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ABBAFAN
06-27-23, 12:29 PM
I was wondering, why is it that submersibles must descend and rose so slowly? I assume they don’t want to hit the bottom too rapidly and of course shooting up to the surface too fast would present problems but I wondered if there are specific reasons. If a submersible has to make an emergency ascent, how fast could this be done?
August
06-27-23, 01:12 PM
I was wondering, why is it that submersibles must descend and rose so slowly? I assume they don’t want to hit the bottom too rapidly and of course shooting up to the surface too fast would present problems but I wondered if there are specific reasons. If a submersible has to make an emergency ascent, how fast could this be done?


I believe the one that recently imploded had a mechanism which would allow the operator to release its ballast. That would cause it to make an uncontrolled ascent.
em2nought
06-27-23, 02:59 PM
I believe the one that recently imploded had a mechanism which would allow the operator to release its ballast.

They would all lean to starboard. :D
Jeff-Groves
06-27-23, 03:18 PM
They would all lean to starboard. :D

Yeah like that's a good idea.
Under water which side is starboard? And watching Veterans Day Parade this year?
I can't tell you how many marched out of step! For God's sake! Years later and they still can't stay in step!!!
So if told to lean to starboard? To Late! Crunch!
August
06-27-23, 03:33 PM
They would all lean to starboard. :D


https://i.imgur.com/qqjeM2b.jpg
em2nought
06-27-23, 03:35 PM
Yeah like that's a good idea.
Under water which side is starboard? And watching Veterans Day Parade this year?
I can't tell you how many marched out of step! For God's sake! Years later and they still can't stay in step!!!
So if told to lean to starboard? To Late! Crunch!

Port four letter, left four letters, starboard more letters, right more letters. Easy peasy :D

They had redundant methods, but crew moving to one side and then another which would release the rusty old pipes carried as ballast was actually one of those ways.
Jeff-Groves
06-27-23, 04:39 PM
Meh. Easier being a ParaTrooper. Only one direction to remember.
DOWN!
August
06-27-23, 04:46 PM
Meh. Easier being a ParaTrooper. Only one direction to remember.
DOWN!




Most fun you can have with your pants on. :salute:
em2nought
06-27-23, 05:39 PM
https://www.insider.com/titanic-sub-crew-rolled-dislodge-weights-surface-former-passenger-2023-6
ET2SN
06-27-23, 06:27 PM
Easy peasy :D




That depends on which direction you are facing. :O:

Tell the class how the Navy numbers engines and bulkheads. :doh:


For extra credit, how does current flow through a circuit?

:k_confused:
August
06-27-23, 07:12 PM
For extra credit, how does current flow through a circuit?

:k_confused:
Positive to negative but the electrons that make up current flow from negative to positive. Electricity lives by its own rules.
em2nought
06-27-23, 07:55 PM
For extra credit, how does current flow through a circuit?


In my experience current flows from the big @ss batteries that we lugged around to the Detroit Diesel's starter. If that worked then it flowed from the alternator back to the batteries usually, unless the T-Boat threw a belt. :D

I don't remember my YFNB barge/ex ww2 mini sub tender having compartment labels. We didn't have very many compartments. :hmmm:
em2nought
06-28-23, 07:05 AM
From looking at photos, I think I see those rusty pipe section ballasts attached on the starboard side only.