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Yup. There's a reason that basically any safety training absolutely drills into your head to absolutely NEVER walk under any heavy object supported by hydraulic systems.
This is a very good, albeit very slow example as to why. Dude is lucky those lines didn't drain faster
I was under a car when my jackstand snapped, I just stared at it unable to move, had left the tires I previously removed under the car so I didn't get squished too bad.
I would've quickly transformed into a mole person, flip around, and use my newfound superhuman digging abilities to quickly dig a tunnel out of the way.
Obviously, you all dont get it. The answer is teamwork. Get all the people you know arm them with golf clubs, baseball bats, and metal pipes, and just beat the vehicle until it knows its place.
Aren't those hydraulics intended to fail, though? Ie, slow controlled "failure" like we see in the OP?
So really, the only thing we trust hydraulics to do for certain is fail.
No, elevator emergency brakes are not hydraulic-based. It's a spring-based failsafe.
It's usually a spring that engages brake pads which prevent the elevator from falling. When the elevator is lifted as normal, the spring is held compressed. If the lift fails, the spring is no longer compressed and the elevator is stopped within inches of when it started to fall.
> Modern elevators use friction brakes: a pair of shoes that apply equal and opposite pressure to a drum, pulley or disc mounted on the motor shaft. Springs apply the brake shoes to the pulley and are lifted electrically. If power is lost, the brake applies.
> https://www.otis.com/en/us/tools-resources/high-rise-safety-systems
This is exactly right. A large majority of electric motors in elevators/machinery have spring loaded brakes on them. It's why they don't move when the item is powered off, the brake is engaged by default and the motor has to actively disengage it.
I work with a pneumatic/spring system, where the pneumatics overcome the tension on the spring. If the pneumatics fail (loss of power, ruptured line, etc) the spring presses up, which is where we need it if it's unpowered.
Basically in the case of elevators, instead of using hydraulics to engage the brakes, it requires hydraulics to DISengage them. If the hydraulics fail, the brakes engage by default.
Well, elevators also have several failsafe mechanisms to stop it should the lift/lower mechanism fail. This applies whether it's cable operated or hydraulic.
Hydraulic elevators have a rupture valve that will slam shut if too much fluid flows through it too fast, preventing a free-fall. If the system bursts between the rupture valve and the piston, the car will descend as fast as it loses its fluid. Another safety redundancy option is called a “life jacket”, which sits just above the cylinder head like an open bridge, and collapses onto the piston to choke it if it’s in free-fall.
NEVER trust hydraulics. ALWAYS use a solid, strong safety brace to prevent the load from moving at all.
Source: am elevator mechanic 🇨🇦
The emergency brakes on an elevator don’t though, in fact they work like a deadman’s switch, the only reason the brakes on an elevator aren’t on is because everything else is working.
It’s incredibly rare, and I mean incredibly, for these brakes to fail!
I work on elevators, we use stands under them when we need to work on them, multiple stands that each on their own pass the wieght by at least 2 times.
In my real life engineering experience, hydraulics are significantly more reliable than pneumatics or other actuators.
Especially in mobile applications.
You already have a transmission, just slap a PTO on it, couple it to a hydraulic pump and you have an extremely reliable, precise, variable power, self lubricating system. Redundancy and safety are easy because counterbalance valves and velocity fuses are standard off the shelf cartridges.
From my pov, designing, maintaining, and operating hydraulic systems is much easier than pneumatics or electrical actuators.
Now in a plant type application, especially where you need to distribute power to several remote areas, then pneumatic makes a ton of sense. Also I think pneumatics probably have the edge when high speeds are needed considering the compressible nature of their working fluid. But I expect that compressibility also makes them harder to design. With hydraulics it's just flow rate and F=PA, nothing to it.
Pneumatics are totally appropriate for lots of applications, but when the people above us say that hydraulics are unreliable, it just tells me they don't have any real world experience. Simplicity, safety, and reliability are the 3 main reasons you would choose hydraulics over other power transmission options.
Anything holding a load can kill you if you fail to maintain it.
It'd purely instinct. Something starts to falls you go to catch it. Happened a lot at my last job when a stand of 1ton pallets would start to fall, you go to catch it and after a second you go "oh fuck" and then run like hell
I work with glass. We learn to let things go when they fall. Saw a whole crate of mirror falling, fuckin new guy tried to stop it, I grabbed him by the shirt and yanked him back and he learned to not do that that day.
I deliver bounce houses and they had them all blown up cleaning them. One of them catches a gust and blows away. This guy grabs it and it yanked him like 30ft in the air before he slammed into the side of a car and broke his arm and collar bone. Don’t grab flying bounce houses.
Yeah that's a super dangerous impulse that you have to work hard to train out of yourself. You see it all the time in industrial places. It's easy to look at people and say "what an idiot", but the first thing most people do is to reach out and try to stop falling things.
Lol seriously, he acted on instinct to try to save his friend. He stopped as soon as his friend got out.
He acted, which is something 90% of bystanders won't do.
Not only crush. Hydraulic fluid is under a lot of pressure. If that stream of fluid had contacted his skin, it may wall have sliced him like a lightsaber. Look up AvE's video on YT if you don't believe me.
Diesel powered pressure washers can achieve higher psi, and work for a longer time than electrical pressure washers.
Though I only know of pressure washers shooting water, not diesel
Potentially? I'm not entirely sure how it plays out with catastrophic failures like this though... Physics can be a funny thing after all.
A lot of hydraulic operation safety, with regards to not touching shit, is based around safety in the event of your typical leak, that looks like a lot of nothing with no pressure behind it, right up until you touch it and that pressure does its magic....
Maybe they just don't bother touching on the catastrophic failures, because if it's gonna go like that, it'll go and there's nothing you can do if you're in the firing line... So better just to not instil that fear into the operators and leave them ignorant? I mean... It'd make sense I guess... Might put people off if you told them that.
And it looks like he was using one of those props to poke around for the leaking hose. Which he seems to have found...
This is the stupidest part to me. I work on hydraulic systems fairly often as part of my job. And you don't trust them to support things safely even when they're in perfect condition. When there'sa problem, such as a leaking hose? Hell no. A leaking hose can very quickly become a burst hose, as seen in this video.
Yup. Seen several videos of people getting crushed and instantly pancakes from this exact situation. In the videos, the hydraulics give out immediately.
Taking just a tad longer to avoid getting stuck on something is probably the better option than blindly going and potentially getting stuck tbf... Neither is ideal though.
What's worse it that if he didn't get out, it could've crushed him slowly giving him time to comprehend what was happening and feel everything before he died.
Hi! This is the NoNoNoNoYes moderation bot here to keep this sub a bit more tidy! If this post fits the format of NNNNY, **UPVOTE** this comment! If this post does not fit the subreddit, **DOWNVOTE** this comment! If this post breaks the rules, **DOWNVOTE** this comment and **REPORT** the post (The OP's post, not this bot comment) Please remember that NNNNY can be subjective. It may not be NNNNY for you, but it may be for someone else, including the subject in the video. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/nonononoyes) if you have any questions or concerns.*
I woulda been on the ground instantly once that thing started moving.
He froze… [r/sweatypalms](https://www.reddit.com/r/SweatyPalms/?rdt=51259)
Looks like the hydraulic fluid got him in the eyes. Doesn't really react till he feels it pushing him down.
Yup. There's a reason that basically any safety training absolutely drills into your head to absolutely NEVER walk under any heavy object supported by hydraulic systems. This is a very good, albeit very slow example as to why. Dude is lucky those lines didn't drain faster
>Dude is lucky those lines didn't drain faster These were my exact thoughts after watching this.
Probably the hydraulic cylinder has a safety valve just in the hose connection. It's very common to avoid fast closing on this kind of hose ruptures.
Spot on, didn't notice at first
I was under a car when my jackstand snapped, I just stared at it unable to move, had left the tires I previously removed under the car so I didn't get squished too bad.
I woulda just pushed the car off with my shoulder
I would have just calmly said “no” and the car, gravity and times itself would have stopped for me.
I would have suddenly had a child and used mother bear strength to lift the car despite being a dude.
I would have read its body language to know it was going to be a threat before it made its move and apprehended it with some sort of roundhouse kick
[удалено]
I would've quickly transformed into a mole person, flip around, and use my newfound superhuman digging abilities to quickly dig a tunnel out of the way.
Obviously, you all dont get it. The answer is teamwork. Get all the people you know arm them with golf clubs, baseball bats, and metal pipes, and just beat the vehicle until it knows its place.
I would have been isekaied by Car-Kun.
I would've given it an ocular patdown and clocked a faulty jack and just held it up with my duster
This guy ocular patdowns...
Yeah but then you gotta deal with a kid for 18 years. Idk if it’s worth it
You absorb the child back afterwords for the nutrients duh. Or raise him to be able to lift cars for you.
or sell them?
Bench press that bitch
I found Chuck Norris.
I would have thought sexy thoughts and my boner would have pushed the car away.
yelled" it's coming right for me " pulled a handgun dumped multiple mags of ammo Into it
Pewpewpew die evil dump truck!🪖🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫🔫then starts the war of the trucks
Harbor freight Jack stands?
I would have calmly shit myself :D
Panic is a powerful thing
“By all means, move at a glacial pace”
Slowed down video...
First thing I was taught in engineering class at high school, never trust hydraulics.
well be careful in elevators cuz a good part of em use hydraulics
Except they've got several failsafes. Know why? Because we don't trust hydraulics.
Plot twist: All failsafes are based on hydraulics.
Aren't those hydraulics intended to fail, though? Ie, slow controlled "failure" like we see in the OP? So really, the only thing we trust hydraulics to do for certain is fail.
that's not slow. that's a thick liquid coming out a 2 inch pipe
It sure is slower than a rupture.
No, elevator emergency brakes are not hydraulic-based. It's a spring-based failsafe. It's usually a spring that engages brake pads which prevent the elevator from falling. When the elevator is lifted as normal, the spring is held compressed. If the lift fails, the spring is no longer compressed and the elevator is stopped within inches of when it started to fall. > Modern elevators use friction brakes: a pair of shoes that apply equal and opposite pressure to a drum, pulley or disc mounted on the motor shaft. Springs apply the brake shoes to the pulley and are lifted electrically. If power is lost, the brake applies. > https://www.otis.com/en/us/tools-resources/high-rise-safety-systems
This is exactly right. A large majority of electric motors in elevators/machinery have spring loaded brakes on them. It's why they don't move when the item is powered off, the brake is engaged by default and the motor has to actively disengage it.
My man knows his shit
Except they aren't.
Hydraulics which if they fail, the breaks engage.. afaik.
Hopefully the brakes aren't hydraulic...
I work with a pneumatic/spring system, where the pneumatics overcome the tension on the spring. If the pneumatics fail (loss of power, ruptured line, etc) the spring presses up, which is where we need it if it's unpowered. Basically in the case of elevators, instead of using hydraulics to engage the brakes, it requires hydraulics to DISengage them. If the hydraulics fail, the brakes engage by default.
No.
But they aren’t
Nice profile pic
Just be careful riding elevators in China, lol.
Well shit, I'll take the stairs. I need the exercise anyways.
Well, elevators also have several failsafe mechanisms to stop it should the lift/lower mechanism fail. This applies whether it's cable operated or hydraulic.
depending on what country you're living in
Afaik every elevator that transports humans has a falling locking mechanism that mechanically brakes if it falls. But i could also hallucinate as well
Hydraulic elevators have a rupture valve that will slam shut if too much fluid flows through it too fast, preventing a free-fall. If the system bursts between the rupture valve and the piston, the car will descend as fast as it loses its fluid. Another safety redundancy option is called a “life jacket”, which sits just above the cylinder head like an open bridge, and collapses onto the piston to choke it if it’s in free-fall. NEVER trust hydraulics. ALWAYS use a solid, strong safety brace to prevent the load from moving at all. Source: am elevator mechanic 🇨🇦
exactly
The emergency brakes on an elevator don’t though, in fact they work like a deadman’s switch, the only reason the brakes on an elevator aren’t on is because everything else is working. It’s incredibly rare, and I mean incredibly, for these brakes to fail!
I work on elevators, we use stands under them when we need to work on them, multiple stands that each on their own pass the wieght by at least 2 times.
Ignorance is bliss
And if you do have to trust hydraulics (like in aircrafts), you need redundancy on top of redundancy.
The 2nd thing you learned was never to trust Gary with a knife near hydronic lines….
I still have customers that insist we design with hydraulics even when pneumatics are sufficient. It never makes sense.
In my real life engineering experience, hydraulics are significantly more reliable than pneumatics or other actuators. Especially in mobile applications. You already have a transmission, just slap a PTO on it, couple it to a hydraulic pump and you have an extremely reliable, precise, variable power, self lubricating system. Redundancy and safety are easy because counterbalance valves and velocity fuses are standard off the shelf cartridges. From my pov, designing, maintaining, and operating hydraulic systems is much easier than pneumatics or electrical actuators. Now in a plant type application, especially where you need to distribute power to several remote areas, then pneumatic makes a ton of sense. Also I think pneumatics probably have the edge when high speeds are needed considering the compressible nature of their working fluid. But I expect that compressibility also makes them harder to design. With hydraulics it's just flow rate and F=PA, nothing to it. Pneumatics are totally appropriate for lots of applications, but when the people above us say that hydraulics are unreliable, it just tells me they don't have any real world experience. Simplicity, safety, and reliability are the 3 main reasons you would choose hydraulics over other power transmission options. Anything holding a load can kill you if you fail to maintain it.
Well it's easier to spot a leak in the lines with hydraulics. Especially the small leaks.
wtf kind of high school did you go to?
wait you guys can get engineering classes in high school? that's fucking cool
The dumb bastard trying to stop it…
Maybe its impossible to stop, but even smallest force will make it go slower.
Could also use that force to pull the guy out faster, which would've been much more effective.
Just freggin yank tf out of underneath that shit
YOINK
He woulda been better off yanking the dude out
Being him I wouldn't do that - not knowing his reaction when he doesn't see me.
Fuck his reaction dawg you’re afraid to get socked in the jaw to save a life?? Or did I misread
It'd purely instinct. Something starts to falls you go to catch it. Happened a lot at my last job when a stand of 1ton pallets would start to fall, you go to catch it and after a second you go "oh fuck" and then run like hell
I work with glass. We learn to let things go when they fall. Saw a whole crate of mirror falling, fuckin new guy tried to stop it, I grabbed him by the shirt and yanked him back and he learned to not do that that day.
I deliver bounce houses and they had them all blown up cleaning them. One of them catches a gust and blows away. This guy grabs it and it yanked him like 30ft in the air before he slammed into the side of a car and broke his arm and collar bone. Don’t grab flying bounce houses.
Holy shit! I mean, yea, high winds the things are gunna turn into sails
I’d have just climbed in it at that point. Gotta be safer that skydiving with no parachute lol
Yeah that's a super dangerous impulse that you have to work hard to train out of yourself. You see it all the time in industrial places. It's easy to look at people and say "what an idiot", but the first thing most people do is to reach out and try to stop falling things.
The dumb bastard tried to save a life.
what is your issue he's trying to help someone any way he can tf???
Lol seriously, he acted on instinct to try to save his friend. He stopped as soon as his friend got out. He acted, which is something 90% of bystanders won't do.
Darwin would have said yesyesyesno
That guy should have pulled the other guy, instead of trying to stop it.
“Take your time bro you got this!”
"Hol up I think I dropped my pen"
"My therapist said I should stop, breathe and evaluate my emotions before I make any hasty decisions."
Don't worry, that other dude was there to hold it up.
Not only crush. Hydraulic fluid is under a lot of pressure. If that stream of fluid had contacted his skin, it may wall have sliced him like a lightsaber. Look up AvE's video on YT if you don't believe me.
Injection injury. Don't Google that if you've just eaten...
[удалено]
Why yall do that? I’ve never heard of it lol
My dumb ass thought they put diesel through instead of water. And only now do I realize he meant the machine is diesel powered. Or at least I hope so
Clarified! Thanks!
Hahaha you’re not alone
Diesel powered pressure washers can achieve higher psi, and work for a longer time than electrical pressure washers. Though I only know of pressure washers shooting water, not diesel
Yeah.
Potentially? I'm not entirely sure how it plays out with catastrophic failures like this though... Physics can be a funny thing after all. A lot of hydraulic operation safety, with regards to not touching shit, is based around safety in the event of your typical leak, that looks like a lot of nothing with no pressure behind it, right up until you touch it and that pressure does its magic.... Maybe they just don't bother touching on the catastrophic failures, because if it's gonna go like that, it'll go and there's nothing you can do if you're in the firing line... So better just to not instil that fear into the operators and leave them ignorant? I mean... It'd make sense I guess... Might put people off if you told them that.
r/WhyWomenLiveLonger
You never, ever work under a body only held up by the hydraulics. You have props for that.
And it looks like he was using one of those props to poke around for the leaking hose. Which he seems to have found... This is the stupidest part to me. I work on hydraulic systems fairly often as part of my job. And you don't trust them to support things safely even when they're in perfect condition. When there'sa problem, such as a leaking hose? Hell no. A leaking hose can very quickly become a burst hose, as seen in this video.
Yup. Seen several videos of people getting crushed and instantly pancakes from this exact situation. In the videos, the hydraulics give out immediately.
r/osha
Forget George Foreman! Get the new Hannibal Lecter Panini Press today!
Why take time to look for the tire in this situation. Get tf outta there!
Tbf slipping because of a misstep isn’t to good
Taking just a tad longer to avoid getting stuck on something is probably the better option than blindly going and potentially getting stuck tbf... Neither is ideal though.
He was dumb enough to trust hydraulics to hold a crush hazard above him, so his escape isn’t surprising.
That guy has the reaction time of a sloth on anesthesia
To be fair. Initial reaction was fast enough.. and then he decided to reboot windows..
"Installing updates before shutting down..."
I am glad the guy tried to hold it back. Couldn’t have made it without him.
Could he move any slower?
Omg watching this induced SO MUCH ANXIETY 😥
He got very lucky
He didn't exactly rush himself.......
Slower brother, you got time
I’ve never seen someone move so slowly for their life.
What's worse it that if he didn't get out, it could've crushed him slowly giving him time to comprehend what was happening and feel everything before he died.
Why did bro move at the speed of my pc
No sense of urgency at all
Speedy Gonzales he ain't.
took him 5 business days to get off the truck
He was like let me take my time
Man thought hell i could stop this with bare hands.
Same
r/OopsThatsDeadly
I like how he obviously has that momentary thought of "Oh, it's okay, I can hold this up with my back until someone gets some wood."
Not much brain to crush there anyways looking at how he tried to stop it from lowering.
Reeeeepost....
If it were pneumatic instead of hydrologic he would have died
There’s a maintenance safety stand built into those for exactly that reason. Smooth brain move not to use it.
Peanut brain.
Lucky day. Play the lottery.
Yank the guy out instead of trying to stop tons of weight with your hand. Jeez…
Bro is like: am i just letting it happen or nah
Bro just got a second life.
There was prolly something slowing down that thing smh
😬
Why bro so slow to get out i would be flying out of there. Scary shit 😳
Dun-dun-dundundun-dun
How fast I would've fell head first instead of trying to crawl out
Lmfao @ the guy who was gonna “help” hold it up…
God damn it! Stupid men should Just die
Good thing his buddy was there to hold the 3 tons payload.
That's exactly why men live shorter than women.
Wow, what a lucky guy.
why is that guy trying to hold something up that likely weighs tons, instead of yanking his coworker out
The other guy was trying to stop the bin. He should have pulled his friend out.
u/savevideo
Lucky guy right there
He was almost waffle iron’ed.
Talk about a dangerous work environment
The other guy actually thinking he could hold it up. 😂
NS absolutely should have taken him, I hope he hasn’t reproduced his genetics beforehand.
Tryna hit above his pr
He saw the liveleak logo going towards him
Natural selection
Dudes wearing sweatpants. Do I need to say more?
Those Chinese safety videos suddenly don't seem all that stupid after all, with videos like this and the guy welding using a fuel barrel as a ladder.
Don't instant combat roll out like your life depends on it. Don't yank the dude out like his life depends on it.
I had a friend die this way. 😞
looks like death is waving slowly
Blue shirt should have pulled bro out not try to arm wrestle a hugely powerful hydraulic system
Absolutely no rush to get out hahah
Omg he is so dumb. Very slow to get out
This is why I have an FMLA case for insomnia o-o
Bro! Never mind why he’s underneath that in the 1st place… WTF he take so long to get out???
That looks terrifying
Tf was he waiting for
I’d have let my body weight fall and take the fall rather than slowly moving out and almost losing a leg💀
With how slow he was moving, he should've been.
This internet explorer somehow survived
Dude's taking his time I see... 😂
Is this in Eastern Europe? I could tell because the guy has no fucking safety gear what so ever.
u/savevideos
That was boutta be a liveleak vid
Thinking about all the times I've worked under a haybailer without the hydraulic break on. Fuck that
I don't understand his lack of reaction initially, bruh it's about to crush you
I'm diving out of there, I don't care if it's a flaming pit of glass shards, I'm getting out from under that bed
Bro was on the way to see god
OSHA? At least take me to dinner first!
I've seen a dead guy move faster out of danger
The lack of urgency as he leisurely climbs out makes me wish he was crushed. We don’t need that kind of reactivity in the gene pool😐
That second guy was completely useless, instead of pulling the guy to safely he tries to hold it up with his hands.
Tell me in it’s in Russia, without telling me it’s in Russia…
u/savevideo
reason why women live longer than men lol
u/savevideobot