@JRock005 Conventional submarines usually operate at about 120-150 feet below the surface and about 50 ft when using the periscope. Their working max depth is usually about 400 ft. Nuclear subs can go deeper but most submarines operate at about 120 feet depth when submerged. 120 feet is a safe depth to avoid collision with supertankers which can be hard to hear coming sometimes... if they are coming straight at you their hull hides a lot of the propeller noise.
@JRock005 Once the ballast tanks are empty the submarine is neutrally bouyant and adjusts its buoyancy with internal trim tanks. Water is very heavy so a few gallons makes a lot of difference.
diesel submarines only run their diesel on the surface when they can expel the fumes out of the ventilation system, most submarines these days are nuclear so there for they do not need to be on the surface to charge a battery for when they are submerged
@camry1971 The submarine has a snorkel periscope... a very large tube that sucks air into the submarine at periscope depth to run the diesel engines. It also serves to refresh the on board air supply. The snorkel has a flap valve in case the sub accidentally gets just below the surface from a wave... to keep water from being sucked in. The exhaust goes out another exhaust periscope when the diesels are running. The sub usually runs the diesel engines when on the surface.
There are a couple of errors. The Ballast Tanks surround the entire pressure hull on the sides. The fore and aft tanks indicated in this video as the ballast tanks are actually called Trim Tanks and help to balance the fore and aft weight and are not large enough to keep the sub afloat. As well, there is a Quick Flood tank in the forward area which is flooded and vented very quickly to assist in getting the sub under water. I was a submariner... that's why I know.
@DavidSIlvercloud I'm definitely no expert on submarines but I thought the ballast tanks' location differed since some submarines use a double hull design?
@DavidSIlvercloud All submarines are double hulled. The outer hull IS the ballast tanks and are open on the bottom with vents on the top. They are flooded by opening the vents and water comes in from the bottom. To surface, the vents are closed and high pressure air is blown into them. They need not be overly thick because they are always in near equal pressure to the sea water on the "outside" while the Pressure Hull can be up to 2" thick or more to resist the crushing pressure of depth.
@Sidieriul The ballast tanks are open to the sea on the bottoms of the tank and there are vents on the top... large valves which are controlled by hand from inside the submarine. When the vents are opened, the air rushes out and the sea water runs into the tanks from the bottom. To surface, the vents are shut and high pressure air is blown into the tanks pushing the water out the open holes in the bottom of the tanks. It's a very simple but effective system.
@DavidSIlvercloud not all subs are double hulled, im not sure where you are getting you info but most subs are entirely different in design but use the same principle, some ballast tanks are in fact inside the pressure hull
@TAC8808 I got my information from serving as an officer aboard 3 different submarines. I mentioned the interior tanks which are called "trim" tanks. And the fast fill and expel tank in the bow for diving. The main floatation tanks do not require super strength and you don't want to waste precious interior space with water tanks when not necessary... hence the ballast tanks on the outside of the pressure hull. Deep sea submersibles will not require the huge ballast tanks.
@TAC8808 Yes, the trim tanks and rapid flood tanks are inside the pressure hull. It is necessary to have external ballast tanks to keep the centre of gravity low... i.e. the tanks with the air have to be shaped to allow the air to be near the top of the hull on the surface or else the sub would flip over on its side. By being double hulled the submarine can be shaped to be very torpedo like. The actual pressure hull is a tube... perfectly round which is the best shape to resist pressure.
Tell us something we don't know
steveo1274 2 weeks ago
thanks for the info.
makeiteasyable 2 months ago
this is how my boyfriend explained taking a shit after not going for some time :/
SuperDemonkitty 3 months ago
nice video , Thumbs up
lonlytheonly 5 months ago
what a brilliant invention
GlassPike 7 months ago
virgina...
TheOveruled 10 months ago
I didn't this. But how do they go deep into the ocean?
JRock005 1 year ago
@JRock005 Conventional submarines usually operate at about 120-150 feet below the surface and about 50 ft when using the periscope. Their working max depth is usually about 400 ft. Nuclear subs can go deeper but most submarines operate at about 120 feet depth when submerged. 120 feet is a safe depth to avoid collision with supertankers which can be hard to hear coming sometimes... if they are coming straight at you their hull hides a lot of the propeller noise.
DavidSIlvercloud 1 year ago
@JRock005 Once the ballast tanks are empty the submarine is neutrally bouyant and adjusts its buoyancy with internal trim tanks. Water is very heavy so a few gallons makes a lot of difference.
DavidSIlvercloud 1 year ago
diesel submarines only run their diesel on the surface when they can expel the fumes out of the ventilation system, most submarines these days are nuclear so there for they do not need to be on the surface to charge a battery for when they are submerged
TAC8808 1 year ago
can some one tell me what happens to the fume resulted from burning diesel that runs the engin ? thank you
camry1971 1 year ago
@camry1971 The submarine has a snorkel periscope... a very large tube that sucks air into the submarine at periscope depth to run the diesel engines. It also serves to refresh the on board air supply. The snorkel has a flap valve in case the sub accidentally gets just below the surface from a wave... to keep water from being sucked in. The exhaust goes out another exhaust periscope when the diesels are running. The sub usually runs the diesel engines when on the surface.
DavidSIlvercloud 1 year ago
@DavidSIlvercloud Thank you so much ...
camry1971 1 year ago
this reallly helped me with my homework thankyou
authorhorror 1 year ago
I'm using this in my assignment. :)
AshwinManOfSteel 1 year ago
There are a couple of errors. The Ballast Tanks surround the entire pressure hull on the sides. The fore and aft tanks indicated in this video as the ballast tanks are actually called Trim Tanks and help to balance the fore and aft weight and are not large enough to keep the sub afloat. As well, there is a Quick Flood tank in the forward area which is flooded and vented very quickly to assist in getting the sub under water. I was a submariner... that's why I know.
DavidSIlvercloud 1 year ago
@DavidSIlvercloud I'm definitely no expert on submarines but I thought the ballast tanks' location differed since some submarines use a double hull design?
masonkiller666 1 year ago
@DavidSIlvercloud All submarines are double hulled. The outer hull IS the ballast tanks and are open on the bottom with vents on the top. They are flooded by opening the vents and water comes in from the bottom. To surface, the vents are closed and high pressure air is blown into them. They need not be overly thick because they are always in near equal pressure to the sea water on the "outside" while the Pressure Hull can be up to 2" thick or more to resist the crushing pressure of depth.
DavidSIlvercloud 1 year ago
@DavidSIlvercloud vents on top, water comes in from the bottom when they open?
Sidieriul 1 year ago
@Sidieriul The ballast tanks are open to the sea on the bottoms of the tank and there are vents on the top... large valves which are controlled by hand from inside the submarine. When the vents are opened, the air rushes out and the sea water runs into the tanks from the bottom. To surface, the vents are shut and high pressure air is blown into the tanks pushing the water out the open holes in the bottom of the tanks. It's a very simple but effective system.
DavidSIlvercloud 1 year ago
@DavidSIlvercloud not all subs are double hulled, im not sure where you are getting you info but most subs are entirely different in design but use the same principle, some ballast tanks are in fact inside the pressure hull
TAC8808 1 year ago
@TAC8808 I got my information from serving as an officer aboard 3 different submarines. I mentioned the interior tanks which are called "trim" tanks. And the fast fill and expel tank in the bow for diving. The main floatation tanks do not require super strength and you don't want to waste precious interior space with water tanks when not necessary... hence the ballast tanks on the outside of the pressure hull. Deep sea submersibles will not require the huge ballast tanks.
DavidSIlvercloud 1 year ago
@DavidSIlvercloud well i currently serve on a usn submarine, submarine qualified, i know how US subs work and have a vague idea how others work
TAC8808 1 year ago
@TAC8808 Yes, the trim tanks and rapid flood tanks are inside the pressure hull. It is necessary to have external ballast tanks to keep the centre of gravity low... i.e. the tanks with the air have to be shaped to allow the air to be near the top of the hull on the surface or else the sub would flip over on its side. By being double hulled the submarine can be shaped to be very torpedo like. The actual pressure hull is a tube... perfectly round which is the best shape to resist pressure.
DavidSIlvercloud 1 year ago
Awesome, thanks so much for this helped me alot 5*
Awezumi 2 years ago
thanks i needed this for a school proect, thx alot
cicita101 2 years ago