blew up😂
in our village with new years eve we do carbid schieten its dutch tradition where u use carbide in a stone form put in a old milk can but some guys put like 10kg of it in the sewer 1 toilet of a reastaurant whas blown in to the ceiling the whole street about 282.72 meters long all the man hole covers and small covers drains blasted couple of meters like 20ish in to the air luckily no one whas harmed later it whas discovered that a backblast fail save has been removed like a 1 way door in the sewer and the owner of that restaurant used some sort of cleaning chemical cautex soda or something like it that cleans pipes and can gass
oyeah and in same video u can see the street aswell i think because of the bridge there is some kind of block and that made exploson possible
24:02 Did Jamie do a dab there? Or am Ijust imagining things?
Can a nuclear bomb set off under a manhole cover cause the manhole cover to reach escape velocity out of the atmosphere?
Yes I know of the US test site incident,
Concrete funnel and manhole cover at the top, nuke at the bottom of the concrete vertical tunnel,
Not if they spray bed liner on it 😊
ok, but what about womanhole covers .. is that safe to blow ?
@18:20 please Mythbusters, stop murdering physics...force is not and has never been measured in joules 😥😭😖
I have to laugh at US "building code"... Man, it's poor...
you know crashing a car in revearse wearing a crashelment is asking for a sore neck , theres a headrest there he could have raised to prevent such a sore nect , thats why manufactures put them there ya dipstick ...............oh P.S. when doing a frontal crash allways keep yure thumbs on the outside of the steering wheel . double dipstick ....
You could have shown the insights of the sewer afterwards
Bed liner? It was invented by Fred Flintstone, protecting his bad rock.
Love the fact that way back when they were filming Jamie was right no recorded sewer explosions from natural cases... Now in 2024 We do have bunch or recorded cases from all over the world where sewers do actually blow up with even bigger booms just because how people changing their ways about what is dumped down the drain.
I'd do this job if given the budget and insurance flexibility... producers, im here in Guam. 🤗
that is an actual german dog, the command the officer gives is german, "fass!" "platz" and "aus" all german words used in dog training
MM = 33
The dog is wrongle trained and the handler is also iproper trained.
For the dog to react faster it's ... Fass, Aus, Sitz, Platz. Not Fass, Aus, Platz.
This why its wrong. The natural reaction in a dog when attacking is run, bite, pull up, left, right and down. So when you say Platz, the animal will lay down and not have the impulse of letting loose. In the contrary to Sitz, the animal has to let go in order to acheve the automatic survsilence position. After the Sitz you say Platz zu get the animal to submit and relax. This is the proper way to train a dog. My father was the yungest recoconised trainer in germany at the time teceving tecognition of the german chanceler for the achevment. My childhout was dog training.
As far as the handler is concerned. He was not authority emogh and had little controle over the anal, tgat can leed to mistakes and serious injury in real life. Who will get punished? Both but only one will lose there life. Guess who. This is unacceptable and the american dog handler association in contract with the gouverment should be held responcable to implement proper training methods.
Honesty i would judge the proformance put to show hear as adequit at best. There is muche to improve. This is upseting to me.
As far as the contend of the program is concerned, enjoyed it verry muche.
what do you expect when you let a pig handle a dog, you should see how my cat handled my dog (RIP Kitty you died to young age 22 😥).
By far the worst subtitle work ever!
Why is the officer talking German to a Belgian Sheppard? 🤣
Do they think because it's a supposedly "German" you have to talk German to them?
And it's clearly not a pure German Sheppard, those darker colored ones with slightly smaller ears are the Belgium veriant!
So maby he should learn some French! 😂
Logistics, if you use the same language as your spoken language for commands then you could issue a command by accident. If you use a different language then every command will require conscious effort, so no mistakes.
back when tv was worth watching