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mobby_6kl posted:I'm not super into marine stuff, but I found this to be a fascinating topic and a great article IMO: Reading things like this makes me sad I was turned down for a job in marine salvage. Several friends from college did go into that field and one of them was involved in lifting the kursk. They couldn't lift the thing in one go and decided to use what amounts to a giant band saw to cut it in two. In order to set the speed of the saw and plan the process they asked the russians for the strength and thickness of the steel used for the pressure hull. The russian navy initially didn't want to hand this over. It was a state secret and they were worried the west would be able to make accurate estimates of the sub's maximum depth. The salvaging engineers pointed out that what they were going to do was essentially destructive testing of the sub's hull, so they would find out anyway. After some hushed conversations and an emergency meeting of admirals the russians handed over the steel strength: in the 600 N/mm2 range if I remember right, which was surprisingly low for a modern submarine. Even more surprising was that the cutting process proceded far quicker than scheduled, meaning the steel was weaker than specified. It turned out to be in the range of good quality structural steel. The post-soviet navy had fallen on very hard times.
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Mar 31, 2017 12:58
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| # ¿ May 6, 2024 06:10 |
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