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#1
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Catamarans have something extra....
* Richard Casady wrote, On 8/20/2007 9:09 AM:
On Mon, 20 Aug 2007 07:56:50 -0400, Jeff wrote: any storm that would capsize a cruising cat. Perhaps you are underestimating to ability of a fool to do the wrong thing at the wrong time. All the big ships will capsize, and not come back. Do you have a point? Are you claiming that in the history of the world, no ship has ever survived a voyage? Of course not. The issue is not one of possibilities, its one of probabilities. I've never claimed its impossible to flip a cat; I've only claimed it doesn't happen that often. And when it does, it usually turns out to be human error, in the form of carrying way too much sail. Moreover, the loss of life is generally low. The self righting vessels are actually rare. During a wartime crossing the Queen Mary came within a degree or so of going over. Wave took out the wheelhouse windows, ninety feet above sea level. Nothing except a submarine is immune to big waves. Of course, those things routinely recover from sinking. I heard that ten thousand shipping containers are lost, during storms, every year. Hit one of those with many small craft, and you may not be concerned with capsizing. This is another risk where cats have a large advantage - there are numerous cases of cats surviving major damage that would sink a monohull in minutes. |
#2
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Catamarans have something extra....
On Mon, 20 Aug 2007 09:59:15 -0400, Jeff wrote:
Perhaps you are underestimating to ability of a fool to do the wrong thing at the wrong time. All the big ships will capsize, and not come back. Do you have a point? There actually are two, the really obvious ones. it usually turns out to be human error, See above, about fools. Then there are good sailors who rarely make mistakes. Sometimes one is all it takes There was the guy on the messdeck of a big ship, in a bad storm. He opened the backing plate on a porthole, was so horrified by what he saw that he failed to properly secure the port. and about fifteen tons of water entered. The water got to the engine room, drowned lots of electrics and the ship evertually sank when it lost all engine power. The self righting vessels are actually rare. During a wartime crossing the Queen Mary came within a degree or so of going over. Wave took out the wheelhouse windows, ninety feet above sea level. Nothing except a submarine is immune to big waves. Of course, those things routinely recover from sinking. I heard that ten thousand shipping containers are lost, during storms, every year. Hit one of those with many small craft, and you may not be concerned with capsizing. This is another risk where cats have a large advantage - there are numerous cases of cats surviving major damage that would sink a monohull in minute Some favor a watertight bulkhead forward on monohulls, with cargo containers in mind. Those things can even mess up a screw on a big ship. |
#3
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Catamarans have something extra....
"Richard Casady" wrote in message ... Some favor a watertight bulkhead forward on monohulls, with cargo containers in mind. Those things can even mess up a screw on a big ship. It is my considered opinion that all containers should be made so that they will sink if they go aglub. |
#4
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Catamarans have something extra....
"KLC Lewis" wrote in message news "Richard Casady" wrote in message ... Some favor a watertight bulkhead forward on monohulls, with cargo containers in mind. Those things can even mess up a screw on a big ship. It is my considered opinion that all containers should be made so that they will sink if they go aglub. And I think for every container that is lost overboard the captain of the ship should be held responsible and fined 1000 dollars. I bet that would put a stop to it. Why is it over in China or Japan the top guy has the blame placed on him and gets shot or has to commit suicide when he screws up royally but in the good ole USA the top guy, no matter how badly he screws up, always manages to blame it on an underling who then takes the fall? Wilbur Hubbard |
#5
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Catamarans have something extra....
On Mon, 20 Aug 2007 15:49:24 -0500, "KLC Lewis"
wrote: It is my considered opinion that all containers should be made so that they will sink if they go aglub. They will unless full of low density water resistant cargo. The doors on the boxes are not watertight. Electronics, with all that foam, just won't sink. CRT's are bouyant. So is wood. Depends entirely on the cargo. With the right cargo a boxboat is basically unsinkable. Read the empty weight stenciled on one that I spotted on I-80. Something over 8000 lbs. and they would weigh over 40 tons if full of water. That is way too heavy for a boxboat, some of those carry 8 000 containers. Those ships will not carry 300 000 tons. that is ridiculous, so the boxes have to weigh much less. They mostly start out very bouyant, but they are not watertight, like I said .Even so they can't be guaranteed to sink. They will take quite a while to, however. even if they do, eventually. A container washed off a ship and spilled a cargo of bathtub ducks. Scientists collected data on currents for years. Had it not come open, it would not have sunk until it dissolved into rust. There are the floating oil drums as well. Casady |
#6
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Catamarans have something extra....
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#8
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Catamarans have something extra....
On Tue, 21 Aug 2007 15:37:21 GMT, (Richard
Casady) wrote: On Tue, 21 Aug 2007 09:19:56 +0700, wrote: On Mon, 20 Aug 2007 22:42:06 GMT, (Richard Casady) wrote: On Mon, 20 Aug 2007 15:49:24 -0500, "KLC Lewis" wrote: It is my considered opinion that all containers should be made so that they will sink if they go aglub. They will unless full of low density water resistant cargo. The doors on the boxes are not watertight. Electronics, with all that foam, just won't sink. CRT's are bouyant. So is wood. Depends entirely on the cargo. With the right cargo a boxboat is basically unsinkable. Read the empty weight stenciled on one that I spotted on I-80. Something over 8000 lbs. and they would weigh over 40 tons if full of water. That is way too heavy for a boxboat, some of those carry 8 000 containers. Those ships will not carry 300 000 tons. that is ridiculous, so the boxes have to weigh much less. They mostly start out very bouyant, but they are not watertight, like I said .Even so they can't be guaranteed to sink. They will take quite a while to, however. even if they do, eventually. A container washed off a ship and spilled a cargo of bathtub ducks. Scientists collected data on currents for years. Had it not come open, it would not have sunk until it dissolved into rust. There are the floating oil drums as well. Casady Actually container ships are rated in 20 ft equivalent containers, The figure I gave was for a twenty foot box. Seemed a lot, so I refigured and got the same forty tons. I used ' The Calculator That Takes No Prisoners,' the HP 48. The Chinese are building some 90 000 ton boxboats. To big for the Canal. Casady If I'm not mistaken the maximum total weight of a 20 ft. container is 35,000 lbs., and a 40 ft. container 45,000 lbs. I believe that the Emma Maersk is considered the largest container carrier in the world with a capacity of at least 11,000 TUE's.. Length 396 M, Breadth 56 M, Draft 30 M. No mention of displacement. 110,000 BHP, a cruising speed of 27K and a crew of 13. Maresk has the reputation of under stating the capacity of their ships and outside estimates of capacity are in the range of 14,000 TEU's giving a possible cargo capacity of 245,000 tons. Bruce in Bangkok (brucepaigeATgmailDOTcom) |
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