tag:blogger.com,1999:blog-7334230772332433270.post7912811107642011745..comments2024-02-27T11:15:46.473-06:00Comments on Quidnon: Deck ArchesDmitry Orlovhttp://www.blogger.com/profile/00381674543530177679noreply@blogger.comBlogger23125tag:blogger.com,1999:blog-7334230772332433270.post-69406938113904401222016-08-06T02:00:52.769-06:002016-08-06T02:00:52.769-06:00Yes, that's the idea. And the travelers will b...Yes, that's the idea. And the travelers will be mounted on top of the deck arches. I need to test out the concept on a prototype, which I now have all the mechanical parts for, just haven't put it together yet.Dmitry Orlovhttps://www.blogger.com/profile/00381674543530177679noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-29800933165824927172016-08-06T01:58:57.797-06:002016-08-06T01:58:57.797-06:00The diamond plate is mostly for durability and abr...The diamond plate is mostly for durability and abrasion resistance. Yes, aluminum conducts heat well and radiates it poorly, but here it is backed by fiberglass and an inch of plywood, which insulate the hull's internal space. Judging from a sailboat that has aluminum diamond plate on its deck, this works quite well. The glare is tolerable (white paint produces too much glare, which doesn't work) it's fine to walk on barefoot even when it's in full sunlight, and, most importantly, it's zero maintenance. But if somebody wants to paint it, who's to stop them?Dmitry Orlovhttps://www.blogger.com/profile/00381674543530177679noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-25541045772309646822016-08-06T01:53:02.332-06:002016-08-06T01:53:02.332-06:00Dynel works well for covering wooden hulls, made o...Dynel works well for covering wooden hulls, made of lumber, because the sticks aren't dimensionally stable and tend to flex in various ways. With plywood hulls, the material is dimensionally stable, isometric, and fiberglass has been proven to work extremely well, with no cracks after over 30 years. There is no problem, and nothing to fix.Dmitry Orlovhttps://www.blogger.com/profile/00381674543530177679noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-2993739635872182812016-08-06T01:52:36.620-06:002016-08-06T01:52:36.620-06:00It's a sailing scow. Barges are a bit differen...It's a sailing scow. Barges are a bit different: vertical, flat sides, flat bottom instead of rockered, etc. Scow hulls win races; barges - not so much.Dmitry Orlovhttps://www.blogger.com/profile/00381674543530177679noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-66459365844989413312016-08-05T22:34:01.525-06:002016-08-05T22:34:01.525-06:00I finally took the time to look at that "shee...I finally took the time to look at that "sheet traveler" diagram you put up here, and I must say that I think that it's brilliant, if I am understanding it correctly. Am I right in believing that the travelers are range bound so that when you tack, the top & bottom most sheet blocks switch places and the other two also just switch places? Where would it be mounted? On the arch, perhaps?MoonShadowhttps://www.blogger.com/profile/07026735575577934205noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-28284007081527373042016-05-15T06:11:02.756-06:002016-05-15T06:11:02.756-06:00Slight quibble. Aluminum diamond plate or other si...Slight quibble. Aluminum diamond plate or other silver material is reflective, but not radiative, this is why Airstream trailers get so much hotter than more conventional ones, which are white. A low cost white paint(after all, it is the deck, not the hull) purely for reflective/radiative purposes would improve that aspect.Anonymoushttps://www.blogger.com/profile/10991334433982855080noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-25753982284559638882016-04-01T12:46:00.369-06:002016-04-01T12:46:00.369-06:00Dmitry,
I like the boat design a lot. One thing I ...Dmitry,<br />I like the boat design a lot. One thing I noticed, you frequently talk about fiberglass coating and epoxy. From a book by John Guzzwell (cold moulding boats) I understand that Dynel cloth with special resins is better to protect a wooden hull. Dynel flexes, fiberglass does not, so if the wood moves, cracks could open up. That problem seems solved with Dynel.<br />Best wishes to you, family and that your plans may succeed.Winfriedhttps://www.blogger.com/profile/01170807952172031358noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-25350600569710322372016-03-28T11:08:46.721-06:002016-03-28T11:08:46.721-06:00Rob,
I think you're right that you need a met...Rob,<br /><br />I think you're right that you need a method to transfer the items onto the hoist over the hatch that leads below deck from the sides. Personally I'd be nervous about the setup you suggested being that I lack the skills of an ironworker and wouldn't likely be able to transfer suspended loads without incident indefinitely. <br /><br />Assuming that the loading process may need to be single-handed, or done by inexperienced people, and that there's wake from passing boats, possibly wave action, wind forces on suspended load, boat heeling, corrosion/fraying on the cables, etc. I think you'd eventually be facing a situation where the load got loose on you and then you've got a swinging load bashing anyone/thing in its path.<br /><br />A more idiot proof alternative might be having the deck hatches fold so that you can clear the coaming plus hatches in a straight lift and fold them flat to allow you to put the load back down on the hatch. Or a dolly/roller system which would let you then winch or push the load around on the deck in a controlled manner. Stuart Cramhttps://www.blogger.com/profile/05071685959474494845noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-67648284193229859162016-03-24T13:41:35.647-06:002016-03-24T13:41:35.647-06:00When I look at this layout and deck, I'm seein...When I look at this layout and deck, I'm seeing the basic design of a light salvage barge. It might need to be slightly larger, 50 to 60 feet, and have a crane, but the basic layout wouldn't change that much. Perhaps I'm anticipating jmg's "Age of Salvage Industrialism" a little early...Jon from Virginiahttps://www.blogger.com/profile/06603009321120447820noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-8939229643125502432016-03-23T02:51:09.628-06:002016-03-23T02:51:09.628-06:00If you want to be able to swing items from below o...If you want to be able to swing items from below onto the deck you might consider having additional pad eyes for your hoist(s) plumb to the deck on each side of the hatch so that as the lift clears the combing you can take up on the outer tackle while slacking the one plumb to the hatch until the lift is over the deck. This would mimic the way cargo was handled with union purchase derricks for decades on traditional cargo ships. Rob Rhodeshttps://www.blogger.com/profile/01491897632393182567noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-17868188016639907722016-03-20T08:19:12.300-06:002016-03-20T08:19:12.300-06:00They shouldn't be corbels, just pieces of pipe...They shouldn't be corbels, just pieces of pipe welded to L-brackets. Then they'll look entirely unobtrusive and traditional.Dmitry Orlovhttps://www.blogger.com/profile/00381674543530177679noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-67067615297576511002016-03-20T08:03:31.043-06:002016-03-20T08:03:31.043-06:00Corner corbels need to go away (design vise).Corner corbels need to go away (design vise).Unknownhttps://www.blogger.com/profile/15384627666712529242noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-73886592067001580202016-03-18T16:09:48.649-06:002016-03-18T16:09:48.649-06:00I thought that junk rigs didn't have a true bo...I thought that junk rigs didn't have a true boom.<br /><br />1) How much mass can the boom lift safely? Do you plan on over-building the boom for this purpose? Will a counter-weight on the other end of the boom be required?<br /><br />2) How much mass can I secure down to the deck before I'm too top heavy to venture out away from the coast?<br /><br />I guess I'm asking for safe use limits, but I'm sure you don't have those numbers this early.MoonShadowhttps://www.blogger.com/profile/07026735575577934205noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-32130457023095906382016-03-18T14:11:16.779-06:002016-03-18T14:11:16.779-06:00I hope you are right. Even if the performance of t...I hope you are right. Even if the performance of the model is not strictly representative of the performance of the full-scale hull, it will allow us to work out ballast, sheeting, etc. Also, we'll figure out the right size, angle and ballast for the centerboards and the rudder blades. All of that is hard to work out without a physical model.Dmitry Orlovhttps://www.blogger.com/profile/00381674543530177679noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-40587712692289209122016-03-18T14:09:02.324-06:002016-03-18T14:09:02.324-06:00In a perfect calm the chimney effect would draw ai...In a perfect calm the chimney effect would draw air out of the cabin through the arches and in through open hatches. Open ports don't sound good to me: they are expensive and unreliable.Dmitry Orlovhttps://www.blogger.com/profile/00381674543530177679noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-24095271658566092782016-03-18T14:07:19.590-06:002016-03-18T14:07:19.590-06:00I am not too concerned about the arches as emergen...I am not too concerned about the arches as emergency flotation, that's just an added bonus.<br /><br />The traditional way of getting cargo aboard is to use the boom as a crane.<br /><br />I doubt that anyone would be mad enough to take QUIDNON out on the open ocean with lots of heavy stuff on deck.Dmitry Orlovhttps://www.blogger.com/profile/00381674543530177679noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-69699723792462847562016-03-18T13:36:22.980-06:002016-03-18T13:36:22.980-06:00No, the arch vents should work fine as is. They a...No, the arch vents should work fine as is. They are fancy wind scoops. So long as there is an apparent wind across the arches from front to back, any chimney effect would be negligible.MoonShadowhttps://www.blogger.com/profile/07026735575577934205noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-15416800039695595722016-03-18T13:21:42.854-06:002016-03-18T13:21:42.854-06:00Utilizing the arches as cabin ventilation is a goo...Utilizing the arches as cabin ventilation is a good idea since they would provide a bit of chimney effect - but during times of dead air they would only likely work well as evacuation of stale (warm) air from the cabin without allowing much fresh (cool) air to enter since the ingress/egress vents are at the same level above the deck. Perhaps a few of the ports could be made operable to allow fresh (cooler) air to enter below as the warmer air is evacuated. Martinhttps://www.blogger.com/profile/04410439088299142773noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-76632291222357367922016-03-18T12:30:23.546-06:002016-03-18T12:30:23.546-06:00Dmitri, using the arches as emergency floatation s...Dmitri, using the arches as emergency floatation seems risky to me, with the high potential that the vents will leak or already be open on a capsize. Perhaps sealing up the inside of the upper mast section with Great Stuff foam after the internal power & antenna lines have been installed would work as well.<br /><br />Also, I'm curious how cargo heavy enough to require the winch over the cargo hold gets onto the boat deck. I'm sure you have a plan there too, I just haven't figured it out yet.<br /><br />Your mentioning of heavy gear on the deck made me think of this http://www.leafgenerator.com/ which would be a great fit for a small spark engine running at a level thrust for hours at a time, such as a boat motoring through doldrums or up a slow river. <br /><br />But how would storing so much mass on the deck, as opposed to in the hold, affect Quidnon's stability in a gale? Seems like that raising the center of gravity would increase capsize risk. I'm not shy of some risk, so long as I know how my actions might increase my risk.MoonShadowhttps://www.blogger.com/profile/07026735575577934205noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-88633530058782287472016-03-18T12:15:38.077-06:002016-03-18T12:15:38.077-06:00My first house was 650 square feet. This is not a...My first house was 650 square feet. This is not a small boat.MoonShadowhttps://www.blogger.com/profile/07026735575577934205noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-20005037720666260632016-03-18T08:39:17.261-06:002016-03-18T08:39:17.261-06:00My New York apartment had 330 square feet. My New York apartment had 330 square feet. Larkinhttps://www.blogger.com/profile/07723564315149623909noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-58950144209539725422016-03-17T22:37:28.116-06:002016-03-17T22:37:28.116-06:00I look forward to the sea trial report of the mode...I look forward to the sea trial report of the model. I agree with Alan; make the model bigger.Matthttps://www.blogger.com/profile/10584059231348106116noreply@blogger.comtag:blogger.com,1999:blog-7334230772332433270.post-24674636970798973202016-03-17T18:18:35.723-06:002016-03-17T18:18:35.723-06:00Your model will surprise you with how well it sail...Your model will surprise you with how well it sails. I've built quite a few weird models that you wouldn't imagine sailing well at all yet they went quite well. I don't know how predictions are made with regard to the full scale versions of test models but I would imagine there are equations that naval architects apply to the results of model testing. Tank testing of hull shapes has been around a very long time. A suggestion - one I will apply to MY next model - is to make it bigger than an inch to a foot. Once it is out there on the lake it will look mighty small!Alan Joneshttps://www.blogger.com/profile/17633386901505182550noreply@blogger.com