I've seen a few people on here ask question as to what exactly this is, how it works, and some of those questions were quite recent, so I'll try and explain this in easy terms. What you've got in there is a fire that's been starved of oxygen. They closed off the doors and windows, and the fire soon uses up whatever oxygen was in the air in there. For flames/combustion to occur you need fuel (the wood they have in there), energy (the heat of the fire) and oxygen. No oxygen means no flames - BUT the massive heat and smoke remain, and the smoke is building up. The interior is now at higher pressure than the outside atmosphere due to the heat and smoke build up, which you can see by that smoke venting through whatever cracks there are. You open a door and, as you can see in the video, all that heated gas pours out because there's a high pressure inside, remember? But at some point after you've opened that door, the pressure equalises. Oxygen from the outside can now enter, which is what he refers to when he says "now there's an opening". Once enough oxygen hits that atmosphere all those heated gasses inside can now combust - with the spectacular result you see here. What the instructor is teaching here is looking for and recognising the right "signals" in the smoke in order to realise this room they've simulated here is posing a backdraft risk. Pulsating, dirty white-ish smoke coming out of any small crack is a cardinal sign, often likened to cauliflower or jellyfish in appearance. I hope this helps!
Honestly, I'd argue that a backdraft is more dangerous to firefighters than flashovers albeit this is coming from a non-firefighter. Flashovers are extremely easy to spot and prepare for if you know the signs but backdrafts are borderline completely unpredictable. Also unlike a flashover, there is no way of avoiding a backdraft. A flashover could be avoided if you instantly hit the deck but a backdraft is gonna hit you no matter what.
I would think with a flashover you have immediate ignition the moment air is brought in, where with backdraft it is a low temperature condition where air and smoke freely mix for a time before an explosive ignition through a secondary source.
@@lorddrayvon1426 Backdraught is extremely predictable in most scenarios. If you are aware of the history of the fire (All windows and doors closed, fire been burning for a while) and can see these symptoms like pulsating fire gases from cracks around windows and doors then the danger can be mitigated. As you saw in the video the reaction isn't instantaneous once the compartment becomes ventilated so as long as you are aware that you have a backdraught scenario then you can manage it effectively.
@@billdang3953 because it’s so heroic going in and risking your life for an inanimate object. Get them going on medical calls and actually living up to their title of first responder then we’ll talk heroic. Sincerely a paramedic
absolutely correct ventilation is key to get rid of the gases and smoke. plus firefighters that may be inside a structure will be able to have possibly some vision being low to the floor as possible doing a search or combating the fire from inside.
Read the smoke - it is telling you what is about to happen...and where you don't want to be. When they re-opened the door after letting the pressure build - Smoke is coming out and moving up at a rapid pace....but if you look at the bottom of the opening, you can see smoke going in. Then Whoooosh! Interesting setup they have. It worked very good for this demonstration.
I was going to say "that would throw a guy a couple hundred feet through a car windshield, killing him instantly" (reference to the Backdraft movie), and i wasnt disappointed.
i have new respect for the firefighters here, that building was loud and instantaneous: they never took their eyes off of it, i assume they were ready to hit the deck in a split second to avoid the possible blast
That's exactly what happened to me when I was getting my charcoal grill ready to cook some steaks. I got the charcoals started and closed the lid thinking I had enough ventilation but nope! Came back outside to check if the charcoals were ready, opened the lid and I had a ball of fire in my face. My hair and eyebrows were smoking. All I seen was orange flames. My daughter was out there at the time when it happened laughing her ass off. 🤣🤣 I never did that again. That shit was scary as hell. Live and learn.😂😂😂
This is behaving just like a bitumen boiler fire when the lid is used to cover it. Same shape / type / colour of smoke. . . only much bigger. Whodathunk?
Alright, so in this video they show a backdraft in action, my only question is how do you "fix" the problem without causing a backdraft to happen? Or do you simply wait for the fire to die
I was expecting a backdraft to occur as soon as that front "window" was opened, but it didn't happen until several seconds later. Can anyone explain the reason? Was outgoing smoke so thick that it was delaying incoming air getting in? Thanks!
I think inside was too oxygen depleted and it took a while for enough oxygen to get back in and mix with the smoke to ignite... if something is too fuel rich it won’t ignite right away.
This could actually be an instance of ventilation induced flashover, which is often mis-labeled as backdraft. A backdraft will almost instantly happen when oxygen is introduced and requires enough oxygen to be introduced to a fire. A backdraft also needs the heat content to be at a level where the oxygen is the only thing needed for the event to happen. A ventilation induced flashover is exactly as Jeff explained, the fire basically resumed development once the door was opened and looks like a backdraft with these conditions once the fire flashes over.
A backdraft is a dramatic event caused through rapid re-introduction of oxygen to combustion into an oxygen-depleted environment in a fire; for example, the breaking of a window or opening of a door to an enclosed space. Backdrafts present a serious threat to firefighters. Source: en.wikipedia.org/wiki/Backdraft In the video, they close all the doors to the space, depriving the fire of oxygen. Then they open the door and you can see the lower area is sucking in oxygen. Once the space has enough oxygen, you have a room with an oxygen fuel mix. The fuel is the smoke from the smothered fire which is flammable. In the final moments, that mixture ignites and rapidly burns.
+LTZ VIDEOS. what's happening is when all the hatches are closed the fire dies down to a smolder and cooks the flammable materials making them release their flammable gasses. when a hatch is opened some of said gasses rush out from the pressure, but once the pressure between inside and outside is equal air begins to be drawn in, once the air and the combustable gasses reach an explosive ratio... kaboom.
joe carmack your fire service you work for should provide this training all the new recruits we have come through the doors get this training before they even go out into the public as a firefighter you need to ask about it as this is vital to save your life
@@MrJoevette05 That's pretty much what a backdraft is, yes. The fire lacks oxygen, so the flames go out, BUT there's still a ton of heat in that room, smoke/gas keeps building up. As soon as you open a door or a window, you add oxygen to the mix, and all of the heated gas that has built up ignites again. And in this case, they gave themselves a little more time. This is basically opening a window to the room - because the gas is under pressure, it expands outward first (pressure inside higher than outside), but as soon as enough gas has escaped and the pressure more or less equalised (the 'gap you can see right before it happens), fresh air comes in, remember it's still super hot in there, and there you go. It happens faster if you open up a larger area - if they had opened the door fully, the backdraft would've happened faster as there is more room for gas exchange to happen. Basically, if you suspect there's a fire behind a closed door or window, DO NOT OPEN IT.
@@dastardlybadger the flame source doesn't go out in a backdraft. After the door is opened, an explosive mixture starts to form until it touches the flame source. A ventilation induced flashover like you're describing isn't about explosive gas mixtures necessarily, just materials above their flame temperature with no oxygen
The container is just a tool that’s used to force a backdraft to happen. It teaches the signs of a backdraft situation and helps train firefighters to recognise when this might happen. Meaning they can tackle the fire appropriately, while keeping everyone as safe as possible. Any well established fire that’s been starved of oxygen can/ will do this regardless of where the fire this.
Galactic Tuna Fire is beautiful. I have no desire to burn a dwelling or cause anyone harm. Fire is extremely dangerous and destructive. It also is beautiful.
Cool video, but was anybody else focusing more on wth dude was saying, rather than watching the fire? Dude sounds like he is from deep wood TN or back wood NO! Lmao!
I've seen a few people on here ask question as to what exactly this is, how it works, and some of those questions were quite recent, so I'll try and explain this in easy terms.
What you've got in there is a fire that's been starved of oxygen. They closed off the doors and windows, and the fire soon uses up whatever oxygen was in the air in there. For flames/combustion to occur you need fuel (the wood they have in there), energy (the heat of the fire) and oxygen.
No oxygen means no flames - BUT the massive heat and smoke remain, and the smoke is building up. The interior is now at higher pressure than the outside atmosphere due to the heat and smoke build up, which you can see by that smoke venting through whatever cracks there are.
You open a door and, as you can see in the video, all that heated gas pours out because there's a high pressure inside, remember? But at some point after you've opened that door, the pressure equalises. Oxygen from the outside can now enter, which is what he refers to when he says "now there's an opening". Once enough oxygen hits that atmosphere all those heated gasses inside can now combust - with the spectacular result you see here.
What the instructor is teaching here is looking for and recognising the right "signals" in the smoke in order to realise this room they've simulated here is posing a backdraft risk. Pulsating, dirty white-ish smoke coming out of any small crack is a cardinal sign, often likened to cauliflower or jellyfish in appearance.
I hope this helps!
Thanks! This is probably the best explanation of this I've seen!
nothing like getting blown off your feet and possibly severely injured because of it
Honestly, I'd argue that a backdraft is more dangerous to firefighters than flashovers albeit this is coming from a non-firefighter. Flashovers are extremely easy to spot and prepare for if you know the signs but backdrafts are borderline completely unpredictable. Also unlike a flashover, there is no way of avoiding a backdraft. A flashover could be avoided if you instantly hit the deck but a backdraft is gonna hit you no matter what.
I would think with a flashover you have immediate ignition the moment air is brought in, where with backdraft it is a low temperature condition where air and smoke freely mix for a time before an explosive ignition through a secondary source.
@@lorddrayvon1426 Backdraught is extremely predictable in most scenarios. If you are aware of the history of the fire (All windows and doors closed, fire been burning for a while) and can see these symptoms like pulsating fire gases from cracks around windows and doors then the danger can be mitigated. As you saw in the video the reaction isn't instantaneous once the compartment becomes ventilated so as long as you are aware that you have a backdraught scenario then you can manage it effectively.
The sound of the pumping appliance ticking over brings back so many memories to this old firefighter 😁
Doesn't matter what country is what, firemen of all countries are practically heroes.
I think the hero worship is overblown and dumb
Not practically, they are heroes
@@gwynm8506 Also remember what somebody said about firefighters "Real men run into burning buildings".
@@billdang3953 because it’s so heroic going in and risking your life for an inanimate object. Get them going on medical calls and actually living up to their title of first responder then we’ll talk heroic.
Sincerely a paramedic
@@joshlee7935 fascinating
So this is probably why firefighters put holes in a roof and smash out windows?
absolutely correct ventilation is key to get rid of the gases and smoke. plus firefighters that may be inside a structure will be able to have possibly some vision being low to the floor as possible doing a search or combating the fire from inside.
only dumb ass firefighters smash out windows
@Simon Carstensen Incorrect.
@@jf3823 not absolutely correct
@@zigaselanmelavc3986you are wrong. I bet you dont know anything about firefighting
Read the smoke - it is telling you what is about to happen...and where you don't want to be. When they re-opened the door after letting the pressure build - Smoke is coming out and moving up at a rapid pace....but if you look at the bottom of the opening, you can see smoke going in. Then Whoooosh! Interesting setup they have. It worked very good for this demonstration.
Training, learned from bitter experience, that saves lives. Good instruction too.
3:19 when Santa falls in the chimney
farts* in the chimney
3:15 .. This is what we All came here to see.
Also, his voice quality was really low, was hard to hear.
That is so cool. Fire is such a beautiful, but deadly thing. Watching this backdraft is amazing how it just flashes over in an instant.
I think that the fence needs to be repositioned.😂😂
Agreed
"It's a living thing Brian."
You can here it breathe
@@marcd.1837 Stupidest movie ever made
Slow Mo Guys anybody?
Yep
Your wish was granted they definitely did one
ua-cam.com/video/ZyCCWuO0mQo/v-deo.html
3:18 HADOUKEN!!
TurkishChubs 波動拳！！
HADOUKEN is LOL
😂😂😂
🤣🤣🤣
@ 2:39 Look at the colour of the smoke it's green brown it is going to blow
Maaaannn... I was expecting an explosion that would ....
.... As i was typing that, an explosion happened. Lol.
Lol
I was going to say "that would throw a guy a couple hundred feet through a car windshield, killing him instantly" (reference to the Backdraft movie), and i wasnt disappointed.
😂😂😂😂 same. Soon as I was ready to be disappointed lol (awwww man 😔) my patience paid off lmao
i have new respect for the firefighters here, that building was loud and instantaneous: they never took their eyes off of it, i assume they were ready to hit the deck in a split second to avoid the possible blast
That's exactly what happened to me when I was getting my charcoal grill ready to cook some steaks. I got the charcoals started and closed the lid thinking I had enough ventilation but nope! Came back outside to check if the charcoals were ready, opened the lid and I had a ball of fire in my face. My hair and eyebrows were smoking. All I seen was orange flames. My daughter was out there at the time when it happened laughing her ass off. 🤣🤣 I never did that again. That shit was scary as hell. Live and learn.😂😂😂
Bro, exact same thing happened to me. The fireball could have taken out my eyes but luckily I wear glasses. My eyebrows and eyelashes were singed.
Raúl Jaramillo D 👍
I love the instructor
Mother in law found her laundry room on fire and opened the door- whammo- huge backdraft. They got out but lost the house.
It’s hard not to instinctually open the door, glad they got out
The Dragon was just waiting... to breathe. The Dragon is very patient. Sooner or later, he will breathe. Respect the Dragon.
I heard of the movie called Backdraft but I never knew it was holy , How does a fireman know when it’s going to happen
빽드리프트 현상으로 건물 안에 발화가 극심한데 문을 다 밀폐시켜 연소 작용할 산소가 부족한 상태로 가스가 축적돼있다가 다시 공기를 주입하면서 축적된가스와 공기가 만나 폭발하는 현상
This is behaving just like a bitumen boiler fire when the lid is used to cover it.
Same shape / type / colour of smoke. . . only much bigger.
Whodathunk?
消防士のみなさん、日頃こんな危険をはらんだ現場で消火活動してんのか...
命懸けなのが改めて実感させられる。
Fyi, when this happens in the scale of a whole burning building this has the power to destroy brick walls.
Meilleure vidéo expliquant ce phénomène. Merci 3:20
That’s the longest train I have ever heard, geez what was the noise in the background? Impressive backdraft
It's a fire appliance pump ticking over, ready for use for fire suppression.
That was a sick vape trick bro.
Beautiful Demonstration
I remember this movie, I went to see it twice or even 3 times I was captivated by the backdraft scenes.
Alright, so in this video they show a backdraft in action, my only question is how do you "fix" the problem without causing a backdraft to happen? Or do you simply wait for the fire to die
これは意図的に実験でやってるけど、もしも実際の家で起こったら怖いな
Wow! That was facinating, although also scary as heck
Scary, but great training!
that was a nice demonstration of a backdraft
merci c est beau
That Backdraft. Same one with Slow mo channel
Never face a back draft without your hard hat
3:19 fus ro dah!
support your local firebrigade !
Slowmo guys did an episode on this, you should check it out
How Big was the Dragon Inside
When yuo see the theory front of yuo materialize... é sempre bom voltar as aulas, aos treinos rsrsrsrsrs
I was expecting a backdraft to occur as soon as that front "window" was opened, but it didn't happen until several seconds later. Can anyone explain the reason? Was outgoing smoke so thick that it was delaying incoming air getting in? Thanks!
I was wondering the same thing
I think inside was too oxygen depleted and it took a while for enough oxygen to get back in and mix with the smoke to ignite... if something is too fuel rich it won’t ignite right away.
This could actually be an instance of ventilation induced flashover, which is often mis-labeled as backdraft. A backdraft will almost instantly happen when oxygen is introduced and requires enough oxygen to be introduced to a fire. A backdraft also needs the heat content to be at a level where the oxygen is the only thing needed for the event to happen. A ventilation induced flashover is exactly as Jeff explained, the fire basically resumed development once the door was opened and looks like a backdraft with these conditions once the fire flashes over.
@@jy8992 I think you have the terms backwards
@@sdcrym you could be right, it’s been a while! In any case, they are similar events, but not quite the same.
3:18 Katon Gokakyo no jutsu!
🤘😉👉Their a move to Backdraft that is good too✌😇👍🕊
3:19 looked like a jet engine
Por qué cambio el color del humo al cerrar las puertas
That was a good one.
すべての扉を閉じて一時的に炎が消える所、”潜む”って感じで怖すぎる。
People run from danger ....heros run towards it
Watch the final moment in slow motion.
Why is the smoke white instead of black?
Me trying to control the temp on my smoker
A spokesman for the South Wales Fire Brigade said… “fucking hell”… 😉😂
😂😂😂
Backdraft kills the fire faster the firemen.
This is like the hot house of my neighbor. They are high after
feh, still weaker than my fart
ahahaha
😡💨
Tanta contaminación solo para que salga esa explosión
No mam.n
Best experience
What happened on final? Someone explain to me please?
A backdraft is a dramatic event caused through rapid re-introduction of oxygen to combustion into an oxygen-depleted environment in a fire; for example, the breaking of a window or opening of a door to an enclosed space. Backdrafts present a serious threat to firefighters.
Source: en.wikipedia.org/wiki/Backdraft
In the video, they close all the doors to the space, depriving the fire of oxygen. Then they open the door and you can see the lower area is sucking in oxygen. Once the space has enough oxygen, you have a room with an oxygen fuel mix. The fuel is the smoke from the smothered fire which is flammable. In the final moments, that mixture ignites and rapidly burns.
Basically an explosion of overheated gases
+LTZ VIDEOS. what's happening is when all the hatches are closed the fire dies down to a smolder and cooks the flammable materials making them release their flammable gasses. when a hatch is opened some of said gasses rush out from the pressure, but once the pressure between inside and outside is equal air begins to be drawn in, once the air and the combustable gasses reach an explosive ratio... kaboom.
3:20 exactly what it looks like when the mother-in-law enters our home! 🤔🤔
True
Where do I get this class? Presumably, I’m a firefighter already and could benefit from this training. Thank you.
joe carmack your fire service you work for should provide this training all the new recruits we have come through the doors get this training before they even go out into the public as a firefighter you need to ask about it as this is vital to save your life
Alguien sabe cómo se llama a esa reacción y porqué se ocurre?
3:15
최윤민 real mvp
Thnx mate
No harm for train service above this place?? lol.
This was fucking cool 😂🔥🔥🔥
not so cool mate
Knowing this can safe lived
Muito top! 👏👏👏👏👏
FUS RO DAH
YOL TOOR SHUL*
Wait for it...wait for it!😲
Wow. That’s intense
Can someone with an adult volume voice please try to explain.
Eric I may be mistaken but I believe when flame is smothered out and then gets a source of fesh air it's explodes with vengeance.
@@MrJoevette05 That's pretty much what a backdraft is, yes. The fire lacks oxygen, so the flames go out, BUT there's still a ton of heat in that room, smoke/gas keeps building up. As soon as you open a door or a window, you add oxygen to the mix, and all of the heated gas that has built up ignites again.
And in this case, they gave themselves a little more time. This is basically opening a window to the room - because the gas is under pressure, it expands outward first (pressure inside higher than outside), but as soon as enough gas has escaped and the pressure more or less equalised (the 'gap you can see right before it happens), fresh air comes in, remember it's still super hot in there, and there you go. It happens faster if you open up a larger area - if they had opened the door fully, the backdraft would've happened faster as there is more room for gas exchange to happen.
Basically, if you suspect there's a fire behind a closed door or window, DO NOT OPEN IT.
@@dastardlybadger the flame source doesn't go out in a backdraft. After the door is opened, an explosive mixture starts to form until it touches the flame source. A ventilation induced flashover like you're describing isn't about explosive gas mixtures necessarily, just materials above their flame temperature with no oxygen
Where his helmet ? ?
So you can create a back draft opening even opening the front door/window?
Yes
日本じゃこんなラフにできぬ
Holy fucking fuck balls batman!
the container trying to blow Os lol
Realistic???? How many well developed fires in storage containers do fire fighters go to ???
The container is just a tool that’s used to force a backdraft to happen. It teaches the signs of a backdraft situation and helps train firefighters to recognise when this might happen. Meaning they can tackle the fire appropriately, while keeping everyone as safe as possible. Any well established fire that’s been starved of oxygen can/ will do this regardless of where the fire this.
Just wow.
WHOOMP
wow, that's... scary
So after the backdraft, does the fire go out? or does the pressure building start again?
The fire keeps going and the pressure only happens when the gas has nowhere to go so it shouldn’t build pressure.
It'll burn itself out cause it'll run out of fuel
Most likely the explosion would break things enough to cause the fire to be more ventilated. But it's possible under certain conditions
That is fuckin scary.. wow
is the Asian guy from Yorkshire or something
Sounds Welsh to me
Raúl Jaramillo D 👍
Parece um tiro de canhão nuuu
Fire is beautiful
HR Guy v
Galactic Tuna Fire is beautiful. I have no desire to burn a dwelling or cause anyone harm. Fire is extremely dangerous and destructive. It also is beautiful.
senai alguem
Cool video, but was anybody else focusing more on wth dude was saying, rather than watching the fire? Dude sounds like he is from deep wood TN or back wood NO! Lmao!
I ❤ physics
Kurt russel ssssaaaavvveeee mmmeeeee
The instructor sounds like a horse racing commentator
Wooow! 👌😯
Whoa.
А я думал рыбу коптят
Was that a scouse Asian 😂 awsome
oh my.
Fire Ball dhakare na
Caracter of fire
와.. 마지막 엄청나네!!!
??????