I'm studying to become a firefighter so I'm still learning, please let me know if I got something wrong! 6:40 - Rollover - the flames, rich in vaporized combustible, are hot enough to ignite itself, releasing a lot of heat, contributing for the next step 7:15 Obs. This goop on the glass is soot + water, combustion products, and it will take over the whole glass until the end of the video. 9:06 - Flashover - the room is so hot that even the material that is not near the fire focus gets hot enough to ignite. This usually takes just a second to ignite the whole room. 11:18 - Obs. They tried do do a backdraft but there was not enough heat yet, maybe if they had left it burning for a few more seconds would be enough, who knows. So they add heat 'artificially' to get to the ideal point. 12:00 - Flameover - here you can see the smoke getting out of the container is burning by itself. Just the contact with O2 is enough to burn it. It's a sign that the smoke is hot and concentrated enough so a backdraft is around the corner. 12:54 - Backdraft - They closed the container and the fire extinguised because of the lack of O2. But the smoke is so hot that when they open it again, the container "sucks" the air rich in O2 and the backdraft happens. It's probably one of the most dangerous moments for the firefighters. More OBS. the smoke is with high concentration with CO, which is a product from incomplete combustion (complete combustion product is CO2, not inflamable). CO has a high inflamability range (12% - 74%) and is a reason to the blackness and density of the smoke. Edit: I passed the exam btw
@Space Face I guess that's it. The rest of the container wasn't hot enough yet, or this setup was releasing a lot of smoke so it wasn't radiating as much heat as it would if it was trapped.
I'm currently studying Forensic Science in the Netherlands and this information is very usefull with my upcoming exam about fire investigation. But I was also thaught that a rollover = flameover?
At Cocoanut Grove an exhaust fan pulled the fire INTO the building. So, use caution. They work GREAT, but you'll neved hear a smoke alarm if you're moving lots of air.
This is one of the reasons why modern HVAC systems have smoke detectors that sample the air passing through the ducting. Of course if the structure is more of an industrial site using large exhaust fans, or is more of an open environment such as a hangar or partial wall warehouse or processing facility, there should be a detection system using optical fire sensors to offset the high air exchange rate. Cooking exhaust fans or those that handle any partial flow, other than just air, should use some form of heat sensor or thermal linkage to detect a fire and trigger an alarm or preferentially a suppression system. If you are studying the design of fire and smoke detection systems, pay attention to the machine vision aspect of your optical sensors, there should be full coverage of the protected space by a minimum of two sensor heads and the system programmed to interlock for two separate optical sensors triggering before suppression event occurs. A single optical sensor head detection may be sufficient to trigger alarm activation, depending upon local code.
Great work. Can anyone explain me the terms because I am not familiar with terms of fire development as rollover, flashover, backdraft and bradverloop. Thank you. BTW what material is inside of the metal box? In the side part has a hole to simulate a window ? How can I built a fire simulator ? What is in front transparent, quartz glass ?
Back draft is when a rush of oxygen enters a burning room which has had its oxygen deprived by the fire within. Suddenly the oxygen starved fire is fed, and it basically explodes. This usually happens a few seconds after a window breaks or someone opens a door. Not sure about the other terms......rollover looked like it might have been the point when strong convective currents started vertically circulating the flames through the room, but that's a total guess.
Travis’ explanation of a backdraft is great, along with the time stamp. Rollover occurs around the 6:32 mark. Rollover occurs when the flames ‘rollover’ the ceiling and you have flame blanketing the ceiling of the structure/floor. Flashover occurs around the 9:10 mark. This happens when the room temperature reaches 1100 degrees farenheit (temperature where most things combust) and the flame will grow exponentially. Notice in the moments leading up to flashover that you have 2 columns of flame out of the side hole. When flashover occurs, you have heavy flame showing. Material inside the box looks to be some type of OSB or particle board. The side hole is to simulate a window or venting. I’m sure there are plans online but I would be very careful as you can induce backdrafts easily if you’re not sure what you’re doing.
Nothing about this video's title or thumbnail implies birds are in the video. So the birds, being an unexpected element by which you intend to draw an absurdist joke, would be highlighted by saying "I came for the fire, but stayed for the birds". You got the elements reversed. But nice try.
Wow pretty cool and amazing how it shows why to stay low to the ground and crawl before the fire obviously catches the whole room on fire. It's amazing while the backdraft happens when its searching for oxygen and once it does it just erupts
They're close to the right track. What they're trying to show and do would probably work with a larger model. People with lack of experience will not see the science of a true backdraft, flash or rollover on this small a scale.
@A Karma, with respect, a larger model would make little difference for inexperienced people’s understanding of the science behind these phenomena. I couldn’t really see the pyrolysis occurring but apart from that, the demonstration was pretty clear. As the fire developed, the “white smoke” water vapour and carbon dioxide was being released from the fuel. It took some time for the fire to develop but you could clearly see the neutral plane getting lower in the compartment. You could clearly see flames in the over pressure. You could see the colour of “smoke” unburnt products of combustion become darker. It was difficult to observe pyrolysis as the glass was dirty by that point but shortly after, the flashover was observed. It was “cheating” to remove the oxygen from the compartment by blocking the exhaust with a sheet of wood but it demonstrated what happens to an under ventilated fire when a source of oxygen is introduced to a fairly innocuous looking situation. A very good demonstration on a small scale.
Is there away you could let me know how you built this? Great way to show my crew what a flashover is and does, would love you recognize your prop that could help others to understand signs and save lives.
it's probably just some sheet steel welded up into a box with an acrylic removable front window and a hole cut in the side for ventilation. would probably take less than an 2 hours to fabricate one providing you have all the materials ready.
Solowarrior1221 I burned about 30 simulators to get the result in the video shown. The biggest challange was not to built the simulator but to get the fire load en the size of the ventilation opening right.
Great to see the development of the fire from the cross section view, any chance the video could be reedited to include the thermocouple temps in the bottom left corner?
VlogCandy Legacy Continues Backdraft occurs when the fire used up all available oxygen in the room, making it an oxygen depleted environment, which doesn't allow for combustion, so it's just smoldering. The moment you open a closed window or door to that room, all the oxygen rushing it sudden fuels the fire igniting all the gases that didn't completely combust before, now ignite with the sudden reignition of the fire
Yellow smoke under pressure. Not good.
My first attempt at baking cookies went the same way.
How do you make something so interesting so boring
Id rather see the birds. yawn
13:29 It's amazing that the guy in the box never seems to burn
12:50 backdraft
Narration dubbed over the video would have made it much more powerful.
12:50 and backdrift
I'm studying to become a firefighter so I'm still learning, please let me know if I got something wrong! 6:40 - Rollover - the flames, rich in vaporized combustible, are hot enough to ignite itself, releasing a lot of heat, contributing for the next step 7:15 Obs. This goop on the glass is soot + water, combustion products, and it will take over the whole glass until the end of the video. 9:06 - Flashover - the room is so hot that even the material that is not near the fire focus gets hot enough to ignite. This usually takes just a second to ignite the whole room. 11:18 - Obs. They tried do do a backdraft but there was not enough heat yet, maybe if they had left it burning for a few more seconds would be enough, who knows. So they add heat 'artificially' to get to the ideal point. 12:00 - Flameover - here you can see the smoke getting out of the container is burning by itself. Just the contact with O2 is enough to burn it. It's a sign that the smoke is hot and concentrated enough so a backdraft is around the corner. 12:54 - Backdraft - They closed the container and the fire extinguised because of the lack of O2. But the smoke is so hot that when they open it again, the container "sucks" the air rich in O2 and the backdraft happens. It's probably one of the most dangerous moments for the firefighters. More OBS. the smoke is with high concentration with CO, which is a product from incomplete combustion (complete combustion product is CO2, not inflamable). CO has a high inflamability range (12% - 74%) and is a reason to the blackness and density of the smoke. Edit: I passed the exam btw
@Space Face I guess that's it. The rest of the container wasn't hot enough yet, or this setup was releasing a lot of smoke so it wasn't radiating as much heat as it would if it was trapped.
Nice
@@fernandolopes3556 fala guerreiro
hmmm. i was taught in fire 1 that a rollover and a flameover were the same thing?
I'm currently studying Forensic Science in the Netherlands and this information is very usefull with my upcoming exam about fire investigation. But I was also thaught that a rollover = flameover?
At Cocoanut Grove an exhaust fan pulled the fire INTO the building. So, use caution. They work GREAT, but you'll neved hear a smoke alarm if you're moving lots of air.
This is one of the reasons why modern HVAC systems have smoke detectors that sample the air passing through the ducting. Of course if the structure is more of an industrial site using large exhaust fans, or is more of an open environment such as a hangar or partial wall warehouse or processing facility, there should be a detection system using optical fire sensors to offset the high air exchange rate. Cooking exhaust fans or those that handle any partial flow, other than just air, should use some form of heat sensor or thermal linkage to detect a fire and trigger an alarm or preferentially a suppression system. If you are studying the design of fire and smoke detection systems, pay attention to the machine vision aspect of your optical sensors, there should be full coverage of the protected space by a minimum of two sensor heads and the system programmed to interlock for two separate optical sensors triggering before suppression event occurs. A single optical sensor head detection may be sufficient to trigger alarm activation, depending upon local code.
Hello, I am teaching a lecture about fire fighting in Korea. This video is the perfect data I've been looking for. Can I use this video by any chance?
Yes you can.
Thank you so much🙂! Have a nice day :)
Woooooooa👊👊👊👊👊👊👊👊
You also have inception/growth/fully developed/decay phase really good video in doing minrescue very accurate video of what's in the book
The breath u can See is amazing...that looks so beautiful
Did the young man in cardigan sweater survive?
Yep, he’s alive and well….
6:00
A voiceover would be helpful...
Now here’s a relaxing training video!! You’ve got natures symphony playing in the background. 🥰
Got have nice soothing sounds to go with your fire safety lessons.
What type of glass front is this? Where can I get it?
I can't tell, what were they baking in the kiln?
i dont get it... for me is all the same. except a back draft.
The smoke is burning.
Just curious couldn't co2 be injected into the space in large quantities but opening to air
But not
Y’all live in the rainforest?
I think you mean fire simulation
Great work. Can anyone explain me the terms because I am not familiar with terms of fire development as rollover, flashover, backdraft and bradverloop. Thank you. BTW what material is inside of the metal box? In the side part has a hole to simulate a window ? How can I built a fire simulator ? What is in front transparent, quartz glass ?
Back draft is when a rush of oxygen enters a burning room which has had its oxygen deprived by the fire within. Suddenly the oxygen starved fire is fed, and it basically explodes. This usually happens a few seconds after a window breaks or someone opens a door. Not sure about the other terms......rollover looked like it might have been the point when strong convective currents started vertically circulating the flames through the room, but that's a total guess.
13:05 is the backdraft demonstration
Travis’ explanation of a backdraft is great, along with the time stamp. Rollover occurs around the 6:32 mark. Rollover occurs when the flames ‘rollover’ the ceiling and you have flame blanketing the ceiling of the structure/floor. Flashover occurs around the 9:10 mark. This happens when the room temperature reaches 1100 degrees farenheit (temperature where most things combust) and the flame will grow exponentially. Notice in the moments leading up to flashover that you have 2 columns of flame out of the side hole. When flashover occurs, you have heavy flame showing. Material inside the box looks to be some type of OSB or particle board. The side hole is to simulate a window or venting. I’m sure there are plans online but I would be very careful as you can induce backdrafts easily if you’re not sure what you’re doing.
Thank you for explanations!
Fantastiese demo meneer, dankie.
When is flashover? When is the backdraft? No subtitle, so confusing...
Rollover happens first, then later flashover occurs. A while later the backdraft happens. I’d have to rewatch for the exact moments on the clock.
I came for the birds but stayed for the fire.
Nothing about this video's title or thumbnail implies birds are in the video. So the birds, being an unexpected element by which you intend to draw an absurdist joke, would be highlighted by saying "I came for the fire, but stayed for the birds". You got the elements reversed. But nice try.
I really thought that was the size of a bedroom, and had a second of vertigo when the guy's hands come in lol
My new favorite Yule Log video 😉🎄
what size is box and type of glass I want to make one for my station to to training?
Me too
Wow pretty cool and amazing how it shows why to stay low to the ground and crawl before the fire obviously catches the whole room on fire. It's amazing while the backdraft happens when its searching for oxygen and once it does it just erupts
th-cam.com/video/GV8sSUcFae8/w-d-xo.html
exelent
They're close to the right track. What they're trying to show and do would probably work with a larger model. People with lack of experience will not see the science of a true backdraft, flash or rollover on this small a scale.
@A Karma, with respect, a larger model would make little difference for inexperienced people’s understanding of the science behind these phenomena. I couldn’t really see the pyrolysis occurring but apart from that, the demonstration was pretty clear. As the fire developed, the “white smoke” water vapour and carbon dioxide was being released from the fuel. It took some time for the fire to develop but you could clearly see the neutral plane getting lower in the compartment. You could clearly see flames in the over pressure. You could see the colour of “smoke” unburnt products of combustion become darker. It was difficult to observe pyrolysis as the glass was dirty by that point but shortly after, the flashover was observed. It was “cheating” to remove the oxygen from the compartment by blocking the exhaust with a sheet of wood but it demonstrated what happens to an under ventilated fire when a source of oxygen is introduced to a fairly innocuous looking situation. A very good demonstration on a small scale.
Wow..great,,,, place s I t possible that we t gapppens n an open area,,or it must be enclosed within th few openings for oxygen?
Algún tutorial para diseñar la caja?
Do you live in the Amazon?
this comment didnt age well
@@johnnyaddams4728 lmao
Hawaii?
Rollover starts at 6:34, flashes at 9:10.
Joseph Medina thank you my good sir!
Rollover?
@@NikosKatsikanis you can notice the flames kind of "dancing" in the upper layer, below where the fire is touching the Ceiling
Thanks
">Oh boy! Mayhem!" Lol
the flame coming out of the left outside of the box is entrainment. smoke is flammable and this is the smoke combusting and fire traveling through it.
11:58 OMG! there's someone in the box...oh the humanity
i cry every time
Have you seen the Hindenberg fire? It was something else. Live. Too.
Is there away you could let me know how you built this? Great way to show my crew what a flashover is and does, would love you recognize your prop that could help others to understand signs and save lives.
Can you tell me how you made or where you got this box from?
it's probably just some sheet steel welded up into a box with an acrylic removable front window and a hole cut in the side for ventilation. would probably take less than an 2 hours to fabricate one providing you have all the materials ready.
Solowarrior1221 I burned about 30 simulators to get the result in the video shown. The biggest challange was not to built the simulator but to get the fire load en the size of the ventilation opening right.
Great to see the development of the fire from the cross section view, any chance the video could be reedited to include the thermocouple temps in the bottom left corner?
13:05 for backdraft
thanks mike
i know why backdraft occur if you let a fire in an oxygen rich area it will get fed up and kaboom!
Opposite... If you let oxygen into a flammable area it will ignite.
VlogCandy Legacy Continues Backdraft occurs when the fire used up all available oxygen in the room, making it an oxygen depleted environment, which doesn't allow for combustion, so it's just smoldering. The moment you open a closed window or door to that room, all the oxygen rushing it sudden fuels the fire igniting all the gases that didn't completely combust before, now ignite with the sudden reignition of the fire
Pretty sure the technical term is WOOOOMFFAAAA
Is that pyrex or something? No way is that regular glass. Lol
Good video
Hi, great job ! Can you explain how did you build this "training fire box" please ? and what kind of glass did you use ? from an oven maybe ?
Hello, would you please so kind a post a construction guidance or something similar? I interested in building such a simulator. Thank you.