facthunter Posted December 15, 2022 Posted December 15, 2022 If you spill the wine glass you can't hold your Liquor. Nev 1
red750 Posted December 17, 2022 Posted December 17, 2022 Provided the brick yacht displaces water weighing more than itself, it should float. There have been many cement yachts, like this one near our old men's shed, although it looks like it has never been near water. It has been there for more than the 10 years I have attended the shed, and from the size of the tree and hedge it doesn't look like it has moved an inch. 2
onetrack Posted December 17, 2022 Posted December 17, 2022 I watched a bloke build a steel cruiser in his workshop yard in the town of Corrigin in W.A. for over 20 years. He built the cruiser from scratch, from purchased plans. He was a steel fabricator by trade. Apparently the only thing he didn't do himself on the cruiser, was the curved steel part of the bow, he got a shipbuilder in from Perth to do that curved part for him. Slowly but surely over the years, the cruiser took shape - then one day, it was gone! He'd finished it, and had it trucked to the coast, where it turned out to be a very successful, fully completed boat, which he apparently enjoyed cruising in, in his retirement, for quite a number of years.
facthunter Posted December 17, 2022 Posted December 17, 2022 The bloke I worked for in the 50's built a steel hulled refrigerated Trawler and sent it up in the Gulf of Carpentaria many years ahead of anyone else. Also built parts for the Polar diesel engines for the first Empress of Tasmania. nev 1
willedoo Posted December 18, 2022 Posted December 18, 2022 23 hours ago, onetrack said: I watched a bloke build a steel cruiser in his workshop yard in the town of Corrigin in W.A. for over 20 years. He built the cruiser from scratch, from purchased plans. He was a steel fabricator by trade. Apparently the only thing he didn't do himself on the cruiser, was the curved steel part of the bow, he got a shipbuilder in from Perth to do that curved part for him. Slowly but surely over the years, the cruiser took shape - then one day, it was gone! He'd finished it, and had it trucked to the coast, where it turned out to be a very successful, fully completed boat, which he apparently enjoyed cruising in, in his retirement, for quite a number of years. One good thing about steel is that it's easily repairable if you can stay afloat and get back to port. I know of a few wooden trawlers that have run aground and then been reduced to matchwood before they could be salvaged. On the other side of the coin, I knew a couple of blokes who fell asleep with the autopilot on and crashed into the rocks at Noosa in their steel trawler. The rock punched a three foot diameter hole in the bow, just above the waterline. They stuffed mattresses and whatever they could find in the hole and very slowly steamed back to Mooloolaba. The bilge pumps couldn't keep up with the amount of water taken on while steaming, so they would pull up every few k's and let it pump out. They could do that because the hole was just above the waterline while stationary. They made it back to port ok, and I saw the boat on the slip the next day getting the damaged section cut out and a patch welded in. The trawler was back in the water working after three days. A wooden boat wouldn't have survived an impact like that. The crew was sound asleep and would have been steaming probably at six knots straight into the cliff face. 2
willedoo Posted December 18, 2022 Posted December 18, 2022 18 minutes ago, red750 said: Peter, you must be glad you don't drink when you see photos like that. 1 1
Cosmick Posted December 19, 2022 Posted December 19, 2022 On 17/12/2022 at 5:51 PM, red750 said: Provided the brick yacht displaces water weighing more than itself, it should float. There have been many cement yachts, like this one near our old men's shed, although it looks like it has never been near water. It has been there for more than the 10 years I have attended the shed, and from the size of the tree and hedge it doesn't look like it has moved an inch. USA BUILT CEMENT SHIPS IN WW1 AND WW11, I think 2 were involved in D-Day armada. 2
Yenn Posted December 19, 2022 Posted December 19, 2022 There are many ferro cement ships built in Australia. They are built of a steel inner frame composed mainy of chicken netting on a thin re bar base. This is plastered from inside and outside all in one session, trowelled to a smooth finish and kept moist until the concrete has finally set. A mate of mine built one which was so well made that if you tapped a bulkhead with a hammer, it would ring like a bell. as far as I know it is still sailing in New Guinea 50 years later. The same technique has been osed to build domed buildings, dating back centuries to roman times. 1 3
spacesailor Posted December 19, 2022 Posted December 19, 2022 Ferro vs steel !. Ferro is repairable with a ' bag of Cement & a trowel ' . A steel anything requires ' power tools ' AND an expert welder . The New ferro has No cement, but ' epoxy ' to bind all those sand particles together . Makes for a much lighter hull ! , But A sailing vessel needs weight to be at the correct trim . spacesailor 1
red750 Posted December 19, 2022 Posted December 19, 2022 6 minutes ago, spacesailor said: A sailing vessel needs weight to be at the correct trim . Ballast. 1
willedoo Posted December 19, 2022 Posted December 19, 2022 I've never been on a steel boat, but blokes who have worked on steel trawlers say it takes a while to get used to the steel deck. They say you get sore ankles for a while. 1
spacesailor Posted December 19, 2022 Posted December 19, 2022 A much lighter hull ! , needs ' much heavier ' ballast to gain the right trim . whilst. a heavier hull needs less ballast .. spacesailor 1
facthunter Posted December 19, 2022 Posted December 19, 2022 Weight high above the waterline doesn't help anything. Steel boats "sweat" inside and don't bend much. The earliest welded steel "Liberty" boats broke in halves. Cook repaired his badly damaged boat near where they were damaged. Must have been akin to being on Mars. Nev 1 1 1
spacesailor Posted December 19, 2022 Posted December 19, 2022 The Old ww2 ferro ships are used to stop the logs in a Alaskan or Canadian river from running up the embankment, the steel hulled ships were holed then sank. Steel hulls also have a serious problem with ' electrolysis burning holes though the metal hull. . spacesailor 1
facthunter Posted December 19, 2022 Posted December 19, 2022 Probably 99% of the tonnage of all ships is steel.. Nev 1
Old Koreelah Posted December 19, 2022 Posted December 19, 2022 1 hour ago, spacesailor said: A much lighter hull ! , needs ' much heavier ' ballast to gain the right trim.. Tall wooden sailing ships needed quite a bit of ballast. Early convict ships carried cut stone from England, ready to be used in public buildings. Some of Newcastle’s breakwater is madeof rubble from the San Francisco earthquake. 1
Old Koreelah Posted December 19, 2022 Posted December 19, 2022 1 hour ago, facthunter said: …Cook repaired his badly damaged boat near where they were damaged. Must have been akin to being on Mars. Nev I wonder how that Australian timber performed. 2
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