Spain and the S-80 class Submarine

#3
Does Gib have space?
 
#6
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".
 
#8
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?
 
#9
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.
 
#11
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.
 
#12
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?
 
#13
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?
 
#16
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
 

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