Building A Helium Raft! | MythBusters | Season 4 Episode 9 | Full Episode
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- čas přidán 13. 05. 2024
- The Mythbusters attempt to make a helium-filled raft fly! What will be the outcome? How much helium do they need?
Using science as a tool, Hollywood special effects experts attempt to debunk rumours, urban legends and popular myths that have captivated the minds of many individuals.
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"I can see my house from here, who's car is that in the driveway?"
I think this episode is why we're running out of helium
I heard that helium cannot be made and it is taken from the earth and once it runs out then it's gone.
those stupid party balloons will not exist in the future.
Worth it... Screw the demand for medical use.
We actually aren't running out of helium. Radioactive decay creates helium in the crust of our planet
i was just thinking that while watching this.. did they ever recycle all that helium or did it just get let into the air
Please all of u do not believe what they say about running out of natural things n this cap about only fossil fuels..the earth renews all of its self all of our air all if our water mall of our gases..we will not run our maybe in an area n move to the next but the earth will renew..remake it is built to do so. It's all renewable do we need to be careful n protect our earth. Yes but it will remake n renew blessings to all
For anyone curious I looked into that Zurich crash, they did investigate phones, but it turned up nothing, it did not cause the crash. What's more phones have never been *definitively* shown to cause enough EMI to affect instruments in flight. There *are* a few studies that suggest that in lab conditions it *may* be possible especially on older hardware, and there are anecdotal reports of some specific devices causing issues on real flights, but it's hard to corroborate these. Instead the reason they were banned officially was cell tower hopping and it was the FCC that instituted this ban initially as it was disruptive. It is true though that the FAA is very conservative with new technology and has specified that it's up to the operators of the aircraft determining that it won't cause issues.
Edit: and Hindenburg was *supposed* to be filled with Hydrogen, not Helium, so it's not a 'somehow'. I forgot how early mythbusters had more of these issues
There are a few phones that do cause really bad radio interference. Blackberry phones from 2008 to 2012ish all caused a lot of radio interference (like a buzzing static) whenever you'd get a call. I know it was real because my old blackberry got a text message one time and it made the bus radio go haywire causing the driver to have to turn it down almost all the way. I could see how for that reason alone itd cause havoc on a plane
"...but for some reason [...] it was filled with flammable hydrogen instead." That reason being the US, at that time the only source of a sufficient amount for airship needs, not selling Helium to Germany because of that toothbrush-moustache wearing guy and his henchmen being in charge there.
Yeah, they said as much when they did the Hindenburg.
The US started to ban exports to ANY country in 1925 (so 8 years before the Nazis took power and Germany).
It wasn't because of moustache-man and his henchmen, since in 1936/37 the crimes which they were committing/are going to commit weren't really known yet to the outside world.
Its 2024, you can say Hitler bro. If you're gonna drop a teachable moment on people, go all the way.
@@Damaged7 I had the choice to either do that or drop a History Matters reference. I chose later.
@@Damaged7 it's CZcams, it won't like it
If a phone was any danger to a plane, you would never be permitted to have one on the plane in the first place.
well back when phones first came they did interfere allot with electronics around them. when ever you where about to get a call your TV would make a strange noise before your phone even starts ringing. so i think this was just something left over from the late 1900s when phones could cause problems and it just took a while to get regulations to change. but today tech is so advanced that phone signal poses no threat to other electronics and regulations have cought up which is why you can now have your electronics running on the plane.
@@rampage3337 all that being said, If there was a real danger they would have banned them from planes.
If a gun was a danger to human beings, they wouldn't be permitted to own or carry them.
@@Damaged7 Don't make a false equivalence fallacy.
Things have moved on since this episode.
It would be cool if Adam would make a video on tested letting us know which was more difficult, lead balloon or helium raft.
well one of those worked
He already answered that lead balloon was the hardest myth to make, due to the extreme difficulty of getting thin enough lead.
A raft that flies on helium? Sounds like a zeppelin. 🤔
@@MrXeCute No, it doesn't, by definition, a zeppelin is long and cylindrical in shape and with a rigid framework, no wings, has an engine and contains a gas mixture to make it lighter.
Basicly a Zeppelin is an airboat. So it can be a raft... What they tried to do in a smaller scale, is a raft... but you need too much uplift power, provided by helium to be proficient (you need more square meters to provide that kind of uplift). Learn some basic physics. Basic education in the EU btw. ;)
i love how it says "polished to perfection" and showing a gravel bed.
4:10
Adam: I'm going to jump out. But hold onto the line in case it floats."
Jamie: 🤏
I am so happy that this show is finally on youtube
Interstingly, the "cellphones cause airplanes to crash" myth has actual validity in the present days. 5G services in America operate close to the frequency band used by radar altimeters (3.7-4.0 GHz and 4.2-4.4 GHz respectively), which may cause the above-ground altitude reading to become unreliable. That instrument is primarily used during landing, which sounds bad, but the worst that can happen (assuming a competent flight crew) is a go-around if the pilot can't stabilize the approach. The FAA has certified most aircraft to be safe from this interference, though. Flying within a 5G tower's range is far less risky than being a Boeing whistleblower (0:2 fatalities).
European 5G towers don't have this effect because they operate on a lower frequency band of around 3.4-3.8 GHz.
Thing is the main characteristic of 5G is that it only works on shorter distances. So there's no way it'll be a problem in the air. As you pointed out the instrument that it could interfere with is something that really only gets used during landing to help with line ups. It shouldn't have much of an issue distinguishing the signals in that kind of environment.
"whos car is that in the driveway" has me in stitches. Wasnt even one of the team but a guest haha they decided to roll with it!
Watching this when there's a helium shortage hits different
The cellphone on airplane myth is the most 00 thing possible
The helium raft was awesome
23:12 Listen with your eyes closed
Best episode of Masterchef UK
I love that for some episodes the *official Mythbusters channel* is relying on these pirated rips from the BBC lol
Seems like the BBC just keeps better records.
The look on Kari's face was priceless! "Boys are so funny!"
31:50 unexpected Kratos
Well, one point they didn't bring up about the cellphone interference is that not all planes are maintained at 100% all the time.
If for example some of the shielding was compromised from rodents chewing it, accidentally rubbing against something and causing damage, then Grant's test in the cage showed that it definitely could cause problems
When it comes to cellphones, remember that old cellphones were analog and used very different frequencies that were capable of causing interference with aviation instruments. It’s less about causing a plane to lose control and more about the tiny deflection in the instrument needles that, over 100’s to 1000’s of km’s, becomes a big problem.
The early days of cellphones were actually the 80’s and it was a lot less regulated and a little more Wild West. They understood how instruments worked and how cell phones were being produced and said, “There’s possibility for interference and the pilots wouldn’t know until it was a problem,” so they banned their use.
People don’t want to believe something as simple as a cellphone can cause a significant navigation issue, but it could’ve. More so in the early days, than today. The issue also being that a cellphone is more likely to get a signal during the key stages of flight, during take off and landing. Once flying, the altitude and speed of the plane become a problem when connecting to a tower.
Today, they ask you to turn off devices so you pay attention during takeoff and landing. It’s the same reason you are asked to sit up, put your stuff away and open the windows. You are alert, paying attention and clearing the way should there be an emergency.
I wouldn’t want to test the cellphones of the 80/90’s in those decades. Planes tend to lag in technology by 10-20 years. But today? I’m confident your cellphone is fine. But turn it off and pay attention to what’s going on around you.
17:10
That reason was because Germany had no helium of it's own. The only country at the time with large helium reserves was the United States and Germany had made a deal to buy helium from them but at the last minute the United States changed it's mind.
26:51 This joke hits different today
"More plastic than conventional a lister"😂
Haven't seen a Nav 401 Ramp test kit in years!
At 17:02 “..for some reason… it was filled with Hydrogen…”. From Wikipedia “Because of the Helium Act of 1925, which banned the export of scarce helium on which the US then had a production monopoly, together with the prohibitive cost of the gas, German Zeppelins were forced to use hydrogen as lifting gas, which would gain infamy in the Hindenburg disaster.” Some reason uh, you didn’t gave it to them, that’s the reason.
Haha he said caulk 23:26
This episode really shows how old the show is. Look at those phones!
@8:51 where the commentator says "the more helium you have the more air it displaces and the greater the lift" that is not true, if it was the case then the gas bottle it comes in would be floating away.
It's about volume displacement. As you inflate a normal latex balloon, the greater the pressure is needed to expand that balloon, the more helium you add will only make it heavier as the pressure builds inside, that's why weather balloons are made out of a thinner, more expanding material.
if one cell phone call could take down a plane, I'm pretty damn sure they would take your cell phone away from you before you boarded.
same reason why you can't take a bomb onto a plane.
You do understand how old this show is right? Things change, technology changes. Its not so much that it would crash the plane as interfere with the electronics and instruments. I mean, if you were driving your car and your speedometer didn't work well thats not going to cause you to crash but you probably still don't want to drive like that.
@@Damaged7 Nonsense, even old planes were tested for RF interference, due to things called "lightning", which emit RF signals a million times stronger than a cell phone. (And no, an airplane is not a perfect Faraday cage - it has windows where external RF signals can get through.)
Cell phones were banned primarily because it was the perfect kind of security theater that also helped the bottom line.
@@i.m.9823 it’s about altering the signal being received and giving false information versus causing the plane to crash. As an example of sensitivity, Nickel ore cause significant compass deviations and flying around the northern edge of Lake Superior and Huron can cause, up to 15° compass variations because of the High nickel content in the ground.
The original instruments used for navigation were very sensitive. Planes needed to be tested with all equipment on, to determine how they interfered with each other. A small needle deflection due to interference can have huge consequences over 100’s to 1000’s of km’s. The instruments don’t need to go wild, in fact, that would be ideal because the pilot knows there is a problem. What’s more an issue is a small deflection that the pilot wouldn’t notice and it’s a very tiny window to cause problems. Aviation relied solely on radio frequency instruments up until about 15 years ago. Even though GPS was around before that, it was usually a supplemental tool until very recently and even today, it’s mostly classed as a secondary instrument, even though it’s practically used as primary. Pilots use both, but if there is a conflict in information, there really isn’t a way to test GPS is off, other than using instruments that rely on frequencies and because most planes have more than one frequency based instrument.
GPS has more issues than people think and the radio instruments proved to be more accurate and reliable for 50-60 years, already. That, and it took a long time to update the whole system, to start switching to gps.
Old phones were not as shielded and the regulations on which bands they could use, were not as strict/followed. They operate far more as an analog device than the digital devices we have today. The aviation industry knew for decades that other electronics can cause deviations in the instruments. With the advent of cellphones it became a concern of “We can’t be sure if that phone is safe, but we know similar devices can cause problems, so we want to to turn it off.”
Today, I’d say your phone is safe, today. I have an older plane and fly with my cellphone on, I don’t fly relying on instruments and fly by visual flight rules (VFR). Oddly, one of the biggest instrument errors I’ve seen was putting my hand up on the instrument dash, next to the floating compass, and the nickel in my ring turned the compass s about 30°. Why do you still need to turn it off? Because they want you paying attention to landing and take off and when you are in the air, you are too high and too fast to keep a signal. I fly at 4000’ and have a hard time getting a signal for more than 4-5 minutes.
Lucky for Myth busters there a lot of people who have tried using mobile phones in air and landed successfully.
43:53 out of context 😭
*mmhhh* epic builds are epic *rrrr*
I love how Adam started this myth off by saying 'this one is pretty darn simple'... true Mythbuster style: it'll be anything but simple, just because you said it would be.
Grant was a Genius.
Damn, just when was gonna start to make flying helium-raft, they say don't try this at home :/
if Adams Head got caught in that rope on the slide. This guy when he was younger, lmao
adam pretending he doesnt know how much helium it takes, but he forgot he already flew with helium in season 1
17:15 The reason why the Hindenburg used Hydrogen and not Helium is the US government. The US were the global main supplier of Helium in those days and did not want to sell any to Hitler's Germany, so the Hindenburg had to use hydrogen, which was easy to produce.
I'm surprised that they went through with the big build of the raft. Everything pointed to it failing.
Adams with Helium sounds like a B1 droid 😂
5:30 the math is wrong.
In this case it's as simple as dividing the molar masses of each component with one another since the amount of particles (moles) in 1 L of gas is the same regardless of the type of gas used.
Hence you can calculate the ratio as such:
Ratio = M(N2)/M(He) = 28/4 = 7
Which tells us that 1 L of N2 (dinitrogen - how nitrogen bonds in nature) is 7 times heavier than 1 L of Helium. Not 10 times .. 7 .. So they are off by 30%!
Now, air is 78% N2 mixed with 21% O2 (Oxygen) where the last 1% is (roughly) Argon, a noble gas that - like Helium - does not bond with itself in nature.
Hence we can estimate the ratio a bit better:
Ratio = (M(N2)*0,78+M(O2)*0,21+M(Ar)*0,01)/M(He) = (28*0,78+32*0,21+40*0,01)/4 = 7.24
Which leads us to the conclusion that atmospheric air is approximately 7.24 times heavier than Helium.
i really wish that show would be in metric
The only thing that was busted were their clueless attempt when removing ballast, and just cutting away from one side without any awareness of balancing it and seems no straps was fitted to pull it down, so one side just raised to the ceiling and no way to pull it down.
thats a shame when they conclude "busted" for that "raft" when in wasn't and it clearly would work, as it did on paper - as the lifting power was there, and simply failed from own mistake.
Kudos for effort, but also weird they didn't use any planning when it came to the rigging for controlling it..
just as much Adam & Jamie's error for not guiding and not just Kari Byron cutting the wrong ballast 46:55
They busted the myth because there is no possible way to make a normal raft fly just by filling it with helium
@@theemptyone7650exactly!
Stupid comment
@@theemptyone7650 But they sure didn't need to build a helium balloon that just looked like a raft to prove anything.
@cejannuzi yeah,I know..but they always do that with every myth..they take it to extreme just to prove it's impossible to confirm a myth under normal circumstances
The helium raft would made more sense if they just strapped it all under a huge net and fitted a platform under the net that Adam could walk into, essentially just a hot balloon.
Why not use a modyfied hot air ballon, or, use the net on top of the plastic tubes and chaind it down in the corners.
43:46 😂😂😂
I was literally playing COD Warzone on my flight home from Portugal last week, still alive 😂😂
Different tech, and you no doubt used a satellite mesh network on the plane, as well. Proof positive that tech is really cool, and laws have to catch up.
It's okay, Mythbusters team. Sometimes you have days like this. Two myths with disappointing ends in the same episode. At least you got the data you needed.
43:46 "Once in every generation. The myth come along it does not thrill us..."🤖
Hindenburg was filled with hydrogen because USA had pretty much all helium at the time and did not sell it to Germany in the late 1930s..
It must have been a slow myth day for them to choose a fan made up myth like that raft one.
Regulations certainly don't allow them to blast their plane disturbing frequencies in the open. Unless this is more controlled than this video suggests this is up there with just pointing lasterpointers at airplanes.
Great way to waste the only finite resource on earth 😂
Lmao I was thinking the same thing, literally the only non renewable element on earth and they just go and waste it on this crap 😂
Yeah, screw science when we could fill balloons for childrens parties!
"the only finite resource in[sic] earth"?
_Everything_ on the earth is finite. Even sunlight is finite. It won't stop for millenia yet, but it will stop at one point.
Entropy has the final say anyway.
Fossil fuels are finite as well.
Granted I’m not thrilled about the helium useage but it’s drops in the ocean compared to military applications.
Cell phones and aircraft equipment don't use the same frequency. It is not an issue.
You do understand how old this show is right?
Back in the late 90s, cell phones could shut off your tv if you got a call. Way different bands and tech than nowadays. Bear in mind, also, that the shielding tech has gotten way better. It's why the older dial-type gauges reacted to the old band cell phones used to use, but the newer ones they tested on gave no response. It's a simple matter of 'tech improvement' leading to reconsideration of older laws.
In modern times we tell people that because they're more likely to follow the instructions the real reason is because the safety briefing is important even for experienced flyers. And in the case of a crash most likely to happen during take off and landing having everyone mental prepared to get up and get off quickly is super important. Having your phone in your hand and earphones in can greatly increase the amount of time before you brace and sometimes all you have is seconds
@@thecandyman5321 If that were the case then they would confiscate books, magazines and newspapers as well.
To be fair as soon as they showed the balloons lifting a small kid... we all knew just how big a "raft" would have to be.
If they'd had a way to cut out a lot of the material and instead make a more efficient chamber for it, it would have been smaller, but the sheer volume of helium needed is just impractical. Absolutely.
Anyone else oddly appreciating a odd sounding Jamie
Isn't that just an airship but worse?
In the U.S., Federal Communications Commission (FCC) regulations prohibit the use of mobile phones aboard aircraft in flight. Contrary to popular misconception, the Federal Aviation Administration (FAA) does not actually prohibit the use of personal electronic devices (including cell phones) on aircraft. Paragraph (b)(5) of 14 CFR 91.21 permits airlines to determine if devices can be used in flight, allowing use of "any other portable electronic device that the operator of the aircraft has determined will not cause interference with the navigation or communication system of the aircraft on which it is to be used."
What the hell is a "seat phone"?? I've never even heard of something like that.
They were very common in the late 90s and early 00s. They've largely been phased out nowadays. It was basically a satphone the the airlines would run and charge an arm and a leg to use. The instrumentation the plane had allowed them to work without interfering with the electronics in the plane, but with Mesh networks and better shielding, that isn't a problem these days.
You know when you go on a plane there's a little touchscreen on the back of the seat for you to use? There used to be phones there instead.
is this helium which is so light that Earth literally can't prevent it from leaving the atmosphere into space, the stuff we need to run MRI scanners? naaaa it's probably different helium right
I bet there is going to be a day when helium will be worth more than gold by volume
I know this is decade + ago but ngl, not thrilled at the amount of He being used and not being recycled.
Look at how many helium balloons it took to lift a little girl. You think somehow a raft will lift an adult? Game over.
48:00
23:14
not completely way out there to maybe think that private jets might have better electronics vs your average airliner for normal people
US authorities say no to phones on planes.
Australian authorities say, yes.
What about other countries?
The EU now allows phones on planes but when the episode was filmed they were still banned.
Lolll
Here in germany I can easily take my phone on a plane and nobody would arrest me and the plane wouldnt crash. Maybe the US needs to update its frequency list so that the handful of mobile carrier frequencies will not be used in a plane.
This was from an episode almost 20 years ago. The laws have changed since then, because shielding on planes has gotten far better, and cell carriers use different frequency bands. Those bands are tested THOROUGHLY before anyone gets to use them, just in case. This episode pretty much highlighted to the FAA that the laws needed updating REGULARLY to keep up. FAA puts out new guidelines every year now.
Germany isn't special, the entire rest of the world also takes their phones and other electronic devices on planes. You understand how old this show is right? Oh BTW, check your super advanced German phone as it probably doesn't have an airplane mode on it since you never needed it right?
Anyone know the episode where Tory acts like a nerd (You can see it shown at @0:59 on this video)
It's a raft that can't work as a raft. They should have started with one of their real rafts, and then built up. How this one went so off-track seems to go back to that 2 hour confab--which resulted in a really dumb plan. Sorry to say.
Over a decade, probably, since this episode was released. And just now am I seeing this episode for the first time
4:12 It's moments like this that remind me that occasionally, Jamie is funnier than Adam
what's the deal with th BBC logo? did MythBusters aired on BBC?
Jamie "that's what we're good a, a little bit if co*k" he said cork right?
Caulk
Thats the place where Grant got his Intracranial aneurysm 28:25
There was a program years ago that they filled balloons and they took too the air with them filled with helium and came back down by bursting the balloons
boo to the laws man! down with the man!!.no fly! if you can't call!!!.
Acesti limitator pune in pericol viata motociclistilor, avand drumuri oricum slab iluminate si slab semnalizate, pana la introducerea unui nou indicator care sa avertizeze soferii de acest limitator, poezia de pe alte panourile aditionale ale acestui limitator sunt cel putin periculoase. Poate duce la victime pe trotuar, pierderea controlului masinii datorita acestui limitator, ranirea sau chiar decesul motociclistilor, distrugerea bunurilor personale.
total waste of time and money
Obscene waste of He.
Incompetent as usual.
Good old days when TV was fun to watch. And they made shows that people liked it... Not like nowadays woke virtue signaling crap
When the emphasis was on doing stuff, rather than people
Time to go back to bed, grandpa
‘Woke’ used as a negative, opinion useless
What are some more great shows you can name from the period?
Can we reach to first comment (like please)
Please
Greetings from Germany
Are you even human? That includes @borntoclimb7116
Kari makes this show unwatchable
Why?
@@uknownhero2764because he is simping
You crazy mate ❤
Yet, HERE YOU ARE🤣😂
Can you not hold it in when you see her?