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?
@@okaybutlike The Kingdom of God is at Hand John 3:16 King James Version 16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
The Kingdom of God is at Hand John 3:16 King James Version 16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
The Kingdom of God is at Hand John 3:16 King James Version 16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
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
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.
@@TheCalamityCain The Kingdom of God is at Hand John 3:16 King James Version 16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
Rollover: 7:50, the combustible particles of the smoke on the lower side of the cloud ignite due to it having access to oxygen, and then move to a nearby exit as that It the flow of the smoke, causing flames to shoot out of the windows. It might confuse people as to where the actual source of the fire is from. 10:47 Flames on the lower part seem to be taking an inflow of air to the need for oxygen. 11:20: the environment is hot enough to spontaneous combustion but not enough oxygen is there. 12:55, Flash Over with a subsequent back draft 13:10 Same. Then the roll over begins anew 13:50 Flash Over once more.
I'm no firefighter but having read some fascinating comments, would a good example of backdraft be found in The Towering Inferno? You know the bit - where the lovers are trapped, he dies trying to run through it, she then struggles and gasps for air and in desperation throws a chair at the window and breaks it? Remember? The oxygen-deprived fire then literally "explodes" and she hurls herself out of the broken window! This to me seems entirely plausibke - after all, people jumped from the burning Twin Towers ( rest in peace all of them ) . Nobody jumped from Gtenfell though as far as I'm.aware. But , given the chance , they would have done. There is something Biblical about fire, and besides being inordinately painful, people prefer to plunge to their deaths rather than being consumed in it. Sorry to be morbid.... Perhaps you pro firefighters out there could confirm whether TTI depicts backdraft accurately or not? Finally, bless all the firefighters of the world - who continue to put their own lives on the line in order to save ours - and defend our property. Our gratitude is limitless. Thank you !
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.
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.
It's Little Inferno, it's Little Inferno just for meeeee, I 've got a fireplace, that burns at a hundred million degreeeeesssss, it's Little Inferno just for meeeeeeeeeeeeeeeee!
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?
I'm writing a class on setting/grading different levels/types of smoke. Would it be possible for me to use your video in my class. This is one of the best simulator videos I have found.
Fire is good for heating, cooking cutting steel and in internal combustion engines otherwise it shouldn't be messed with. Its dangerous, unpredictable and deadly. Thank God for highly trained firefighters and rescue personnel.
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.
+Skylar Van Ekelenburg it's rolling over as you see the flames start to head across the ceiling. Flash occurs around 9:10 when the 'coffee table' catches. Backdraft around 11:55.
+Skylar Van Ekelenburg Rollover is very visible by the @ 4:45 mark (probably even earlier, but it's harder to see in this simulator because it has such a short distance to travel). Flashover occurs @ 9:10 and backdraft occurs @ 13:13 and 13:49.
at 6:45 there is a flame over. A flame over is when the gases near the ceiling ignite. The flash over occours when the whole room is engulfed in flame. when the neutral layer drops it causes a flash over and multiple materials ignite and spontaneously combust. the flash over occurs from the beginning of 9:00 to 9:30 you will see these phases
The scale of this model is not really good for a rollover demo or even flashover because of the scale and lack of contents. Flashover would have occurred earlier. But dead on the backdraft and the growth of the fire in the compartment you can clearly see the air track moving oxygen towards the fire. Very nice 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.
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.
@@superjunior3122 Yeah, but look at The Station fire...it didn't melt til the building was entirely aflame. And they all said it didn't BREAK, either. The small panes of glass at the bottom did, not the Plexi. They were smacking them with chairs and everything. Plus, they were blocked by pool tables.
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.
Quantum Information when the smoke at the top of the box gets hot enough to ignite and turn to flames, that is rollover. The cloud of smoke eventually turns into a flames.
If that was a real house, what would we be doing right now? Letting it burn! Put water on what's burning and none of this will happen. Cool the ceiling with water while you are looking for what's burning. LOOKING for these symptoms is playing with the fire. Water, Now!
Ok guys. Time for an education from someone who has been involved with fire since 1963. Burning buildings, brush and forest fires, fireplaces and chimneys. Oh and a Lot of experience with the relationship between burning material and water. The job of a fire fighters is to stop what's burning AND protect property. Don't think of anything else, just stop stuff from burning while protecting everything around the fire. Water, has been proven to stop things in a structure from burning. To get it done fast to protect the structure and possessions and prevent that dreaded Steam for cooking you, you have to Quickly Over Power the burning material with a superior amount of water. You have to cover the widest amount of square feet at one time while still overcoming the energy of the fire or wind. You wouldn't want the water blowing away.If you can See what's burning like an attached garage or a room that is fully involved with fire and the windows have broken out, you want to STOP the fire before it damages any more property or threaten lives. Make believe this is your house and your dog and kids are in there along with your prized set of golf clubs that took you ten years to put together. Ok, your wife too. Oh and you have no health, life or fire insurance. Forget your training, what would you do? You would Stop That Fire Right Now. Why? Because even if you knew where they were, you might not be able to get to them before the fire did. Your training as it is today, would Kill Them. Again, Why? Because it would take too much time while you LET the fire burn to get dressed, pull hoses, hook up the hydrant, grab tools set ladders to vent the roof, break down the door, then pull that hose through thick black smoke that even the home owner could get lost in. I know what I would do. I would lay the hydrant line out and stop the truck, activate the pump and hit the burning material with the deck gun on tank water until the Flames were out. The flames and smoke are the killer.. It's the fastest and largest tool you have. In 5 seconds you have knocked the crap out of the fire by soaking a large amount of burning material and the threat has been reduced by 85%. You don't waste time with a list of things you learned in training that have nothing to do with stopping the threat and protecting lives and property. If the fire can't be seen from the outside after a 360, then you have to look for it and put water on it. Let's say you have no idea where it is but you see smoke coming out of every orifice in the building. You work your way up from the bottom. Break out the Upper sashes at rooms on the First floor where you can See heavy smoke. Not in rooms that seem to be unaffected. That will release the Pressure that the burning material created. The fire will NOT burn toward this oxygen source. You open the front door, bring a charged line inside and look for burning material and OVER POWER IT so it stops burning Fast. Solid streams do not do that. Cover as much material as possible. You Want steam? Take your time soaking it. You want to avoid steam, soak it all Fast with a 35% cone of water and wave it around. As soon as the "Steam" has no more heat source, it just becomes humidity. You have to Maintain a heat source to maintain steam!!! When you get to the top floor, cut a small hole in the ceiling and see if there is fire showing or at least a lot of heat rather than just smoke. Open the nozzle to a 50% cone, shove it in the hole and wave it around. Do this in a couple of locations. Someone can be on a ladders opening up the gable end vents to help eliminate the smoke and humidity. STAY OFF OF THE ROOF OF A BURNING BUILDING!
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
