Spain and the S-80 class Submarine

Does Gib have space?
 
Were Abbey Wood involved?

A former Spanish official told the Associated Press at the time that someone had put a decimal point in the wrong place, and "nobody paid attention to review the calculations".
 
When they welded the extra bit in, what was it for? Presumably it was already designed with everything it needed. Does it now have an onboard gym and jacuzzi?
 
All submarines require a proportion of "reserve buoyancy" which is the ecess of buoyancy over weight. Submarines are designed as warships and have an expectation of taking on some water in a battle situation. The reserve buoyancy has to be sufficient to account for a certain amount of water taken on as a proportion of the overall weight of the boat.
The extra 10m of length I would expect to contain a large proportion of buoyancy tanks.
 
Can potenntially be used for several things, possibly additional accommodation e.g. for special forces, or else additional Air Independent Propulsion systems / fuel.

S-80-class submarine - Wikipedia

Edited to add that several other AIP submarines have had "plugs" of varying lengths fitted after construction for AIP systems.
 
The AIP sounds reasonably scary.... Heat alcohol into a steam to release hydrogen then burn it using stored liquid Oxygen...

1) Large tanks of ethanol locked in a steel box with sailors... is this wise :)

2)Any Dolphins wish to comment on the desirability of being underwater with a large stock of liquid Oxygen?
 
The AIP sounds reasonably scary.... Heat alcohol into a steam to release hydrogen then burn it using stored liquid Oxygen...

1) Large tanks of ethanol locked in a steel box with sailors... is this wise :)

2)Any Dolphins wish to comment on the desirability of being underwater with a large stock of liquid Oxygen?
Would it be much worse than spending six months at a time living underwater next to a nuclear reactor and enough nuclear warheads to destroy most countries two or three times over?
 
The AIP sounds reasonably scary.... Heat alcohol into a steam to release hydrogen then burn it using stored liquid Oxygen...

1) Large tanks of ethanol locked in a steel box with sailors... is this wise :)

2)Any Dolphins wish to comment on the desirability of being underwater with a large stock of liquid Oxygen?
It's becoming pretty well proven technology and has been in use for over 15 years.

Sort of an interim between conventional diesel electric U-boat technology and nuke boats. Can give an underwater endurance of about 3 weeks.

Type 212

Sweden also has AIP boats albeit using a Stirling engine.
The Siemens system is more advanced
 
This sounds familiar. IIRC, the US S-Class submarine had a problem where the boat would sink if the engine room filled with water. They fixed this issue by adding a hull segment behind the conning tower that did nothing more than add additional buoyancy. Saved the whole class.

Have to dig out my copy of the USS Squalus rescue which mentions this tonight and verify this.
 

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