本帖最后由 choi 于 12-13-2015 11:51 编辑
(e) "The Hull is the key to the Soryu's strength and its ability to drive deep. It is made with special steel and the Japanese say that through precision engineering they have come as close as possible to what submariners call the perfect circle."
Lee Vyborny and Don Davis, America's Secret Submarine; An insider's account of the Cold War's undercover nuclear sub. Lulu.com, September 14, 2015, page number unmarked (an e-book).
https://books.google.com/books?i ... 0circle&f=false
four consecutive paragraphs:
"perhaps the most important part of the entire boat [submarine], the pressure hull. Without it, there could be no ship. Submarine hulls were usually just long, round, empty steel tubes, affectionately called sewer pipes, a serially molded rings that are joined and capped with round hemispheres at each end. Over the year, the shape had proven to be the best method to withstand the immense pressure exerted by water at depth.
"Never before, however, had any hull required the exacting standards demanded for the NR-1. In order to survive great depths, the long cylinder had to be an almost perfect circle, the most precise ever turned out by Electric Boat. Forty flawless plates of top-grade HY-80 steel, with no impurities whatever, were given tender love and care during the manufacturing process at the Lukens Steel plant in Coatesville, Pennsylvania, and arrived at EB aboard special flatbed railcars. Each weighed four tons.
"Huge machines rolled those big plates - eight feet wide, ten feet long and two and three-quarters inches thick - again and again, squeezing them with tons of pressure. The top roller was smaller than the bottom roller, so with each pass, the steel plate was gently curved a bit more until it formed what would be one-quarter of a circle. Like pieces of jigsaw puzzle, four of those plates would be put together to become a cylinder. The cylinders would be welded together to form the hull.
"The major problem was that EB had to be so exact in this process. Normal submarine hulls could be a little out of shape, with an acceptable circular tolerance of several inches. But Henry Furuno [Japanese surname 古野], the head of the EB hull design department, calculated that for the NR-1, the twelve-and-one-half-foot diameter of each cylinder could vary by no more one-sixteenth of an inch - virtually a perfect circle of heavy steel.
* This submarine at issue is
American submarine NR-1
https://en.wikipedia.org/wiki/American_submarine_NR-1
(1969-2008; nuclear-powered; was the smallest nuclear submarine ever put into operation; The vessel was never officially named or commissioned; These missions remain classified and few details have been made public; to a depth of almost half a nautical mile (1 nm = 1,852 meters))
(f) "Master chief petty officer Katsuyuki Matsui from SS Kokuryu"
(i) "Master chief petty officer is the ninth, and highest, enlisted rate (pay grade E-9) in the US Navy and US Coast Guard, just above senior chief petty officer."
https://en.wikipedia.org/wiki/Master_chief_petty_officer
But this Wiki page never explains the job function.
(ii) Master chief petty officer is one rank above "senior chief petty officer," who is in turn a rank above "chief petty officer."
(iii) (by US Navy), Silent Professionals: History of the Rank of Chief Petty Officer. Navy Live; The official blog of the United States Navy, Mar 31, 2015
navylive.dodlive.mil/2015/03/31/happy-122nd-birthday-chief-petty-officers/
("Effectively running and fighting a warship relies on bridging the gap between officers and enlisted personnel. It was from this need that the creation of the rank of chief petty officer was born. * * * The rank of chief petty officer as it is recognized today was officially established April 1, 1893")
(g) "Former Soryu submarine commander Toshihide YAMAUCHI 山内 敏秀 [1948- ]" |
发表于 12-13-2015 11:44:23
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