Try watching this immediately after you've just seen that Top Gear episode where James May goes on about Archimedes' principal and then proceeds to sink his sail car boat thing.
MANS4ON: Archimedes did have a dishwasher but she had that day off and Archimedes had to do the dishes himself as his wife was at a woman's empowerment seminar, she told Archimedes he had better have those dishes down by the time she got home or else no buoyancy buoyancy that night
Is even more complex than that.. submarines crusiging change depth by "flying" throught the water.. first they dive and adjust ballast to achieve neutral boyance .. then they propel forward and use the control surfaces to change "altitude" or depth like a plane.. that way they dont need to use the balast tanks much (wich in combat submarines is noisy and also puts stress on the pumps and tanks).. if the submarine loses power or comes to a stop then it cant regulate depth and has to blow or fill the tanks to change depth
WW2 boats had what was called a "Trim Party" comprised of those coming off of watch. They were called when the boat had to change depth. They would run fore to aft and vice versa when needed.
My dad was in the navy and had submarine training. They put a clothesline starboard to port and dove; as they did this the line increasingly gained slack. Literally the sub compresses about a foot.
A nice trick question from math class: "If you are sitting in a boat on a very small lake and you start throwing stones from inside the boat in the water, what happens to the water level of the lake?" The correct answer: It drops! As long as the stones are inside the boat they displace the amount of water according to their weight (1 litre per kilogram), as soon they are submerged they only displace their own volume which is less than a litre per kilogram weight. Only works with things that have a higher density than water, of course.
so nice to see a RUclips channel grow, I remember when this guy was some unknown showing us how to cook in between musical transitions on the recorder and now he has a show on Amazon prime or something. amazing.
+Salvatore Shiggerino True, but sometimes using colorful terminology helps drive across the broader point-that without taking on water, a sub is a surface vessel. And any other vessel with a hole or holes that allow water to come in is, in fact, leaking.
"Mobile phones aren't waterproof" My Sony phone would disagree... Well ultimately nothing is truly "waterproof", but water resistant to certain pressures.
+bluewolf998 It's not a very quantifiable difference. Some good guys came up with a quantifiable definition of waterproof and they give IP ratings for each and every product. Take a look here: en.wikipedia.org/wiki/IP_Code
+bluewolf998 Only if you are worried about getting your feet or hair wet, not filling your lungs full of water. >>>>there is a difference between waterproof and water resistant
+bluewolf998 there is a simple way of describing the difference between the two; water resistant will protect something from water for a certain time and water proof will do it forever.
William Birdsall April 21, 2015 "It’s worth pointing out that while some of these phones get close to being labeled waterproof, we probably should treat them as just resistant to water. In other words, we don’t advise you to deliberately submerge them. But it’s still nice not to have to worry." Read more: www.digitaltrends.com/mobile/best-waterproof-phones/#ixzz3YzXhGcpK Amazing how little research is required to see what the facts are.
Lockemeister I know that its just in my opinion water resistant phone to me are water proof and none are water resistant because if you dry them out in rice the phone still works
+William Birdsall Yes but at the time this video was released (2013), there weren't waterproof phones. But there always have been waterproof phone cases.
+Lockemeister - Amazing, how a little more research is even more useful. Who would've thought! "The [Sony] Z3, M4 Aqua, and even the Z5 (at last check) all have the IP68 Ingress Protection rating for submersion." This means it has the highest IP rating for liquids, an 8. "The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer." The phones are waterproof, and labeled waterproof. They just recommend you don't operate them. *Sources:* www.digitaltrends.com/mobile/sony-xperia-underwater-controversy/ www.dsmt.com/resources/ip-rating-chart/
When a submarine sinks, is some of its compressed air used up/expelled to make room for the water? If so, does this mean it only risk and sink a limited number of times before it runs out of compressed air to expel the water from its ballast tanks? Or, can it somehow generate more compressed air?
+Virideon modern submarines can already produce oxygen and hydrogen under water on their own and if they had a limited amount of dives they would be kind of shitty
+Virideon subs don't normally vent the air in their ballast tanks, normally when they want to sink they move air from the ballast tanks into the main hull, and then pump it from the hull into the ballast tank when they want to rise again. I believe that they can vent the air in the ballast tanks to atmosphere when they need to five quickly to escape enemy fire, but this would produce lots of air bubbles and since subs are normally supposed to be super stealthy that is counter productive.
+Virideon Normally the thing that determines how many times the sub can rise and sink is how much battery storage they have if the do it below snorkel depth, and at or above snorkel depth the amount of fuel on board decides it. Basically the compressors that move the air around use a bit of power, and that's the limiting factor. A nuclear sub has for all intents and purposes "unlimited" fuel, so probably the amount of breathable air for the crew on board is the limiting factor. They have CO2 scrubbers so it ends up being a long time
literally the only reason all mobile phones arent waterproof is that phone companies want us to pay for new phones and know that we cant do anything about it
Aydee R Making phones waterproof costs quite a lot more, and isn't really that worth it. Most people's phones actually don't get wet, not worth making all phones waterproof. Your phone might get wet, and that is a massive pain in the arse, but you can get another one for a lot cheaper than if it was water proof. Its why they don't make all cars 5 star safety - it costs more and really, most people don't crash.
+Evi1M4chine No practical technology. There is theoretical technology that can. Various plasma, EM, quantum mechanical (teleporting the water away from the propeller) and gravitational theories are all applicable here. The last two might qualify as hypothetical more than theoretical and using plasma or EM forces to repel/vaporize water is probably a worthless waste of energy-- but it can be done. I can't think of a better use of a warp drive than to use it to water proof a ship! :D
+Evi1M4chine You can make that shaft waterproof. Similar things are found on the ISS and they are airtight. Granted there are 3 seals or something and it's super expensive and probably not too robust and would require constant replacing on ship that is constantly shaking. But nevertheless theoretically possible.
you have shaft seals that prevent water from coming in and if that fails you have an inflatable shaft seal fed from AV&B and any water that does creep onboard is collected in the bilge, which is then emptied via LP bilge pumps and then pumped over board via the HP bilge pump. technically water comes straight from the sea to inside the submarine via its cooling pipes, method of cooling equipment on board. but everything has a hull valve that can make the submarine watertight.
I believe he made that statement to make sure people differentiate between water-resistant and waterproof. Most phones and watches are actually only water resistant.
That sentence makes no sense. Its waterproof, but it stopped being waterproof because you got water in it? so it wasnt acctualy waterproof`? if it was, the water that ruined its "waterproofynes" wouldn't have come in at all
Hull is not that much of a problem, put some kind of repeater with inside and outside antennas and voila. Water around the ship however is a bit harder to bypass. ;)
Except for the simple fact that cells phones are not allowed on most submarines because of security. Making a way for them to transmit through the hull would be counterproductive to stealth.
DargoDog as long as ship would stay on the surface, yes. The moment it dives a few meters (including antennas), all radio communication cuts down to VLF or even ELF when going deeper. ;)
Hahah. I agree. I've subscribed to this channel a while ago but only the videos with James manage to be so entertaining at the same time they are informative. The others are informative too and I like, but not entertaining.
I never knew that about subs. I thought they used some propulsion (is that the right word I'm looking for?) to push them underwater and keep them there. I love learning stuff like this. Thnx!
Yes, but only slightly. The sensation is no worse than when you take off and climb in a passenger jet plane. Even though the inner pressure hull is 40mm thick, it is still compressed by the outside sea pressure. If you tie a piece of string across the widest part of the pressure hull on the surface, by the time you've dived to a couple of hundred metres, the string will sag by around 6".
"And you can experiment with this very easily doing the washing up! Unless you have a dish washer in which case you'll remain ignorant." I love James explaining stuff! XD
Although everyone has pretty much replied to you about this, it may be interested to know that if say the compression system fails (through an attack or something else) the sub will sink to the ocean floor. If the sub is lucky, it will have enough air to stay neutrally buoyant, othewise its down to Davey Jones locker. In this case, special rescue subs are sent down and dock with the remains of the sub to evac the crew.
A Diver makes basicially the same thing with a Jacket, that can be filled with air (obviously by the air-pressuretank). You need to deflate the jacket to sink down and then fill it up again to have a perfekt bouancy, which sometimes isn't the easiest thing to do as a new diver...
Also, submarines actually get smaller the deeper they go, or at least the inner, "Pressure" hull dos. When diving really deep, during what we'd call a visit to "test depth" we would tie a length of string across the office and watch it go from tight to slack as the hull compressed from the incredible pressure placed on it. If you sink an empty aluminum coke bottle on a weight, send it deep enough and it will come back collapsed. Needless to say, listening to all those pops and pings was somewhat nerve wracking to say the least.
The thing that always gets me on the deep dives is the places where you can feel the deck flex. Now the floating decks mean that there are only a few places where you can feel this but it's still pretty cool.
Ships have to do the same thing, they either take on or lose ballast deepending on their cargo load and to keep the ship level. If a ship has no or very little cargo it needs to take in a great deal of water to avoid being unstable and just floating sideways on the top of the water
Why at 3:16 have they got a magnox type reactor control room made by Babcock and willcock, English electric and Taylor wood row they are the 3 that built all the British magnox reactors
Hi. I subscribe to this channel its a great channel. But I have a request that if you can talk about waves and sound. And give us some info on electric circuits.
I guess they take in new air as they emerge. They also have special tubes, like the periscope, that can scoop up air while the sub is still under water.
In theory , it shouldn't run out of compressed air . Being compressed , it doesn't take a lot of space so they have enough for a couple of hundred dives but they usually start recompresing air as soon as they resurface , so in theory they do not run out of air ... but if they do , yes , they stay on the bottom of the sea , or at least where they are sunken at the moment .
Here's a question for you Mr May. How can whales dive so deep? The vast majority of submarines can only dive to about 250m - 500m (except the specialist ones) whereas Some species of Whale can dive to 6 times that? Thought that might make an interesting episode.
Many many many years of evolution has enabled whales like the sperm whale (giggle!) to dive to great depths. It's estimated that the whale's massive lungs are compressed to a volume just about the size of a teacup when they are at their limits. The lungs are oblong, and compress in a way so they don't crumple, but rather flatten out against each other, and the transportation of oxygen remains unaffected. With the lungs sorted, the rest is easy peasy. Air is the only "part" of your body affected by change of pressure, and it's the same for the whale, so the pressure does not affect the other internal organs, the fat or the meat. if you emptied a human of all air, it too could go to those depths unscathed (but would die due to lack of oxygen...) I hope this answers your question:)
Can any 1 tell me what that coned shape thing on the pile of TV back the presenter screen. I have seen it many times but i cant figure it out what its used for
The book title 20,000 Leagues Under the Sea is refering to traveling 20,000 leagues while under the sea not diving to a depth of 20,000 leagues which is about ten times deeper then the diameter of the Earth.
this video is for the most part correct but ships (surface and sub) have a huge hole in the back where to shaft protruds from the ship (go ahead and snicker) most ships don't have a water tight seal around the shaft while its moving (once again you can snicker) so they use water tored in tanks to displace the would be in coming water.
there's actually more to it though because nuclear subs stay neutrally buoyant so they can drive up to the surface. blowing the water from the tanks is usually used as an emergency measure in the nuclear subs.
The air is compressed every time it takes on water, the more water the more compressed air, when the water is emptied, the compressed air returns to uncompressed air state. So it can't actually run out of compressed air, it just keeps recycling, hope this explains it.
I'm assuming this double hull design is a Brit design because modern US Submarines have their main ballast tanks at the bow and stern of the ship. Then the smaller auxiliary ballast tanks are kept inside the pressure hull, or the "people tank" as we bubble heads call it, and these smaller tanks are used to adjust the trim of the ship to keep it as close a possible to a zero bubble (meaning level in the water). You then use the planes of the ship be they fairwater, bow, or stern planes to "fly" the ship through the water, and exactly like an aircraft the faster you go the more "lift" the planes afford you; so the more weight the boat can carry without sinking.
The water is ocean water. It expels out the submarine, and is sucked in when submersion is required. So there is an air tank and a compressor on-board to control this process. I know this because I was deep-sea diving once, and I got sucked into a Russian submarine. True story!
Listening to James May explains stuff is soothing. Sad Top Gear & Grand Tour both seem to have Clarkson or Hammond interject when things start getting interesting.
Is a water bottle waterproof? Yes and no - it needs to leak water in a controlled way to be a bottle.
A water bottle is waterproof. A water bottle with a hole in it is not. Duh.
Small Moustache Man all water bottles have a hole in them tho...
its not a bottle if it doesnt have a hole. moustache man you are dumb
Tell that to every juicebottle ever..
So, RandomErkki, are you telling me that water bottle cease being bottles when they have their cap on?
Try watching this immediately after you've just seen that Top Gear episode where James May goes on about Archimedes' principal and then proceeds to sink his sail car boat thing.
+emptyangel To be fair, every time it sank it was under tow from a faster craft. Nose went down, water came in.
plus getting the math right whit just the eyes is a bit tricky.
It's pure luck that Archimedes didn't have a dishwasher!
Why is this not a more highly rated comment?
Because, sadly nobody ever reads anything!
You have your wish. It is now top comment.
Oh, COME ON. They didn't have rubber back then. How else would you stop the water from ...leaking around the thingy and also...hmmm
MANS4ON: Archimedes did have a dishwasher but she had that day off and Archimedes had to do the dishes himself as his wife was at a woman's empowerment seminar, she told Archimedes he had better have those dishes down by the time she got home or else no buoyancy buoyancy that night
just found this channel and can't stop watching these videos
For some reason, listening to this man explain things is strangely relaxing. A great way to end a hard days work.
Is even more complex than that..
submarines crusiging change depth by "flying" throught the water.. first they dive and adjust ballast to achieve neutral boyance .. then they propel forward and use the control surfaces to change "altitude" or depth like a plane.. that way they dont need to use the balast tanks much (wich in combat submarines is noisy and also puts stress on the pumps and tanks).. if the submarine loses power or comes to a stop then it cant regulate depth and has to blow or fill the tanks to change depth
Thanks for the explanation!
WW2 boats had what was called a "Trim Party" comprised of those coming off of watch.
They were called when the boat had to change depth. They would run fore to aft and vice versa when needed.
Many US subs also pumped sea water into their fuel tanks as the fuel was consumed in order to control trim. ruclips.net/video/ouxBOsDZQ6Y/видео.html
clarkson would be like JAMES NO BODY CARES STOP WASTING 5 MINUTES TO COME TO THE CONCLUSION THEERE WATER PROOF
its i dont care not i care
+KYLE REES well good dumbass Clarkson is not here is it ? :)
love him too
M Goudsmits no no he is not that is why were bored to tears
KYLE REES I laugh at dumbasses :)
*Two videos in one; I was just about to ask about the mobile phones too.*
I'll like to see James may try to answer some of Jaden Smith's tweets.
I bet Jeremy Clarkson loves these episodes
My dad was in the navy and had submarine training. They put a clothesline starboard to port and dove; as they did this the line increasingly gained slack. Literally the sub compresses about a foot.
Haha that mobile part at the end killed me
A nice trick question from math class: "If you are sitting in a boat on a very small lake and you start throwing stones from inside the boat in the water, what happens to the water level of the lake?" The correct answer: It drops! As long as the stones are inside the boat they displace the amount of water according to their weight (1 litre per kilogram), as soon they are submerged they only displace their own volume which is less than a litre per kilogram weight. Only works with things that have a higher density than water, of course.
Sony Xperia. Phone fit for a submarine captain... (not a very good one)
which, the phone or a captain that owns one of those phone.
(I'll probably get the 50 lashes of the cat for that one.. it was worth it though)
+gorillaau Not sure what you mean... But if a submarine takes on water I would say blame the captain. :D So not a good captain.
+ZeroG84 It wont work in a submarine. There is no signal
I know :)
Xperia army unite!
Love the reaction at the end!
The only ex-Top-Gear host who has the foresight for an alternate career path.
uhm no. Richard presents multiple shows and Jeremy is an journalist for a news paper.
so nice to see a RUclips channel grow, I remember when this guy was some unknown showing us how to cook in between musical transitions on the recorder and now he has a show on Amazon prime or something. amazing.
I've never heard the intentional transfer of liquid to or from a vessel being called "leaking" before.
+Salvatore Shiggerino True, but sometimes using colorful terminology helps drive across the broader point-that without taking on water, a sub is a surface vessel. And any other vessel with a hole or holes that allow water to come in is, in fact, leaking.
Informative and enjoyable. Thanks for making this video.
"Mobile phones aren't waterproof" My Sony phone would disagree... Well ultimately nothing is truly "waterproof", but water resistant to certain pressures.
James May Is Awesome.
That is all, continue with your scheduled programming!
James don't go on about Archimedes. Your calculations were awful and your Herald sank twice ;)
J Field Still won that challenge ;)
Peqqy he’s talking about the second one.
Ok, I subscribed. Now to binge watch!
there is a difference between waterproof and water resistant
+bluewolf998 It's not a very quantifiable difference. Some good guys came up with a quantifiable definition of waterproof and they give IP ratings for each and every product. Take a look here:
en.wikipedia.org/wiki/IP_Code
+bluewolf998 Only if you are worried about getting your feet or hair wet, not filling your lungs full of water.
>>>>there is a difference between waterproof and water resistant
+bluewolf998 there is a simple way of describing the difference between the two; water resistant will protect something from water for a certain time and water proof will do it forever.
I'm from the US and I just discovered your channel. Love it!
There already is waterproof phones
William Birdsall April 21, 2015
"It’s worth pointing out that while some of these phones get close to
being labeled waterproof, we probably should treat them as just
resistant to water. In other words, we don’t advise you to deliberately
submerge them. But it’s still nice not to have to worry."
Read more: www.digitaltrends.com/mobile/best-waterproof-phones/#ixzz3YzXhGcpK
Amazing how little research is required to see what the facts are.
William Birdsall are*
Lockemeister I know that its just in my opinion water resistant phone to me are water proof and none are water resistant because if you dry them out in rice the phone still works
+William Birdsall Yes but at the time this video was released (2013), there weren't waterproof phones. But there always have been waterproof phone cases.
+Lockemeister - Amazing, how a little more research is even more useful.
Who would've thought!
"The [Sony] Z3, M4 Aqua, and even the Z5 (at last check) all have the IP68
Ingress Protection rating for submersion."
This means it has the highest IP rating for liquids, an 8.
"The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer."
The phones are waterproof, and labeled waterproof. They just recommend you don't operate them.
*Sources:*
www.digitaltrends.com/mobile/sony-xperia-underwater-controversy/
www.dsmt.com/resources/ip-rating-chart/
one of the best Q&A!!!!
When a submarine sinks, is some of its compressed air used up/expelled to make room for the water?
If so, does this mean it only risk and sink a limited number of times before it runs out of compressed air to expel the water from its ballast tanks? Or, can it somehow generate more compressed air?
+Virideon modern submarines can already produce oxygen and hydrogen under water on their own and if they had a limited amount of dives they would be kind of shitty
+Anonymuskid Ah, I see. Thanks.
+Virideon subs don't normally vent the air in their ballast tanks, normally when they want to sink they move air from the ballast tanks into the main hull, and then pump it from the hull into the ballast tank when they want to rise again. I believe that they can vent the air in the ballast tanks to atmosphere when they need to five quickly to escape enemy fire, but this would produce lots of air bubbles and since subs are normally supposed to be super stealthy that is counter productive.
+Stevie Wonder That's very interesting, thank you.
+Virideon Normally the thing that determines how many times the sub can rise and sink is how much battery storage they have if the do it below snorkel depth, and at or above snorkel depth the amount of fuel on board decides it. Basically the compressors that move the air around use a bit of power, and that's the limiting factor. A nuclear sub has for all intents and purposes "unlimited" fuel, so probably the amount of breathable air for the crew on board is the limiting factor. They have CO2 scrubbers so it ends up being a long time
This guy is a riot. Love the look on his face when he talks about voiding warranty on mobile phones at the end.
Why aren't all mobiles waterproof? THAT TECHNOLOGY EXISTS!!!
literally the only reason all mobile phones arent waterproof is that phone companies want us to pay for new phones and know that we cant do anything about it
Aydee R No because making phones waterproof cost more money.
Aydee R Making phones waterproof costs quite a lot more, and isn't really that worth it. Most people's phones actually don't get wet, not worth making all phones waterproof.
Your phone might get wet, and that is a massive pain in the arse, but you can get another one for a lot cheaper than if it was water proof.
Its why they don't make all cars 5 star safety - it costs more and really, most people don't crash.
My phone is?
My Samsung s5 are waterproof to a certain level!
Much obliged for this video.
I doubt if any vessel be it ship or submarine is water tight. That's why you need bilge pumps!
+Rob B
The bilge collects condensation.
+Evi1M4chine That is what the shaft seals are for - to drink up the water.
+Evi1M4chine
No practical technology. There is theoretical technology that can.
Various plasma, EM, quantum mechanical (teleporting the water away from the propeller) and gravitational theories are all applicable here.
The last two might qualify as hypothetical more than theoretical and using plasma or EM forces to repel/vaporize water is probably a worthless waste of energy-- but it can be done.
I can't think of a better use of a warp drive than to use it to water proof a ship! :D
+Evi1M4chine You can make that shaft waterproof. Similar things are found on the ISS and they are airtight. Granted there are 3 seals or something and it's super expensive and probably not too robust and would require constant replacing on ship that is constantly shaking. But nevertheless theoretically possible.
you have shaft seals that prevent water from coming in and if that fails you have an inflatable shaft seal fed from AV&B and any water that does creep onboard is collected in the bilge, which is then emptied via LP bilge pumps and then pumped over board via the HP bilge pump. technically water comes straight from the sea to inside the submarine via its cooling pipes, method of cooling equipment on board. but everything has a hull valve that can make the submarine watertight.
Loving the animaties and great explanations!
Actually, Mr. May, sorry to burst your bubble, but SOME phones ARE waterproof. My phone was until it got water in it, now the screen is coming off.
I believe he made that statement to make sure people differentiate between water-resistant and waterproof. Most phones and watches are actually only water resistant.
no phone in the entire world is waterproof. water resistant phones however are can quite common today
That sentence makes no sense. Its waterproof, but it stopped being waterproof because you got water in it? so it wasnt acctualy waterproof`? if it was, the water that ruined its "waterproofynes" wouldn't have come in at all
Alcatraz Aronsson And actually a submarine isn't waterproof but water resistant.
actually most flagship phones these days are waterproof to a certain depth, above said depth they can be fully immersed and remain 100% functional
"Neutral buoyancy: That is, it displaces exactly the weight of the water around it."
Maybe "it displaces exactly its own weight in water"?
My phone's waterproof.
Xperia ftw
"Only in fresh water up to 4.9 feet for 30 minutes."
Amelia Hartman
Im still figuring out how much is 4.9 feet in meters..
Alan Prescott 1.5m
Nope. Water RESISTANT
no xperia is 100% submersible. just like a tough book pro which i use in the bath, like a toy
Now that was quite informative.
reaper be like: DIVE! DIVE! DIVE!!
thereisnospace But heroes never dive...
@James May: Just found your videos, great. Please keep it up.
Waterproof or not, they won't transmit through the hull, so the issue is moot.
Hull is not that much of a problem, put some kind of repeater with inside and outside antennas and voila. Water around the ship however is a bit harder to bypass. ;)
Except for the simple fact that cells phones are not allowed on most submarines because of security. Making a way for them to transmit through the hull would be counterproductive to stealth.
DargoDog
you're right, I just thought we were sticking to physical aspect.
Nope. And yes, a repeater system would solve the problem of transmitting through the hull.
DargoDog
as long as ship would stay on the surface, yes. The moment it dives a few meters (including antennas), all radio communication cuts down to VLF or even ELF when going deeper. ;)
you should make every day a James May's Q&A..
xperia z3,,,,,,,,,,,,,,,,,,
Hahah. I agree. I've subscribed to this channel a while ago but only the videos with James manage to be so entertaining at the same time they are informative. The others are informative too and I like, but not entertaining.
is he from top gear
***** really ?
he was, but top gear is dead now
Cai Strickland yea
no shit!
The Grand Tour*
I actually knew this before watching the video (probably many more did) but i still watched because of James
what was that horrendous face you made?
Bad production.
I never knew that about subs. I thought they used some propulsion (is that the right word I'm looking for?) to push them underwater and keep them there. I love learning stuff like this. Thnx!
Moms spaghetti
Diarrhea
Farsgokkejern Andreasen He’s nervous
Yes, but only slightly. The sensation is no worse than when you take off and climb in a passenger jet plane. Even though the inner pressure hull is 40mm thick, it is still compressed by the outside sea pressure. If you tie a piece of string across the widest part of the pressure hull on the surface, by the time you've dived to a couple of hundred metres, the string will sag by around 6".
I just subscribed. I love stuff like this. Very informative. :)
"And you can experiment with this very easily doing the washing up! Unless you have a dish washer in which case you'll remain ignorant." I love James explaining stuff! XD
james may is just great
fairly good explanation James may
MOAR!
Thanks
I can't recommend Das Boot (the film) enough, its an awesome epic length film showing the WWII german submarine life.
I get asked that all the time. Believe me.
By the way. Thanks to EVERYONE who replied. U guys are awesome :)
Who knew Captain Slow could be so informative?
thanks that's a very informative answer
cant believe i didn't consider the density of the air :P
2:51 "That is, it displaces exactly the weight of the water around it." Hm... That's a lot of water.
Nice clip
I miss these videos with James
Although everyone has pretty much replied to you about this, it may be interested to know that if say the compression system fails (through an attack or something else) the sub will sink to the ocean floor. If the sub is lucky, it will have enough air to stay neutrally buoyant, othewise its down to Davey Jones locker. In this case, special rescue subs are sent down and dock with the remains of the sub to evac the crew.
cool, interesting facts to know
This grasping of Archimedes principal is no doubt why your sailing car sank. Thanks, Capt Slow!😀
This gave me an old school "Blues Clues" vibe. The one with Steve, ofcourse.
That's pretty cool
Tell us more about the stuffing box which seals the prop shaft and if Hammond soaks up and grows, if you leave him outside in the rain!
3:14 understatement
Nice Jumper James!
A Diver makes basicially the same thing with a Jacket, that can be filled with air (obviously by the air-pressuretank).
You need to deflate the jacket to sink down and then fill it up again to have a perfekt bouancy, which sometimes isn't the easiest thing to do as a new diver...
its called a bcd and no it isnt easy the first few times i came up ass first. A bit better now tho.. adv open water/ oct/ meg 50
Also, submarines actually get smaller the deeper they go, or at least the inner, "Pressure" hull dos. When diving really deep, during what we'd call a visit to "test depth" we would tie a length of string across the office and watch it go from tight to slack as the hull compressed from the incredible pressure placed on it. If you sink an empty aluminum coke bottle on a weight, send it deep enough and it will come back collapsed. Needless to say, listening to all those pops and pings was somewhat nerve wracking to say the least.
The thing that always gets me on the deep dives is the places where you can feel the deck flex. Now the floating decks mean that there are only a few places where you can feel this but it's still pretty cool.
that outro with that guys head in a vice was surprisingly violent!
Thank you ^_^
i adore you sir james may.
"Unless you have a dishwasher. In this case you will remain ignorant." .. laughed my ass off harder than i should have :D got my sub :D
Thank you capitan obvious for 4 minutes of video explaining that more more mass is more displacement
nice one James May, ruddy nice one
Ships have to do the same thing, they either take on or lose ballast deepending on their cargo load and to keep the ship level. If a ship has no or very little cargo it needs to take in a great deal of water to avoid being unstable and just floating sideways on the top of the water
The room that is at 3:10 is actually the control room for the nuclear reactor and engine room.
Nice to know that I can check my RUclips notifications on my s9+ if I ever get involved in a sinking submarine.
Why at 3:16 have they got a magnox type reactor control room made by Babcock and willcock, English electric and Taylor wood row they are the 3 that built all the British magnox reactors
Hi. I subscribe to this channel its a great channel. But I have a request that if you can talk about waves and sound. And give us some info on electric circuits.
I guess they take in new air as they emerge. They also have special tubes, like the periscope, that can scoop up air while the sub is still under water.
In theory , it shouldn't run out of compressed air . Being compressed , it doesn't take a lot of space so they have enough for a couple of hundred dives but they usually start recompresing air as soon as they resurface , so in theory they do not run out of air ... but if they do , yes , they stay on the bottom of the sea , or at least where they are sunken at the moment .
Here's a question for you Mr May. How can whales dive so deep? The vast majority of submarines can only dive to about 250m - 500m (except the specialist ones) whereas Some species of Whale can dive to 6 times that? Thought that might make an interesting episode.
its because whale are made of water and muscle not steel so they don't crack under pressure they just implode
Many many many years of evolution has enabled whales like the sperm whale (giggle!) to dive to great depths. It's estimated that the whale's massive lungs are compressed to a volume just about the size of a teacup when they are at their limits. The lungs are oblong, and compress in a way so they don't crumple, but rather flatten out against each other, and the transportation of oxygen remains unaffected. With the lungs sorted, the rest is easy peasy. Air is the only "part" of your body affected by change of pressure, and it's the same for the whale, so the pressure does not affect the other internal organs, the fat or the meat. if you emptied a human of all air, it too could go to those depths unscathed (but would die due to lack of oxygen...)
I hope this answers your question:)
McJaews
thanks, that pretty much sums it up :)
No problem man:)
Can any 1 tell me what that coned shape thing on the pile of TV back the presenter screen. I have seen it many times but i cant figure it out what its used for
The book title 20,000 Leagues Under the Sea is refering to traveling 20,000 leagues while under the sea not diving to a depth of 20,000 leagues which is about ten times deeper then the diameter of the Earth.
amazing facts..I love physics...can I subscribe ??
subscribed..........
You predicted the future!!!!!!!!
this video is for the most part correct but ships (surface and sub) have a huge hole in the back where to shaft protruds from the ship (go ahead and snicker) most ships don't have a water tight seal around the shaft while its moving (once again you can snicker) so they use water tored in tanks to displace the would be in coming water.
there's actually more to it though because nuclear subs stay neutrally buoyant so they can drive up to the surface. blowing the water from the tanks is usually used as an emergency measure in the nuclear subs.
Let's get Top Gear back by liking this post a million times!
How many dives and rises can it do before collecting more air from the surface to compress?
The air is compressed every time it takes on water, the more water the more compressed air, when the water is emptied, the compressed air returns to uncompressed air state. So it can't actually run out of compressed air, it just keeps recycling, hope this explains it.
I'm assuming this double hull design is a Brit design because modern US Submarines have their main ballast tanks at the bow and stern of the ship. Then the smaller auxiliary ballast tanks are kept inside the pressure hull, or the "people tank" as we bubble heads call it, and these smaller tanks are used to adjust the trim of the ship to keep it as close a possible to a zero bubble (meaning level in the water). You then use the planes of the ship be they fairwater, bow, or stern planes to "fly" the ship through the water, and exactly like an aircraft the faster you go the more "lift" the planes afford you; so the more weight the boat can carry without sinking.
The water is ocean water. It expels out the submarine, and is sucked in when submersion is required. So there is an air tank and a compressor on-board to control this process. I know this because I was deep-sea diving once, and I got sucked into a Russian submarine. True story!
Listening to James May explains stuff is soothing. Sad Top Gear & Grand Tour both seem to have Clarkson or Hammond interject when things start getting interesting.
He just did! I would say check it out, but you're probably subscribed and got the same notification I did.
I think ur my favorite of the three