Cliffhanger Bridge Test - Mythbusters - S07 EP28 - Science Documentary
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- เผยแพร่เมื่อ 28 มิ.ย. 2024
- Adam and Jamie test the myth from the movie "Cliffhanger" where a character leaps from a collapsing bridge. Through scale experiments, they investigate the feasibility of making such a jump. Meanwhile, Carrie, Grant, and Tori examine an old fisherman's tale about hailstorms sinking boats. Despite various attempts, they struggle to determine if hailstones could puncture a boat's hull.
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They kept hitting the ribs on the wood boat... that was the most obvious thing, another is the sheer volume of hundreds of baseball sized chunks of ice falling, even at just terminal velocity, is a whole different beast than 1 piece
I was baffled by that. They determined where the wood was weakest (rot), and hit it at its _strongest_ point. Plus the fact there would be dozens of strikes in hailstorm.
What were they thinking?
@@-danR try thousands of impacts. Biggest I've seen are golf ball sized though and we're well known for big hail. I think this guy is hamming it up with his baseball sized ones.
Missed opportunity to name the hail boat “Mary”.
Hail Mary, full of ice
That yoyo they used is essentially a giant seatbealt mechanism.
The explosion does have an impact. However the rails on the side of the bridge fall alongside the bridge, and in the scene they are still up when he jumps
In a hail storm the water would be getting battered by hail too and there would be wind and waves, not calm like a mill pond so there are far more factors to the 'myth' than they tested.
Not to mention along with the hail the rain would be filling up the boat as well .
It bothered me that they didn't consider it was multiple repeated hits from the hail that did the damage. One ball may not do it but dozens of hits will stack up eventually
Absolutely ! A hail storm can last for minutes, even longer, with a constant battering of blocks of ice. You would need an ice machine gun to test that.
Okay, back to the shop then !
@@kylebolton6007 You should watch the show to the end. They ended up testing on water and got a plausible result with the wood boat.
@@Damia_C I wanna see an ice machine gun test now!
If hail is big enoygh, and traveling fast enough to puncture the hull of a boat, then you're not going to have to worry about the boat sinking because you'll already be dead 😂
I was heavily concussed by it once. Forced to walk into work under it as a 16 year old. They then inquired why I was not 15 minutes early while bleeding from my fucking ears.
The carbon footprint of Mythbusters must have been gigantic. But totally worth it.
In the grand scheme of things. Comparing it to industry, the carbon footprint would have been so small I doubt you could measure it.
This would be a great myth for the mythbusters to test
Drops in the bucket compared to China or India.
Carbon footprint? Settle down Klaus.
Of course the wooden boat was the one that had a hole punched in from the hail. The myth’s supposed to be an old one, meaning likely originating before any modern boat-building materials like fibreglass. And let’s not forget, there’s dozens if not hundreds of hailstones falling during hailstorms, not just one. You hit that boat with enough hail stones that size, sooner or later you’ll punch a couple holes in it.
42:26 - " fire more! "
exactlymy my friend
Plus, they fired baseball sized balls, yes, but their result, the thing that ultimately hits the boat(s) wasn't one massive ice-baseball, but the rather sad rest of it. But baseball sized ice hail is what we see hit the ground in the videos (and what I've seen irl a few times). So you'd have to start with even more mass to reproduce a single hail ball.
Then of course repeated hits. Then the whole 'minor detail' they just did at the very end of the episode - having the boats on water, thus having resistance behind the ground. Then added stress through waves and wetness, the boat moving up as well .. so many factors they simply ignored.
Love the Busters and the build team, but this was one of the worst (and laziest) set ups they've pulled. Really felt like someone said halfway through "this is stupid, why bother?" and called it a day.
42:26 - " fire more! "
exactly!!
when it hails only one piece of ice will fall apparently🤣
The longer the bridge the better. Any change in force acting on an object will travel through that object at the speed of sound in that material. In this case that "object" would be the ropes of the bridge, and the change in force is the sudden loss of tension on the far side of the bridge. In theory if you had a bridge that were miles long you could have some useable time before that change in tension would travel all the way to the other side of the bridge.
You'd have more usable time, sure, but the speed of sound in air is slower than in a solid. So the bridge would collapse before you heard it.
The pressure hose is pulling him away from it like a bungie cord @5:50. The whole thing is he supposed to be falling with the bridge. the bridge would catch all of the wind so you would fall with the bridge
Dude it was a freaking 10 inch Lego bridge...relax.
The way they made the hailstones isn’t the same as how they are made in nature. In nature the hailstones freeze in layers, which makes the ice much harder than a normally frozen ball, in reality it would cause more damage than what their tests showed.
But the hailstones won't be traveling 300 mph.
On the other hand, a constant barrage of hailstones could possibly cause enough wear and tear to eventually sink any one of these boats. I don't see how one would go about testing that, though.
@@jumpman8282 This has been tested before (and on tv) - by someone who actually researched how to make hailstones. Laminar ice (ice in layers) as it's created in a hailstone is multiple times harder than normal ice and can punch through thick pieces of wood that normal ice can barely dent - at the same speed.
I totally, 100% agree- but actually, to show the repeated barrage of Hailstones, would be quite simple. Just fire at exactly the same spot, with exactly Identical Hailstones, repeatedly. Nature's chances would have the damaged spot on the boat hit countless times! @@jumpman8282
who? you maybe right but please provide evidence of the show @@13minutestomidnight
@@13minutestomidnight exactly, I know precisely which show you’re talking about
Just imagine how boring a movie would be, if they used realistic physics :-D It would be fun to watch, just one time *LOL*
The problem is the speed of sound. While the explosion sound travels at the speed of sound in air, the tension dissipates at the speed of sound in the solid rope. This means the explosion sound comes after the bridge collapses.
I don't think the hail hitting a hole in the boat is busted. They only shot 1 hail stone at the boat, at different speeds. In a hailstorm, there are possibly hundreds of hail stones pelting the boat at more or less the same time. Thus weakening the structure of the boat. eventually, something is going to give. The wooden boat would be the first to go, the others are made of stronger material, so would last longer. The steel boat would probably be the only one to survive though. We have a fair amount of hail storms in South Africa, so we know that it can cause a lot of damage.
That is exactly what always bugged me as well. Not to mention hail is not always the same size, shape and density like in those tests. And the amount is also important. Absolutely agree with your take on this!
i totally agree
I thought the same. There should have been like 15000 smashed on the boat within seconds
The wooden boat is hit on the middle reinforcement. If the hail hit in between reinforcement it might well have gone through.
The also ignored that the boats deliberately have floatation chambers, possibly foam filled, in that ice dump.
Please keep these new episodes coming. I listen to them every night to get to sleep. Tq.
New episodes? The show ended in 2015.
@@XtreeM_FaiL Newly uploaded shows. It ain't that hard to understand.
They should've added a weight on to the back of the boat to simulate an engine.
My city tends to get 1 severe hailstorm most years . The last one did over $1 billion dollars damage . I've seen how severe these storms can get .
Did it damage or sink any boats?
An interesting observation though. They say that once the cables are cut the bridge and the passenger is going down but Adam actually managed to grab a hold of the rope on the bridge but he let go just as quickly as he doesn't need to hold onto it. But given the fact that he manged to grab onto the rope so quickly shows that you could survive by grabbing the rope and climbing up the bridge. It wouldn't be easy but still doable. The myth about being able to jump and all that is still busted but just because the suspensions of the bridge are cut doesn't mean you're dead.
A lot of comments here already mentioned it.. but the hail tests are failure in general..
1 shot with different speed.. vs "real hail" with dozens to hundreds of balls.. hammering down the connections and disturbing stability..
Each "Damaging hit" they mentioned would be possible hole after few more hits or hits around..
Couldn't they have found an even more rotten boat?
Also, there's a hole in the theory that the hail impact would be stronger with the boat sitting in the water. If anything, the water underneath should provide support upwards against the impacting hail ball.
I think their hypothesis was that the water would prevent the hull from flexing, thus concentrating the shock onto a smaller area.
@@jumpman8282Yeah, but I'm not sure if that would be the case, though.
@@Verschlimmbesserung It would be. Because the water supporting the boat wouldn't allow the boat to flex. Flexing absorbs some of the force.
41:19 random plane passing by xD
A lot of those bridges have gaps in between the boards so he could have actually climbed out
Messed up with the bridge, their bridge is rigged to drop instantly whereas in the film it doesn't and he jumped before the bridge starts falling.
Because movies are real
All hail are ice, but not all ice is hail.
p.s. Nice teeth Grant. :)
Firing hail was just as wrong as it could ever be, because it doesn't rain just one hailball at a time. They should've fired at least hundred hailballs in series to get more realistic result.
The current size record for a hailstone is 6", and I'm guessing probably 200mph velocity in an intense storm capable of producing such monsters. I'm pretty sure my boat would sink, but I wouldn't care 'cos I'd be dead!
Interesting thought on the bridge...
The bridge starts to fall immediately because the information about the wires being cut it passed almost instantaneously from one end to the other. That transfer of information happens at the speed of light. If the bridge were longer.... say the distance from earth to the moon, if one end was cut, the other end wouldn't start falling until 1.3 seconds later. Nothing can move faster than light - including the transfer of information.
Is it the speed of light though? Like the bridge has mass so I assume inertia and everything plays a part here.
Like it can't go faster than the speed of light and while it may look instant, there's a big difference between "instant" and absolute speed of light.
I mean I've heard about this theoretical stick to the moon before but there they would push it to send information. In theory this would happen at the speed of light but in practice you're limited by the rigidity and mass of your stick and everything.
Think falling would be no different.
@@zwenkwiel816 That's what makes it counterintuitive. You'd THINK it would just start falling straight away, but the fact is it can't. It is so far away the fact it has been cut cannot by any method be transmitted to the other and of the bridge paster than the speed of light. Even though it is the same structure.
Think of it this way... how would you know if the sun exploded 8 minutes ago? You wouldn't...
You'd be fine one moment, and dead the next. There is no way for the information that the centre of the solar system had gone. Planets would continue orbiting that point until the light of the explosion got to them.
There are much better explanations of this out there somewhere I'm sure. Check out PBS spacetime for some mind bending physics stuff.
Fire more than one “hailstone” and maybe a more plausible outcome. Hail rarely falls solo
Try never
While filling boat with ice they lost at least a 3rd of it over the sides thus skewing the measure of ice actually in the boat.
Also ice is less dense than water but as the ice melts it'll quickly flood the boat which might sink it.
In most storms that produce large hail there is also wind speed and harsh waves which contribute more to sinking than the hail does.
Hail is still pretty dangerous but not the causal factor to sinking boats.
Relax Matilda
what a great way to crack your zoom boom as an ndt inspector i hate to see it james that is not a crane a crane has a load line and a winch they made a rop load line and used a truck as the motor ingeniously dangerous
Is that not exactly what they said?
there-s no hail storm with one single hail ball.. they are hundreds if not thousands. i think there would be holes with just the terminal velocity (80 mph) speed multiple hails... c'mon myth bustets.. wth.. even the redhead said fire more at one point....
Just watched video with my bro and we both came up with a point......if its night time 1 my passengers are asleep and dont need a light....and to for length of time I would run a passenger train backing up yeah they can suffer
...but just kidding well done
Don't forget, it's a TV show.
Is it in? Poor Grant.....
This is the only time the series makes a mistake blatanly obvius. If you watch the original movie you can see the bomb is an incendiary device and stallone jumps BEFORE the bridge falls off
I would have to say rewatching these with far more knowledge than the first time most episodes have massive holes in the science
it’s kinda frustrating but hey that’s what makes us want learn we think differently for others and can’t argue this show got so many interested in stem or attest made those that where more main stream
Yes but even with this factor the distance is to big.
In Hollywood every bomb is an incendiary and they blew up multiple times.
We need Adam to test it...
The clip is ON youtube, you can see it for yourself. I just did, and Stallone steps twice before jumping, AFTER the bomb explodes. You're wrong on this.
In the bridge jump,the person should be more to the one side,not in the middle. (I haven't seen the movie,i assume he was few steps before the end of the bridge.
10 inches is huge..
😂
That's what she said! ;)
The small scale bridge was definitely NOT too scale ...the wood used was SOOOO a thick
is it me or does that dry dock look kinda small? for context i work in a dockyard that regularly has cruise ships in and can hold a aircraft carrier......just
Surely they're not all made for the biggest ships in the world.
Hail hitting the boat at terminal velocity, piercing it wasn't possible because you kept hitting the support beam then moved on. Very fabricated results.
A lot of commenters here failed to understand one fundamental. Ice is solid water and it takes up more space than liquid. It also floats. This means that if you’re in an open boat and you’re in a hail storm, your boat will not sink.
Of course the 2 slower hail balls hit the center support rod but when they do 300mph they aim for the obviously weaker bottom area? Is this scripted or what? Kinda feels like they could have skipped 300 if they aimed for not the beam but the flat area but i guess that would have made the episode shorter
And lmao when they shoot the 150mph ice again on the lake they hit the flat bit lmfao this myth testing was skewed af
It's unfortunate the researchers didn't do a better job of finding out what hail actually is. It's not a block of ice as Richard Hammond showed in an episode of Wild Weather(or similar title) with actual climate scientists it's more like an onion and builds up to the point when gravity pulls it down with layers of ice from inside the thunderstorm.
anyone see the giant dog turd coil at 39:55?
Doesn't make sense! Bridge too heavy. What bridge has slats that are 3 ft thick?
😂❤😂❤
Hail: F=ma