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

From	Paul <nospam@needed.invalid>
Newsgroups	comp.os.linux.misc, alt.comp.os.windows-11
Subject	Re: Submarines [Was: Floppies [Was: Re: Microsoft Is Abandoning Windows 11 SE]]
Date	2025-09-08 19:31 -0400
Organization	A noiseless patient Spider
Message-ID	<109np0e$k196$1@dont-email.me> (permalink)
References	(15 earlier) <b2tlnlx7n5.ln2@Telcontar.valinor> <iIOdnTJSfaMj6jX1nZ2dnZfqn_SdnZ2d@giganews.com> <fpqmnlxb5c.ln2@Telcontar.valinor> <109mius$9sjk$1@dont-email.me> <67u3plxjtc.ln2@Telcontar.valinor>

Cross-posted to 2 groups.

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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 ?

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.

   Paul


   Paul

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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

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