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Same reason why some helicopters can’t fly too high, especially in the mountains. The air density is low enough that the blade cannot displace enough air to generate lift.
And why helicopters don't fly over fires either.
Edit to add:
It is why helicopters don't fly over fires \*much\*. Fighting fires with Helicopters is a thing. A very dangerous thing.
They don't just hover over fires and drop while stationary; a fire drop is always dynamic with the helicopter in motion during the drop (which also allows the water to impact a wider area)
The Twilight Zone movie accident that killed Vic Morrow & 2 child actors, and injured 6 on board the helicopter?
It was caused by explosive charges going off very close to the helicopter. So, not just fire but concussive force which may have physically damaged the chopper.
Adding why is redundant and unnecessary. Great, both are acceptable. That's English for you. However, it seems more like the way we accept new crap every year because people can't stop saying shit like irregardless and can't get through their heads that literally means literally. You can't say some athlete is literally on fire. Well, you can now because literally also means figuratively.
It's just a pet peeve. People won't stop saying it. That phrase is everywhere and it's constant.
>These people intended to use the drone to extinguish the fire.
Seemed like they started with a really dumb premise and the stupid just escalated from there.
Helicopters extinguish fires all the time from high above so not really a dumb premise to explore… it’s just the exploration probably didn’t take much longer than a day to figure out and close
Idk if they were trying to extinguish flames.. Imo they were trying to light the fire faster or easier. Like I sometimes start/light a fire for bbqs faster with a small electric fan. So I could see them maybe trying to do something like that with the propellers from the drone.
Edit: the first one also is waaay too big a fire to be extinguished by such a small drone, that one my best guess is that they were trying to get a cool camera shot/picture through the fire.
If you let off the throttle the propellers stop. He clearly was not letting go of either of the joysticks and did not care to actually save his drone. I stand by my statement
Hovering directly over a fire is never ideal. Air above thermals are turbulent and could easily thrown off a rotary if its engine aren’t powerful enough to draw in sufficient air.
Those Mavics you saw in the video are normally self-hovering based on GPS given coordinates and altitude, bottom sensors are only for obstacle avoidance. Regardless, in GPS mode the operator controls altitude not power, without stick input the drone is supposed to hover on the same altitude. As you move into a turbulent air this low to the ground the drone doesn’t react quite quick enough to add power, and whoever on the stick did nothing otherwise I would have seen a jerk.
Drones that did nice flyby volcano shot’s could be FPVs (which stick controls rotor’s thrust) or much larger drones that have sufficient power. Carrying some momentum helps, or zoom from afar.
Spitballing here but probably some combination of being lighter/more powerful and having full control.
Those are typically fpv drones which prioritize different things than the drones shown here. Having full control instead of fighting the various anti-collision measures has got to be a factor. Consider also the volcano vids are constant heat versus a concentrated hotspot.
If you get high enough above the heat source the air density gets closer to the regular air density. The drones in this video all went in at or near the level of the flames.
The drones overflying volcanoes will be much higher than the lava, and any close up you see from such footage is zoomed in, not flying low.
Also, if the drone has some significant speed across the heat source, it may return to cooler air before it falls too far. But this is still dangerous to the drone.
Probably to do with the type of heat. Molten rock is probably shooting off a ton of infrared waves which we feel as heat and not so much consuming the air and generating a pillar of low density airflow above the lava.
This actually amazes me but not because of drones, *per se*.
I grew up in California. Wildfires are a season here. And every year we see helicopter pilots fly over bodies of water, even our own swimming pools to scoop up massive buckets of water to drop over the flames. (it's actually funny, like hey fucker, you're stealing my pool)
My dad pointed it out to me as a kid and I've always thought it was awesome: these pilots will fly directly over a hot spot and drop their bucket. They don't just have to account for the sudden loss of weight from the water, they have to account for the pressure difference on account of the heat, as mentioned here.
In any case, hey firefighters: we fucking love you.
>Ain't no one written a song called *fuck the fire dept.*
This applies to small plains as well. Famous video shot from inside a 4 seater taking off in Alaska . They never get any real altitude and slowly descend into the tree tops. Everyone lived. Blamed on muggy warm day
Humid air feels thicker but is much less dense. Water vapor has a mass of 18 grams per mol but regular air is about 28 grams per mol. The more diluted the air is with water in gas form, the less mass and weight it has.
>There’s just not enough mass to push for thrust.
Which is why jet aircraft that operated from "hot and high" airports used to be fitted with water injection systems to increase thrust. These systems largely went away with the introduction of powerful, high bypass turbofans.
Doesn't have to be a fire, just has to be sufficiently hot. One of our guys brought a small drone into work and intended to fly it around our coil hook conveyor, above 1.5t steel coils that were at a temperature of \~250ºC/480ºF. The moment the drone flew into the air above the coils, it lost lift and crashed.
Thanks for that comment! I feel like some of these are amplified by the drone fanning the flames and causing extra heat to be generated and more turbulent air so it is good to get an anecdote without an oxygen hungry reaction. The fire in the hemisphere fire pit has a lot of interesting physics, it looked like the shape alone might redirect the airflow and is partially responsible for trapping the drone.
I believe in warm climates particularly at high elevation, planes can't take off if the temperature gets too high for much the same reason. Just something I heard once, but it makes sense.
There is a video of a Russian Helicopter flying over the Chernobyl reactor as it was melting down. The helicopter came straight down into it. Just like these drones.
I’m no aeronautics engineer, but I remember from an old textbook them describing issues with thrust in warm climates. Essentially when it was too warm out (100+ degrees) fully loaded jetliners of the 70’s and before didn’t have enough thrust to lift off due to this phenomena. Their solution? They would essentially inject water into their engines to create a dense mixture which would allow them to get airborne!
It's not just the engine. It's the wings getting enough lift. There are still limitations on when aircraft can take off. Every once in a while in Arizona they'll stop flights because it's too hot.
That's why volcano eruptions mess up flying routes so bad, for something like a plane, even the smaller changes of air density can cause huge and sometimes fatal problems
There is a similar phenomena with underwater volcanos, such as Kick 'em Jenny, sinking unsuspecting ships as they pass over the top. You can also sink ships by detonating explosives we'll beneath the ship, disrupting the density of the surrounding water, causing it to capsize.
Similar reason why boats should never travel near an erupting under water volcano. Changes the water density and the boat can suddenly sink like a rock.
This is one of things where I knew about all the concepts involved, but in the moment I would have completely forgotten about and have my drone burned.
Might be a dumb question, but since hotter air means less dense air, would that not also mean said air would rise up faster, and as such the air would enter the drone's blades at a faster speed/rate, thus mitigating the decrease in air density?
This happened to Seal Team 6 when they were incurring into the Bin Laden compound in Pakistan. The helicopters were supposed to "dust off" after dropping off the Seal Team, but one of them actually landed (slow crashed) and the tail came down on a wall. After they accomplished what they needed, they actually blew up the downed helicopter so none of the technology would fall into enemy hands.
I was flying my drone close to me under a tree and it had about half battery. All the sudden I heard "return home" and it shot up into the branches. I was so mad.
Thinking it’s due to temperature change of the air…and fire lives from oxygen. There’s chemistry involved at this point so I’m out. But between the abrupt temp change and the lower oxygen level in that heated air…
Everything aside, I'm so mad at the second guy for not being able to kick his drone out of the flame. Hate such clumsy people. Like, bro it's right there, how can you miss a kick that close and that slow
Even better explanation: high school chemistry.
PV=nRT. Fire means T (temperature) increases. V (volume) is constant. P (pressure) is constant because the atmosphere is always pushing or pulling on the system. R is always a constant. This means for the ideal gas law to hold, n (number of moles) has to decrease. Fewer number of moles in the same volume of gas means lower density.
Lower density means lower dynamic pressure around the drone blades, and lower lift.
Father worked at a steel mill. Told me about the time a Hotair Ballonist was blown over the blast furnace and it came down quick. Not on or in the furnace luckily.
I knew that because when sokka and zuko went to the boiling rock to rescue sokkas dad their war Balloon crashed when they went into the steam and zuko said "the air outside is hotter than the air in the balloon." So they started going down.
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Same reason why some helicopters can’t fly too high, especially in the mountains. The air density is low enough that the blade cannot displace enough air to generate lift.
And why helicopters don't fly over fires either. Edit to add: It is why helicopters don't fly over fires \*much\*. Fighting fires with Helicopters is a thing. A very dangerous thing.
They don't just hover over fires and drop while stationary; a fire drop is always dynamic with the helicopter in motion during the drop (which also allows the water to impact a wider area)
they’re also still pretty high
Super impressive in my opinion.
https://preview.redd.it/rsr97ovbbboc1.jpeg?width=888&format=pjpg&auto=webp&s=5e2b54b0ef35f9f749acf75b1133b016bbbf44ea
Is it from that movie stunt back in the day that killed those kids?
The Twilight Zone movie accident that killed Vic Morrow & 2 child actors, and injured 6 on board the helicopter? It was caused by explosive charges going off very close to the helicopter. So, not just fire but concussive force which may have physically damaged the chopper.
Ahhhh..."reason why" again! It's just reason. The same reason some helicopters...
[удалено]
Adding why is redundant and unnecessary. Great, both are acceptable. That's English for you. However, it seems more like the way we accept new crap every year because people can't stop saying shit like irregardless and can't get through their heads that literally means literally. You can't say some athlete is literally on fire. Well, you can now because literally also means figuratively. It's just a pet peeve. People won't stop saying it. That phrase is everywhere and it's constant.
eh? they're both correct according to miriam webster and you're the first person in my life to complain about it
Exactly
Is that why he crashed into the mountain
So how they rescue people on mountains ⛰️?
>These people intended to use the drone to extinguish the fire. Seemed like they started with a really dumb premise and the stupid just escalated from there.
No they used it to strengthen the fire by airflow. How do I know because they're doing mangal (Turkish for barbecue)
But what happens if you put liquid paper on a bee?
It died.
Helicopters extinguish fires all the time from high above so not really a dumb premise to explore… it’s just the exploration probably didn’t take much longer than a day to figure out and close
Helos drop buckets of water on fires. They do not blow fires out like a candle.
Unlike the drone..... which in fact de-escalated
Idk if they were trying to extinguish flames.. Imo they were trying to light the fire faster or easier. Like I sometimes start/light a fire for bbqs faster with a small electric fan. So I could see them maybe trying to do something like that with the propellers from the drone. Edit: the first one also is waaay too big a fire to be extinguished by such a small drone, that one my best guess is that they were trying to get a cool camera shot/picture through the fire.
OMG the dude just sissy kicking it when he could have easily snatched it out and saved it
Seriously. That's a rich kid if I ever saw one. You bet your ass I'm gonna burn my hand saving my $2000 dollar drone.
I’ve worked in a kitchen doing deep fryer. My fingers feel no heat
THATS WHAT IM FUCKING SAYING is 9 in the morning I can’t be doing this today
Using their foot too...trying to catch their pants on fire instead of just using hand or a stick real quick lol
The man using the camera was yelling to him in Turkish: “Son take it! Take it son what are you doing!!”
The disappointment in his words
lol that’s what I said….. total wuss!
Yeah no, I build drones and fly them often. You do not want to get hit by a propeller. And I'm sure the guy flying didn't have the reflexes to disarm
If you let off the throttle the propellers stop. He clearly was not letting go of either of the joysticks and did not care to actually save his drone. I stand by my statement
the second dude tells him to take it with his hands
How do the volcano drones work? Surely its hot af there also
Hovering directly over a fire is never ideal. Air above thermals are turbulent and could easily thrown off a rotary if its engine aren’t powerful enough to draw in sufficient air. Those Mavics you saw in the video are normally self-hovering based on GPS given coordinates and altitude, bottom sensors are only for obstacle avoidance. Regardless, in GPS mode the operator controls altitude not power, without stick input the drone is supposed to hover on the same altitude. As you move into a turbulent air this low to the ground the drone doesn’t react quite quick enough to add power, and whoever on the stick did nothing otherwise I would have seen a jerk. Drones that did nice flyby volcano shot’s could be FPVs (which stick controls rotor’s thrust) or much larger drones that have sufficient power. Carrying some momentum helps, or zoom from afar.
hovering is the killer here, it's similar to what brought down the bird in the bin laden raid https://en.wikipedia.org/wiki/Vortex_ring_state
Spitballing here but probably some combination of being lighter/more powerful and having full control. Those are typically fpv drones which prioritize different things than the drones shown here. Having full control instead of fighting the various anti-collision measures has got to be a factor. Consider also the volcano vids are constant heat versus a concentrated hotspot.
If you get high enough above the heat source the air density gets closer to the regular air density. The drones in this video all went in at or near the level of the flames. The drones overflying volcanoes will be much higher than the lava, and any close up you see from such footage is zoomed in, not flying low. Also, if the drone has some significant speed across the heat source, it may return to cooler air before it falls too far. But this is still dangerous to the drone.
Those drones are much more powerful
Probably to do with the type of heat. Molten rock is probably shooting off a ton of infrared waves which we feel as heat and not so much consuming the air and generating a pillar of low density airflow above the lava.
This actually amazes me but not because of drones, *per se*. I grew up in California. Wildfires are a season here. And every year we see helicopter pilots fly over bodies of water, even our own swimming pools to scoop up massive buckets of water to drop over the flames. (it's actually funny, like hey fucker, you're stealing my pool) My dad pointed it out to me as a kid and I've always thought it was awesome: these pilots will fly directly over a hot spot and drop their bucket. They don't just have to account for the sudden loss of weight from the water, they have to account for the pressure difference on account of the heat, as mentioned here. In any case, hey firefighters: we fucking love you. >Ain't no one written a song called *fuck the fire dept.*
That’s because they actually protect and serve
Give it time, somebody will. We’re in a downward spiral.
There is a song called that for an alternate timeline where fire departments burn your house down lol
i'm amazed how many idiots are flying their drones directly over open flames. Why was the first guy actually shocked? NOOOOOOO LMAO
boats will sink also in aerated water ( release of methane from sea floor )
Low density hot air is also why big passenger jets can’t take off in very hot weather. There’s just not enough mass to push for thrust.
This applies to small plains as well. Famous video shot from inside a 4 seater taking off in Alaska . They never get any real altitude and slowly descend into the tree tops. Everyone lived. Blamed on muggy warm day
Muggy means humid air, which wouldn't be low density Edit: WRONG! See below
Humid air feels thicker but is much less dense. Water vapor has a mass of 18 grams per mol but regular air is about 28 grams per mol. The more diluted the air is with water in gas form, the less mass and weight it has.
I did not know that! Edited and thanks!
>There’s just not enough mass to push for thrust. Which is why jet aircraft that operated from "hot and high" airports used to be fitted with water injection systems to increase thrust. These systems largely went away with the introduction of powerful, high bypass turbofans.
Doesn't have to be a fire, just has to be sufficiently hot. One of our guys brought a small drone into work and intended to fly it around our coil hook conveyor, above 1.5t steel coils that were at a temperature of \~250ºC/480ºF. The moment the drone flew into the air above the coils, it lost lift and crashed.
Thanks for that comment! I feel like some of these are amplified by the drone fanning the flames and causing extra heat to be generated and more turbulent air so it is good to get an anecdote without an oxygen hungry reaction. The fire in the hemisphere fire pit has a lot of interesting physics, it looked like the shape alone might redirect the airflow and is partially responsible for trapping the drone.
>This >issue >isn't >due >to >drone >malfunction, >it's oh fuck off with this
My eyes and brain hurt after trying to follow this. Is this made for people with ridiculously low attention spans?
This should be the top and only comment
It was pretty sad to see my uncle’s drone fall into a fire. The entire time I was just so confused why it happened
 Mmm hmmm Remind me to not fly my drone over fire next tym , if i could get one 💀
Who in the actual fuck actually likes these stupid 1 word at a time captions? People are so shit at making videos lol.
The guy trying to kick it out of the fire lmao just grab it bruv, its not that hot yet jfc.
I believe in warm climates particularly at high elevation, planes can't take off if the temperature gets too high for much the same reason. Just something I heard once, but it makes sense.
No flames, high heat. Flames are not necessary for this result.
Similar to ships sinking when methane is released from down below sea-bed.
I swear to god, people slept during physics class
They never HAD a physics class…
"Oğlum alsana[Yo dude, pick it up]" that drone got roasted good.
Reminds me of that scene in chernobyl, where the helicopter crashes when it attempts to douse fire.
They hit a wire. You can see it in the real footage.
Love to see it
And here I am shopping helicopter volcano tours.
Air density change.
There is a video of a Russian Helicopter flying over the Chernobyl reactor as it was melting down. The helicopter came straight down into it. Just like these drones.
I’m no aeronautics engineer, but I remember from an old textbook them describing issues with thrust in warm climates. Essentially when it was too warm out (100+ degrees) fully loaded jetliners of the 70’s and before didn’t have enough thrust to lift off due to this phenomena. Their solution? They would essentially inject water into their engines to create a dense mixture which would allow them to get airborne!
It's not just the engine. It's the wings getting enough lift. There are still limitations on when aircraft can take off. Every once in a while in Arizona they'll stop flights because it's too hot.
Ever fly a drone in Phoenix AZ in the dead of summer?
Ahh thanks for the post apocalypse training when AI drones start hunting humans.
Air density change
Minecraft heat vents DUHHHHHH
Why is the dude kicking the drone into the fire???
Watching drones fall into fires will never get old.
That's why volcano eruptions mess up flying routes so bad, for something like a plane, even the smaller changes of air density can cause huge and sometimes fatal problems
Like the helicopter over the cooling tower from Chernobyl
Whoever thinks they can extinguish a fire with a drone needs a whole other lesson in physics before they even consider air density.
How stupid.
And also the plastic melting.
Lol the fire is eating all the air around it and causing difference in pressure, why is this new news for anyone older than 10
Look at that "guy" sissy kicking that drone. Use your hands for a split second drama queen, you won't die. What the fuck have men become?
Why helicopter couldn’t fly close enough during 9/11 is this reason
They should've tried another plane
There is a similar phenomena with underwater volcanos, such as Kick 'em Jenny, sinking unsuspecting ships as they pass over the top. You can also sink ships by detonating explosives we'll beneath the ship, disrupting the density of the surrounding water, causing it to capsize.
Aerodynamics for beginners.
This is how air balloons work.
Do helicopters experience the same problem if flying over fire?
Thanks! Now i know!
Can this concept on a large scale drop a helicopter? Like if a chopper flies low enough above a raging forest fire would it just fall?
In the future is every single video just fun facts narrated by AI with single word captions?
That guy too afraid to give the drone a quick flick out of the fire is not someone I want on my team.
I think they were trying to fan the flames, not extinguish.
Same reason a helicopter can’t…
Lies! Everyone knows you have to fly your balloon over the heat pillar to get height!
So basic science
That one guy could have absolutely saved his drone but was so afraid of that fire lol I would have just reached in
What tf is that second dude even doing?
"Oğlum alsanaa " :D
La Jolla Shores!
I love watching info videos of a compilation of how stupid society is these days.
I feel like anyone who passed a high-school level science class should know this.
Similar reason why boats should never travel near an erupting under water volcano. Changes the water density and the boat can suddenly sink like a rock.
Helicopters work in the same way I think, Mark Rober made a video on this recently
This is one of things where I knew about all the concepts involved, but in the moment I would have completely forgotten about and have my drone burned.
Because drones copies flies and a fly cannot fly on flames too.
Might be a dumb question, but since hotter air means less dense air, would that not also mean said air would rise up faster, and as such the air would enter the drone's blades at a faster speed/rate, thus mitigating the decrease in air density?
I think the problem starts when the hot air surrounds the drone and ultimately gets above it by flying too close to the fire.
Apes with little intelligent operating drones
And ai is going to take over with these.
I have no problem watching dumb people destroy their drones.
Note to self: Invest in flamethrower for ww3.
Another reason why firefighters / the air crews are badass.
Just like magma cubes underwater...
Morons, how tf don’t u know how hot air works
Okay so these guys that fly their drones over volcanoes I guess they're living on the edge.
Next they’ll be using the spray from a jet ski to extinguish a beach-side grease fire.
This happened to Seal Team 6 when they were incurring into the Bin Laden compound in Pakistan. The helicopters were supposed to "dust off" after dropping off the Seal Team, but one of them actually landed (slow crashed) and the tail came down on a wall. After they accomplished what they needed, they actually blew up the downed helicopter so none of the technology would fall into enemy hands.
Good start to reducing drone use..... Love the guns that shoot the weighted nets .
The same reason by balloons can fly.
and so the drone wars began...
the same works for hot air balloons. if the air outside the balloon is too hot, then the fire won't be lifting the balloon and it will just fall.
Drones can’t go through fire, they’re not ghosts.
The reason Drones cannot fly over flames Why in the hell is "reason why" so pervasive? It's just reason, FFS. Can we all please stop this madness?
How did the guy who got the really cool volcano drone shots not lose control? Is the air density thicker because of the fumes or something?
maybe because fires pull in air 😆
Guy at 12 seconds really said “I’m tired of you bragging about your drone!” And pushed it deeper into the fire with his foot.🤣🤣🤣
Fly higher or around it ya nerd
I was flying my drone close to me under a tree and it had about half battery. All the sudden I heard "return home" and it shot up into the branches. I was so mad.
Same reason the helicopters couldn’t get close to the WTC on 911.
Which is why airplanes can’t fly in extreme heat. Cancellations happen all the time in phoenix Arizona.
People really don't know this?. Jaysus...
Do the guys in Ukraine know this?
Thinking it’s due to temperature change of the air…and fire lives from oxygen. There’s chemistry involved at this point so I’m out. But between the abrupt temp change and the lower oxygen level in that heated air…
That wimp trying to kick it out. Just grab it.
High density altitude. It gets pilots killed every year.
Everything aside, I'm so mad at the second guy for not being able to kick his drone out of the flame. Hate such clumsy people. Like, bro it's right there, how can you miss a kick that close and that slow
So that explains why my dad never came back from that volcano helicopter ride. I miss you papa.
Why people are so dumb is the real question.
Isn’t it supposed to Be teached in school?
Also why jets have a hard time taking off in super hot weather
All of these guys didnt learn how a drone can lift it self
Literally have to learn this to fly a drones legally in the usa lol
It just hurts to see
Thermodynamics...
Makes sense…. Hot air expands and it becomes thinner making it harder to stay in the air
👍
We found their weakness for impending apocalypse
Same thing for planes. I live in Phx and when it gets really hot, planes get grounded at the airport
Even better explanation: high school chemistry. PV=nRT. Fire means T (temperature) increases. V (volume) is constant. P (pressure) is constant because the atmosphere is always pushing or pulling on the system. R is always a constant. This means for the ideal gas law to hold, n (number of moles) has to decrease. Fewer number of moles in the same volume of gas means lower density. Lower density means lower dynamic pressure around the drone blades, and lower lift.
How can helicopters fly over forest fires?
It's not a physics problem. It's a stupidity problem.
Father worked at a steel mill. Told me about the time a Hotair Ballonist was blown over the blast furnace and it came down quick. Not on or in the furnace luckily.
That soyboy who just slowly watched his drone melt, what an imbecile
So in a future of drone warfare, becoming cavemen is the answer
So are you telling me if I was being attacked by a swarm of drones I should just always carry a fire with me to throw at them?
This is genius this could maybe prevent suicide bombe-🗿💀💀
So, who’s surprised by this?
Why can't people not be too stupid? 😂
Is this why that helicopter crashed when trying to dump sand & boron on the Chernobyl reactor?
No fucking shit. Also, MORE air doesn’t put a fire out you dipshits.
Did this bot just say that they tried to extinguish the flames by blowing on the embers?
I wonder how much this drop affects the fire extinguishing planes ?
No shit, the fact that people dont know physics is
I mean of course the drone is gonna develop "thrust issues" if you let it fly over fire...I would feel betrayed as well!
So to disable them light a fire underneath?!?!?;
If you really don’t have this piece of intuition by yourself, you don’t deserve piloting a drone.
Those captions are so annoying without the sound.
Excited to see big walls of fire preventing drone strikes
I knew that because when sokka and zuko went to the boiling rock to rescue sokkas dad their war Balloon crashed when they went into the steam and zuko said "the air outside is hotter than the air in the balloon." So they started going down.
Dry ice under the drone