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NNTP-Posting-Date: Sat, 17 May 2025 12:39:33 +0000
From: Joe Gwinn <joegwinn@comcast.net>
Newsgroups: sci.electronics.design
Subject: Re: The Spanish Grid Drop-out - recently released information.
Date: Sat, 17 May 2025 08:39:23 -0400
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On Fri, 16 May 2025 19:15:29 -0700, KevinJ93 <kevin_es@whitedigs.com>
wrote:

>On 5/15/25 11:23 PM, Liz Tuddenham wrote:
>> Bill Sloman <bill.sloman@ieee.org> wrote:
>> 
>>> On 16/05/2025 3:51 am, john larkin wrote:
>>>> On Thu, 15 May 2025 12:37:24 +0200, "Carlos E.R."
>>>> <robin_listas@es.invalid> wrote:
>>>>
>>>>> On 2025-05-15 08:18, Bill Sloman wrote:
>>>>>> On 15/05/2025 5:14 am, Carlos E.R. wrote:
>>>>>>> On 2025-05-14 16:16, Glen Walpert wrote:
>>>>>>>> On Tue, 13 May 2025 07:50:36 -0700, Don Y wrote:
>>>>>>>>
>>>>>>>>> On 5/13/2025 6:26 AM, Glen Walpert wrote:
>>>
>>>>> Another very wild idea was increasing the frequency to around 600Hz. It
>>>>> would make transformers and all coiled things smaller. Planes do this.
>>>>> Possibly would also radiate more. And would not help with control.
>>>>
>>>> But our clocks would run ten times faster.
>>>>
>>>> And everything would hum.
>>>
>>> This doesn't happen in aircraft.
>> 
>> The ambient noise level in an aeroplane is much higher than in a house
>> on a quiet night. (Also, look up Fletcher-Munson curves to see why 600
>> c/s would be a lot worse than 50 or 60 c/s.)
>> 
>> Alternators for 600 c/s are feasible at a few kW in aircraft but they
>> are difficult to scale up to power station size.
>> 
>
>A modern large aircraft may have close to a megawatt of generation capacity.

That seems too paltry.

..<https://en.wikipedia.org/wiki/Nimitz-class_aircraft_carrier>

Propulsion is 190 Megawatts.  In earlier ships, this would be all
steam and mechanical.  

..<https://en.wikipedia.org/wiki/USS_John_F._Kennedy_(CVN-79)>

Later ships are increasingly electric, to support modern things like
big radars, electromagnetic launch systems, lasers, railguns, and so
on.

Joe