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On 9/28/2023 6:50 PM, Jim Wilkins wrote:
> "Snag" wrote in message news:uf4rsv$3sbq8$
2@dont-email.me...
>
> I wouldn`t let a union `trician within a hundred yards of my house .
> But then I was a Navy electrician , and they have actual standards
> besides time in position and timely payment of union dues .
> Snag
>
> ----------------------
>
> I`ve read the Navy isolates all the power, no grounded Neutral, so a
> single short to the hull won`t bring down the system.
That`s part of it , part of the reason is electrolysis . Makes
repairs lots of fun if you have to work on a hot 450V circuit .
>
> Did you learn about the power failure on the battleship USS South Dakota
> at Guadalcanal? Was it really sabotage? I thought the two generators
> were cross-connected without synchronizing them. The damage report was
> written much later and contains known errors.
>
> The fires on South Dakota masked Washington beyond and she scored on
> Kirishima with amazing accuracy. Usually battleships hit each other with
> about 2% of the shells, Washington`s radar-controlled night gunnery was
> closer to 25%. That and the one-sided battle at Leyte are the only
> evidence of how good our battleships were. It suggests what the US
> battleships at Leyte might have done to Yamato if she hadn`t turned
> back. Although they may not have been able to defeat her armor they
> could have destroyed the superstructure and ability to aim, which had
> shut down Bismarck.
>
I`ve never heard about the South Dakota problems , but bringing
another generator that size on line without syncing will make one hell
of a noise as both units destroy themselves . I forget which port we
were in when the guys who hooked up shore power got a pair of cables
crossed . About 30 seconds after the switch the Chief Machinist Mate
grabbed me and said "Get this boat back on ships power NOW I`ve got
several million dollars worth of power plant all running backward and
it`s gonna get ugly real fast . When I engaged the generators the whole
damn ship (400 foot long destroyer) jumped . I figure the only reason it
didn`t jump when they switched was because they were slow enough for
motors and stuff to wind down .
--
Snag
Men don`t protect women because they`re weak .
We protect them because they`re important .
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