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On Tue, 02 Aug 2005 16:52:41 GMT, Gene Kearns
wrote: On Tue, 02 Aug 2005 15:12:37 GMT, Shortwave Sportfishing wrote: That same technique was used on Hoover Dam. When we were out there a few years ago, one of the documentaries we saw mentioned that sometimes whole gangs of ten/fifteen men would continuously vibrate the cement mixture for as long as 36 hours. WOW..... I wonder how one judges the extent needed? the bubbles stop coming up. -- John H. On the 'PocoLoco' out of Deale, MD |
Shortwave Sportfishing ) wrote:
: On Tue, 02 Aug 2005 13:33:18 GMT, Gene Kearns : wrote: : On Tue, 02 Aug 2005 05:16:54 GMT, "Bill McKee" : wrote: : : : "Gene Kearns" wrote in message : . .. : : Neat stories about their construction, too, from my dad. He worked at : Newport News building them, until he was conscripted in WWII. : : Liberty ships were steel, as well as the Victory ships. My dad spent the : war building them in Richmond, CA and my mom spent the time as a nurse at : the shipyard hospital. The hospital became the first Kaiser hospital. I : remember the small stamped models that we had at home. Probably worth a lot : of money now. First boat I got to pilot. ;) : : : I have to assume that he saw what he saw... : : Apparently, as steel became scarce they, experimented with other forms : of material. One of the stories he recounted was the, to him, : excessive number of hours spent in vibrating the mix in the mold.... : sometimes two shifts. He always expected to see the hull come out with : aggregate on the bottom and sand and cement on top.... though he never : saw one come out that way. : : I assume vibrating a steel ship would just be loud.... : That same technique was used on Hoover Dam. When we were out there a : few years ago, one of the documentaries we saw mentioned that : sometimes whole gangs of ten/fifteen men would continuously vibrate : the cement mixture for as long as 36 hours. Any application of cement requires vibrating it to get the air bubbles out for a smooth consistant pore. Back to my original posting. I guess nobody knows of any boats that were scuttled and left in a field somewhere. I'd like to get one about 50'LOA. I just missed out on a deal last may on a 50' coastal cruiser, nice boat. It had a new coat of bottom and hull paint, engine was end of life, no interior, decking, or rigging. It would have been a big job to refit it. If anyone knew of something similar I'd like to hear about it. Tom -- |
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"Gene Kearns" wrote in message ... On Tue, 02 Aug 2005 05:16:54 GMT, "Bill McKee" wrote: "Gene Kearns" wrote in message . .. Neat stories about their construction, too, from my dad. He worked at Newport News building them, until he was conscripted in WWII. Liberty ships were steel, as well as the Victory ships. My dad spent the war building them in Richmond, CA and my mom spent the time as a nurse at the shipyard hospital. The hospital became the first Kaiser hospital. I remember the small stamped models that we had at home. Probably worth a lot of money now. First boat I got to pilot. ;) I have to assume that he saw what he saw... Apparently, as steel became scarce they, experimented with other forms of material. One of the stories he recounted was the, to him, excessive number of hours spent in vibrating the mix in the mold.... sometimes two shifts. He always expected to see the hull come out with aggregate on the bottom and sand and cement on top.... though he never saw one come out that way. I assume vibrating a steel ship would just be loud.... There were concrete ships made, just not Liberty or Victory ships. They were also made in WW-1. One was never used as the war ended and was bought and towed to the beach south of Santa Cruz, CA. Was fishing pier, dance hall for a coupe of years. About 1928-1930. You can see it at Sea Cliff Beach State Park. |
As I recall, ferro yachts are generally constructed by spraying a concrete
mixture onto an armature which then becomes the rebar for the structure. I believe a similar technique is used on some swimming pools. Spraycrete? Seems close but wrong??? Ferro ships must have been nightmares to build if forms were used. Seems to me to be virtually impossible to do a complete hull in one form. If the hull was made in sections joing the sections would have presented sn interesting problem. Managing the reinforcing inner structure must have been another interesting challange. I think if I wanted a quick and dirty large yacht requiring minimum skills, reasonable completion time and lowest cost I'd build of welded steel for the hull deck and superstructure. Probably use wood for all the interior finishing. With CAD one could even have all the steel cut to shape and delivered ready to bend and weld. Any medium sized yard could do it. Butch "Bill McKee" wrote in message nk.net... "Gene Kearns" wrote in message ... On Tue, 02 Aug 2005 05:16:54 GMT, "Bill McKee" wrote: "Gene Kearns" wrote in message ... Neat stories about their construction, too, from my dad. He worked at Newport News building them, until he was conscripted in WWII. Liberty ships were steel, as well as the Victory ships. My dad spent the war building them in Richmond, CA and my mom spent the time as a nurse at the shipyard hospital. The hospital became the first Kaiser hospital. I remember the small stamped models that we had at home. Probably worth a lot of money now. First boat I got to pilot. ;) I have to assume that he saw what he saw... Apparently, as steel became scarce they, experimented with other forms of material. One of the stories he recounted was the, to him, excessive number of hours spent in vibrating the mix in the mold.... sometimes two shifts. He always expected to see the hull come out with aggregate on the bottom and sand and cement on top.... though he never saw one come out that way. I assume vibrating a steel ship would just be loud.... There were concrete ships made, just not Liberty or Victory ships. They were also made in WW-1. One was never used as the war ended and was bought and towed to the beach south of Santa Cruz, CA. Was fishing pier, dance hall for a coupe of years. About 1928-1930. You can see it at Sea Cliff Beach State Park. |
HarryKrause ) wrote: : Thomas D. Ireland wrote: : HarryKrause ) wrote: : : Gene Kearns wrote: : : On Mon, 01 Aug 2005 12:28:49 GMT, "Butch Davis" : : wrote: : : . : : At the time he finished the project he told me it was about four times as : : much work and expense as he had estimated when he began. He told me he : : would never again try to restore a ferrocement boat and that he believed it : : would have been cheaper, faster and easier to start from scratch with a new : : armature. : : : : : : I can't imagine delving into such a repair without significant and : : expensive NDI equipment. How one could determine the condition of the : : "ferro" inside the cement without such is beyond me.... and *not* : : determining it would yield a finished job with no guarantee of : : structural integrity. : : : : There would be enough challenges involved in restoring a fiberglass or : : wooden boat... if you just need a hobby. : : : : If you want to actually go boating.... get a fixer upper. Come to : : think of it, even a new boat, trailer, motor combination has enough : : upkeep to classify as a hobby.... : : : : ...YMMV.... : : : : : I cannot imagine why anyone would want to build or buy a ferrocement : : tub. Wood is the way to go, if your starting from scratch, and several : : posters here and in other boating groups have shared great photos and : : stories with us of boats they have built of wood, wood-epoxy, wood : : sheathed in fiberglass and fiberglass. Even if you want to build a : : honking big sailboat, you can buy a fiberglass hull, finish it off, and : : have a nice boat. : : I think I would like the stability a heavy boat would offer. It would be a : much nicer ride I think. There are lots of pros and cons though. : : Tom : : -- : On a sailboat, your stability comes from the weight in your keel working : against the lateral push from your sails. Perhaps a "built-down" ferro : sailboat hull might have significant stability, but I'd rather enjoy the : ride on a properly keeled glass sailboat of the same size class. -- If you want to go first class all the way it is going to cost you. I want to get value for my dollar and this seemed to be good way to do that. My 2C worth! Tom |
My closest memories to that would be seeing a bay chocked with wooden
built PT boats and the sky full of aircraft like an airborn hive of bees. Tom Gene Kearns ) wrote: : On Mon, 01 Aug 2005 14:21:47 -0400, HarryKrause : wrote: : : : On a sailboat, your stability comes from the weight in your keel working : against the lateral push from your sails. Perhaps a "built-down" ferro : sailboat hull might have significant stability, but I'd rather enjoy the : ride on a properly keeled glass sailboat of the same size class. : But those liberty ships were pretty neat, too. I remember coming into : Wilmington, NC as a kid and seeing Liberty Ships moored in the Cape : Fear River as far as the eye could see.... : Neat stories about their construction, too, from my dad. He worked at : Newport News building them, until he was conscripted in WWII. -- |
Gene Kearns ) wrote:
: On Tue, 02 Aug 2005 23:06:04 GMT, "Butch Davis" : wrote: : As I recall, ferro yachts are generally constructed by spraying a concrete : mixture onto an armature which then becomes the rebar for the structure. I : believe a similar technique is used on some swimming pools. Spraycrete? : Seems close but wrong??? : : Gunnite... Gunnite is correct, for a minute I couldn't remember what it was called! Tom : or shotcrete. : -- : _ ___c : \ _| \_ : __\_| oooo \_____ : ~~~~|______________/ ~~~~~ : ~~~ ~~~~~~ : ~~~ ~~~~~ ~~~~~~~~~ : ~~~~ }((((o ~~~~~~ }{{{{o ~~~~~~~ : Grady-White Gulfstream, out of Southport, NC. : http://myworkshop.idleplay.net/ Homepage* : http://www.thebayguide.com/rec.boats Rec.boats at Lee Yeaton's Bayguide -- |
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