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Current time: February 1, 2025, 4:47 am
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 (January 25, 2025 at 11:20 am)BrianSoddingBoru4 Wrote:(January 25, 2025 at 6:39 am)Deesse23 Wrote: Floating A submarine isnt floating when being underwater?
Cetero censeo religionem delendam esse
 (January 25, 2025 at 11:25 am)Deesse23 Wrote:(January 25, 2025 at 11:20 am)BrianSoddingBoru4 Wrote: If it was floating, it wouldn’t be underwater. No, a floating object has positive buoyancy. A submarine operating underwater is neutrally buoyant.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
Albert Einstein  (January 25, 2025 at 11:25 am)Deesse23 Wrote:(January 25, 2025 at 11:20 am)BrianSoddingBoru4 Wrote: If it was floating, it wouldn’t be underwater. Fair point. Boru
‘I can’t be having with this.’ - Esmeralda Weatherwax
(January 25, 2025 at 11:42 am)AFTT47 Wrote:(January 25, 2025 at 11:25 am)Deesse23 Wrote: A submarine isnt floating when being underwater? I am not a native english speaker, thats why i am asking. Negative buoyancy: sinking Positive buoyancy/already on the surface: floating Neutral buoyancy, underwater (sub):  If it isnt floating, what is it? Is there a difference between colloquial use and dictionaries?
Cetero censeo religionem delendam esse
Positive buoyancy = going up/floating
Negative buoyancy = going down/sinking Neutral buoyancy = staying at the same depth, not rising or sinking
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Suspension. Way back in the 30's us subs were designed to float proper, vboats. Their ability to submerge came down to diving planes at a minimum speed, but this meant that they couldn't sit on station or kill their propulsion.
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Neutral buoyancy is not stable. Any kind of water movement will move it up or down as will momentum. Submarines use something called dive planes which are akin to various control surfaces on an aircraft. They point the nose in the desired direction (up/down) to keep a stable depth. As far as I know, there is no word in the English language for this action.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
Albert Einstein 
At any depth, the sub is floating on the water below it, and sinking through the water above it. When both sinking and floating yield equal force, it is suspended at depth.
![[Image: extraordinarywoo-sig.jpg]](https://i.postimg.cc/zf86M5L7/extraordinarywoo-sig.jpg) (January 25, 2025 at 2:14 pm)Angrboda Wrote: At any depth, the sub is floating on the water below it, and sinking through the water above it. When both sinking and floating yield equal force, it is suspended at depth. I'm sorry Angrboda but that is not correct. A neutrally buoyant object weighs exactly the same as the water it displaces. There is no cancelling out of up and down buoyant forces - the forces do not exist. There will almost always be some vertical movement in a horizontally-stationary sub or if dive planes are in a neutral position but that is because of upward or downward momentum and water movement.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
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