Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.os.linux.misc > #73735

Re: Submarines [Was: Floppies [Was: Re: Microsoft Is Abandoning Windows 11 SE]]

Cross-posted to 2 groups.

Show key headers only | View raw

On 2025-09-09 01:31, Paul wrote:
> On Mon, 9/8/2025 5:25 PM, Carlos E.R. wrote:
>> On 2025-09-08 14:42, Daniel70 wrote:
>>> On 23/08/2025 4:50 am, Carlos E.R. wrote:
>>>> On 2025-08-22 15:59, c186282 wrote:
>>>>> On 8/22/25 6:23 AM, Carlos E.R. wrote:
>>>
>>> <Snip>
>>>
>>>>>> Not knowing much about actual subs in our navy, I'm a bit surprised that a diesel sub vibrates so much, though. Subs are supposed to be silent, but perhaps they aren't when they run the old diesel.
>>>>>
>>>>>     The diesel is mostly to keep the batteries topped-off.
>>>>
>>>> In these subs, the diesel is the main engine. They charge the battery and then they can submerge for a while. Coastal defence is their purpose.
>>>
>>> Yeap .... but the Diesel Engines NEED air to run to re-charge the Batteries which actually propel the Submarine ... as I understand it.
>>
>> Absolutely.
>>
>> You can also run it from compressed air, and exhaust the gases outside (at pressure); but I don't know if that was ever done, except as a test.
>>
>> I know that the Spanish subs from the S80 series do something of the sort, as a temporary hack till the AIP gets finished and installed.
>>
>> https://en.wikipedia.org/wiki/S-80_Plus-class_submarine#Propulsion
>>
> 
>     "Today several navies use air-independent propulsion. Notably Sweden uses Stirling technology
>      on the Gotland-class and Södermanland-class submarines. The Stirling engine is heated by
>      burning diesel fuel with liquid oxygen from cryogenic tanks. A newer development in
>      air-independent propulsion is hydrogen fuel cells, first used on the German Type 212 submarine,
>      with nine 34 kW or two 120 kW cells.
> 
>      Fuel cells are also used in the new Spanish S-80-class submarines although
>      with the fuel stored as ethanol
>      and then converted into hydrogen before use.[92]
>     "
> 
> That seems.... particularly clever where sailors are involved :-) Ethanol ?

Ow! :-D

> Perhaps the crew suggested the best fuel source. And you'd want
> analytical grade, not denatured, to "keep the converted product clean".
> Makes sense. I raise my glass, to those sailor.

Actually, engineers. Cheers! :-)

-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

Back to comp.os.linux.misc | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Re: Floppies [Was: Re: Microsoft Is Abandoning Windows 11 SE] Daniel70 <daniel47@somewhere.someplaceelse> - 2025-09-08 22:42 +1000
  Re: Floppies [Was: Re: Microsoft Is Abandoning Windows 11 SE] Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-09-08 10:31 -0700
    Re: Floppies [Was: Re: Microsoft Is Abandoning Windows 11 SE] Daniel70 <daniel47@somewhere.someplaceelse> - 2025-09-10 22:19 +1000
      Re: Floppies [Was: Re: Microsoft Is Abandoning Windows 11 SE] Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-09-10 08:11 -0700
  Re: Submarines [Was: Floppies [Was: Re: Microsoft Is Abandoning Windows 11 SE]] "Carlos E.R." <robin_listas@es.invalid> - 2025-09-08 23:25 +0200
    Re: Submarines [Was: Floppies [Was: Re: Microsoft Is Abandoning Windows 11 SE]] Paul <nospam@needed.invalid> - 2025-09-08 19:31 -0400
      Re: Submarines [Was: Floppies [Was: Re: Microsoft Is Abandoning Windows 11 SE]] "Carlos E.R." <robin_listas@es.invalid> - 2025-09-09 02:58 +0200
      Re: Submarines [Was: Floppies [Was: Re: Microsoft Is Abandoning Windows 11 SE]] rbowman <bowman@montana.com> - 2025-09-09 02:49 +0000

csiph-web